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INSECT LIFE
 LIFE AND LOVE OF
THE INSECT
By J. H. FABRE. Translated by Alexander Teixeira de
Mattos. Containing 26 Illustrations, 11 of them full-page
from Photographs. Price 6s. net (by post 5s. 4d.).

" Rarely have we come across a book on natural history written

so attractively. He invests his subject with a fascination which
should attract many readers who are now outside the ranks of
students of natural history. The illustrations are excellent and
most illuminating."— Cc'««0' GentUvtan.

HIGHWAYS AND BYWAYS OF

THE ZOOLOGICAL GARDENS
By CONSTANCE INNES POCOCK. Containing 32 full-
page Illustrations from Photographs and a Frontispiece in
colour. Small square demy 8vo., cloth, price 6s. net.
Extract from a Press Opinion.— " And so, with a profusion
of domestic' touches such ai these, Mrs. Pocock carries us through
—
'

the principal sections of the Gardens in her attempt to as she

des ribes it— 'carry the Zoological Gardens to those who are unable
to go to them.' In that description there is something lacking of
justice to herself, for undoubtedly those who can go to the Gardens
will find the pleasure attached to their visit greatly enhanced by a
previous perusal of these ^2.%^i."— Horse and Hound,

THE ZOO
By A. W. PETERS. In the " Artists' Sketch Book " Series.
Large square demy 8vo., with Artistic Covers and Wrappers,
bearing a design by the artist and containing 24 reproductions
in facsimile from pencil drawings.

Difficulties of reproduction have hitherto hindered the employ-

ment, for illustrative purposes, of the pencil, which artists have
always found the most sympathetic and responsive medium at their
command for sketching purposes. In the ''Artists' Sketch Book"
Series the publishers venture to think they have successfully over-
come these difficulties.

PUBLISHED BY
A. AND C. BLACK, LTD., 4, 5 AND 6 SOHO SQUARE, LONDON, W. I

AMERICA .... THE MACMILLAN COMPANY

64 & 66 FIFTH AVBNUH, .N EW YORK

AUBTBALASIA . . . OXFORD UNIVERSITY PRESS

V)'^ FLINDERS Lane, MELBOURNE

CAHADA THE MACMILLAN COMPANY OF CANADA. LTD.

MARTtWs House, 70 Bond Strbbt, TORONTO
."^T.

MACMILLAN & COMPANY. LTD.

MACMILLAN BUILDING, BOMBAY
300 Bow Bazaar Strbbt, CALCUTTA
 PLATE I

1 1 i Y
1. Mylabris capensis o. Pinielia angiuata i8. Mordella penata
2. Pyrocliroa coccinea 10. Camaria sp. 19. Fterohela-iis sp.
3. Neloeproscarabseus 11. Zophobus sp. 20. Rhipiphorus sp.
i. Calopiis serraticornis 12 .Mylabris trifasciata 21. Phrenapates bennetii
5. Gonitis qiiadripiinctata 13 Nictobates gigas 22. Tetraonyx sexguttatus
6. Hypaiilax ovalis 11. Mylabris transversalis 2J Odontopiis ciipreus
7. Psammodes spinolae 15. Ciiiroscelis passaloides 24. Cantliaris dives
8. Helaeus Hopei 10. Cantliaris quadrimaculata 25. Coelociiemis obesa
17. Anomalipes dentipes
INSECT LIFE
BY C. A. EALAND, M.A.,
WITH 74 FULL-PAGE ILLUSTRATIONS
24 BEING FROM PHOTOGRAPHS
BY THE AUTHOR AND 50 IN COLOUR
FROM NATURE

PUBLISHED BY A.& C. BLACK, Ltd.

SOHO SQUARE LONDON, W.I 1 92
 INTRODUGTIOlN

" Insect Life " breaks new ground. It is an attempt

to provide a textbook of Entomology, useful alike
to the serious student and to the reader who takes
up the subject as a hobby.

As far as possible technicalities have been avoided,

but the probable
utility of the book to teachers has

not allowed of them being altogether eliminated.

The more important species of a very large number
of families have been dealt with ; it is clearly im-
possible, however, in a book of but three hundred
odd pages, to cover the vast field of present-day
Entomology.
To my publishers I am indebted for many kind-
nesses in the production of the book. To Messrs.
Jansen I express my appreciation for the loan of
many specimens illustrated in " Insect Life."

C. A. E.
London, 1921.
 CONTENTS
CHAPTER I
PAOE
INTRODUCTION, CLASSIFICATION, AND METAMORPHOSIS - - 1

CHAPTER II

SOCIAL HABITS, COLOURING OF INSECTS, AND ECONOMIC

QUESTIONS - - - - - - - 29

CHAPTER III

..-..-
COLLEMBOLA, THYSANURA, MALLOPHAGA, ANOPLURA, ODONATA,
PLECOPTERA, EPHEMEROPTERA, ISOPTERA, AND ORTHOP-
TERA 59

CHAPTER IV
EUPLEXOPTERA, EMBIOPTERA, PSOCOPTERA, THYSANOPTERA,
RHYNCHOTA - - - - - - 98

CHAPTER V
PLANIPENNIA, TRICHOPTERA, AND LEPIDOPTERA - - 127

CHAPTER VI
COLEOPTERA AND STREPSIPTERA . - _ . 173

HYMENOPTERA ------- CHAPTER VII

223

----- CHAPTER VIII

Appendix .-----.
siphonaptera and diptera 279

316
 LIST OF FULL-PAGE PLATES
MOSTLY IN COLOUR
Tliose viarlied with an asterisk (*) are in blade and white

PLATE FACTNO PAGE

I. MYLABRIS PYROCHROA COCCINEA AND
CAPENSIS,
TWENTY-THREE OTHER BEETLES - Frontispiece
*II. LAPPET MOTH AT REST AMONG DEAD LEAVES]
24
GIANT COCKROACH - - - -/

III. A GROUP OF DRAGON-FLIES - - - 66

*IV. STICK insect]
81
MANTIS J

*V. HEAD OF MANTIS 1

84
LONGICORN beetle/
*VI. HEAD OP STICK INSECT, HIGHLY MAGNIFIED -
88
*VII. LEAF INSECT - - - - - 91
*VIII. NEW ZEALAND CRICKET - - - - 94
*IX. GIANT WATER BUG - - - - 113
*X. CICADA - - - - - - 115
IX. A GROUP OF HOMOPTERA - - - - 116
*XII. HEAD OF CICADA, UNDER SIDE, HIGHLY MAGNIFIED 118
*XIII. LANTERN FLY - . - . . 120
*XIV. A

*XV.
XVI.
ALDER FLY -.----
MEMBRACID WHICH MIMICS A THORN

ORNITHOPTERA BROOKIANA, MALE AND FEMALE

- -

-
123
126
129
XVII. ORNITHOPTERA HEPH^STUS, MALE AND FEMALE -
132

|ix
 INSECT LIFE
PLATE F.v.-isi; PAGE
XVIII. THAIS RUMINA, LASIOCAMPA TRIFOLII AND EIGHT
OTHER BUTTERFLIES - - - - 136
EPICALIA NUMILIA, PAPILIO SARPEDON AND SEVEN
OTHER BUTTERFLIES - - - - 138
VANESSA URTIC.^ (SMALL TORTOISESHELL) OVA,
LARViE, PUP^ AND IMAGO - - - 140
XXI.

XXII.
FLIES .-.---
VANESSA ATALANTA (rED ADMIRAL), VANESSA CARDUI
(painted lady) AND THREE OTHER BUTTER-

MELIT^A CINXIA (GLANVILLE FRITILLARY), MELITiEA

142

XXIII.
BUTTERFLIES
KALLIMA INACHIS (a
- ...
ATHALIA (heath FRITILLARY) AND FIVE OTHER

LEAF BUTTERFLY)
-

-
145
147
XXIV. COLIAS EDUSA (CLOUDED YELLOW), GONEPTERYX
RHAMNI (brimstone) AND SEVEN OTHER BUTTER-
FLIES
XXV. MORPHO ACHILLES
- -

- ...
-

XXVI. MELANARGIA GALATHEA (MARBLED WHITE), EREBIA

- - -

-
148
150

EPIPHRON (MOUNTAIN RINGLET) AND EIGHT OTHER

BUTTERFLIES - - - - - 152
XXVII. COENONYMPHA PAMPHILUS (SMALL HEATH), THECLA
RUBI (GREEN HAIRSTREAK) AND TEN OTHER
BUTTERFLIES - - - - - 155
XXVIII. DELIAS PYRAMUS, TERACOLUS JOBINA AND SEVEN
OTHER BUTTERFLIES - - - - 156
PALILIO MACHAON (sWALLOW TAIL), APORIA CRATAGI
(black veined white) AND SEVEN OTHER
BUTTERFLIES - - - - 158
XXX. PAPILIO cenea (red variety), (male and female)
AND THREE OTHER BUTTERFLIES - -
161
LYC^NA BELLARGUS (CLIPDEN BLUE), LYC^INA
CORYDON (CHALK-HILL BLUE) AND ELEVEN OTHER
BUTTERFLIES - - - - - 163
XXXII. ACTIAS SELENE - - - - - 164
XXXIII. ATTACUS ATLAS ( ATLAS MOTH) - - - 166
 LIST OP FULL-PAGE PLATES xi
'^^'^'^^
FACING PA015
XXXIV. ACHERONTIA ATROPOS, SPHINX CONVOLVULI AND
SEVEN OTHER MOTHS - - - -163
XXXV. CHiEROCAMPA ALECTA, DEILEPHILA VERPERTILLIO
AND FIVE OTHER MOTHS - - _ I'Jl

XXXVI. COSSUS LIGNIPERDA, ZEUZERA PYRINA AND FOUR-

TEEN OTHER MOTHS - - - - 172
XXXVII. PLUSIA CHRYSITIS, HALIAS PRASINANA AND NINE
OTHER MOTHS - - . . . I74.

*XXXVIII. A STAG BEETLE (mALE) - - - - 176

XXXIX. DICRANURA VINULA, LOPHOPTERYX CAMELINA AND
TWENTY-TWO OTHER MOTHS - . . ^79
XL. MACROGLOSSA STELLATARUM, MACROGLOSSA FUCI-
FORMIS AND TWENTY-ONE OTHER MOTHS - - 180
XLI. UROPTERYX SAMBUCARIA, RUMIA LUTEOLATA AND
THIRTY-ONE OTHER MOTHS - - - 182
*XLII. THE LONG-HANDED BEETLE
*XLIII. HERCULES BEETLE -

*XLIV. HEAD OF HERCULES BEETLE (MALE)

*XLV. GOLIATH BEETLE
} Between 184-185
*XLVI. GOLIATH BEETLE - - .

*XLVII. GOLIATH BEETLE

*XLVIII. GIANT TIGER BEETLE
*XLIX. FIDDLE BEETLE - -
-^

L. XYLOPHASIA MONOGLYPHA, DIPTERYGIA SCABRIUS-

CULA AND TWENTY-FIVE OTHER MOTHS - - 187
LI. MELANTHIA BICOLORATA, HYPSIPETES SORDIDATA
AND FORTY-FIVE OTHER MOTHS - - - 188
LII. MANIA MAURA, MANIA TYPICA AND TWENTY-THREE
OTHER MOTHS - - - - .
igQ
LIII.

OTHER BEETLES -----

SILPHA THORACICA, SILPHA RUGOSA AND TWENTY
I93
LIV.

EIGHTEEN OTHER BEETLES ...

GNORIMUS NOBILIS, MELOLONTHA VULGARIS AND
^95
xii INSECT LIFE
PLATE FACING PAGE
LV. AMAURODES PASSEEINI, DICRANOCEPIIALUS WALLICHI
AND FOURTEEN OTHER BEETLES - - 195
LVI. A GROUP OF TIGER BEETLES - - - 198
LVII. DICHIROTRICHUS PUBESCENS, HARPALUS .IINEUS AND
EIGHTEEN OTHER BEETLES - - - 200
LVIII. PANAG^US 4-PUSTULATUS, CICINDELA CAMPESTRIS
AND THIRTEEN OTHER BEETLES - - - 203
LIX. DYTISCUS PUNCTULATUS (FEMALE), ACILIUS SULCATUS
(female) and twelve OTHER BEETLES - 204
LX. PHILONTHUS JENEUS, OCYPUS MO RIO AND SEVEN-
TEEN OTHER BEETLES - - - - 206
LXI. A GROUP OF CLICK BEETLES - - - 209
LXII. CYPHOGASTRA JAVANICA, CONOGNATHA PRACTIOSSIS-
SIMA AND FOURTEEN OTHER BEETLES - - 211
LXIII. DONACIA DONACIA SEMICUPREA
CRASSIPES, AND
TWENTY-ONE OTHER BEETLES - - - 212
LXIV. ZOPHOBAS SP., ERODIUS ORIENTALIS AND TWENTY
FOUR OTHER BEETLES - - - - 214
LXV. MOLURIS GIBBA, GONOPUS TIBIALIS AND NINETEEN
OTHER BEETLES . . - . 216
LXVI. LAMPYRIS NOCTILUCA (MALE), TELEPHORUS RUSTICUS
AND THIRTEEN OTHER BEETLES - - - 219
*LXVII. HEAD OF PALM WEEVIL, GREATLY ENLARGED - 220
LXVIII. ITHOCRITUS RUBER, SPHINGNOTUS MIRABILIS AND
NINE OTHER BEETLES - . - . 222
*LXIX. COCOON OF PALM WEEVIL - - - - 224
LXX. A GROUP OF WEEVILS
LXXI. A GROUP OF BEES
*LXXII. NEST OF LEAF-CUTTER BEE
....
-

-
.

-
-

.
.

-
228
236
248
LXXIII. A GROUP OF DIPTERA . _ . . 299
LXXIV. BRITISH FLIES . - . _ . 302
 INSECT LIFE
CHAPTER I

INTRODUCTION, CLASSIFICATION, AND

METAMORPHOSIS
Introduction.
The entomologist of to-day is a scientist; lie bears no
manner of semblance to his predecessors, who, long-
haired and bespectacled for choice, garbed in apparel of
uncommon cut, roamed the countryside in search of
plunder. There is no other word for it; the old time
" bug-hunter " was out to kill: he helped to make some
of our uncommon insects wellnigh extinct. And the
object of his depredations was merely the filling of some
tawdry, pendant glass-topped case with specimens
arranged in bizarre patterns.
Nowadays these one-time sportsmen are as extinct
as theDodo; they do not exist outside musical comedy,
and their musty hotchpotches of specimens have either
gone the way of their sponsors or are accumulating dust
in forgotten corners of antique shops.
Entomology is slowly but surely coming to the fore;
even our most conservative Universities have admitted
the subject to their curricula, and, the world over,
trained entomologists are gathering knowledge that will
1
2 INSECT LIFE
enable their fellows to combat harmful and destructive
insects.
For a reason difficult to explain the sister sciences
of botany and entomology are often looked upon as
being somewhat effeminate. The idea is fostered in our
public schools. The boy who takes up chemistry or
physics is, in the eyes of his schoolfellows, except those
super-youths who scan their small horizon through
glasses of classic mould, merely foUomng a natural,
healthy bent. The budding botanist or entomologist
isusually a butt for crude sarcasm, or worse.
Let the lover of plants and insects take heart; his
hobby may carry him to realms of real utility. Putting
aside systematic work for the moment, we are learning
more and more each day the immense importance of
economic entomology. The medical man knows that
many of the most deadly human diseases are carried
from patient to patient solely by insects. Despite this
knowledge, it is a most astounding fact that there are
an almost infinitesimal number of medical men who
possess even a, so-called, nodding acquaintance with
entomology. Many most brilliant discoveries
of the
in this branch have been made by laymen.
of the science
The fruit-grower knows, or should know, that only
by a knowledge of the life-histories of the harmful insects
that take crops is he able to deal with them
toll of his
effectually. The market-gardener and the farmer are
in like case. The latter, if he be also a stock-keeper,
has a double watch to keep, for there are many insects
which bring disease and even death to his cattle.
In the farm, the orchard, the poultry-yard, even in
our homes, the ubiquitous insect is waging constant
 INTRODUCTION 3

warfare against man and his belongings. How, tlien,

can a science whicli enlightens us concerning the means

best fitted for combating the common enemy be other
than important ? It is hardly necessary to labour the
point that, the more we know of our enemies, the more
effectually we are enabled to render futile their m&,china-
tions.
Numerically insects far exceed the combined total of
allthe other living creatures on this earth of ours. In
sizethey vary from giant stick insects and Moths,
measuring several inches in body-length and wing-span
respectively,down to minute Beetles, invisible to the
naked eye, and much smaller than Cheese-mites, which
were once thought to be the smallest creatures. Their
lives may be spent almost wholly in the air, in water,
and on or in the soil. Many dwell during one period of
their lives in one element and in another during the
remainder of their existence. There are few substances,
natural or man-made, which will not af!ord a home to
some insect species.
In taking up the study of entomology seriously,
whether as a hobby or as a profession, one is at once
confronted with the problem of selecting which branch
of the science to pursue. Maybe systematic work will
appeal most strongly, or medical entomology. The
student who already possesses a knowledge of botany
will probably be attracted to the study of insects destruc-
tive to crops. This, however, is a point that need not be
laboured beyond the reminder that we live in an age of
specialists; and the all-round entomologist is as rare as
the quondam " bug-hunter.''
Systematists may be called the foundation-stones
4 INSECT LIFE
of tlie entomological edifice ; they are tlie indispensables
of tlie science. It may appear stale and unprofitable
to sit, day by day, within tbe four walls of a museum

studying a single order of insects, or, perchance, merely

a small group, picking out here and there minute but
important details which may or may not be essential to
the better ordering of their specimens. From the time
of the great Swedish naturalist Linnseus to the present
day, the systematists have laboured to the advantage
of entomology in general. The medical entomologist
must either know something of systematic work or turn,
time and again, to the systematist for help; so, perforce,
must the student of agricultural entomology and all
others who would study the lives of insects for of what ;

avail to know how some six-legged creature spends

is it

its days if one remains ignorant of its relationships or

even of its identity ?
In the pages which follow we have essayed a review
of the more salient features of insect life. The text is
arranged on strictly scientific lines and with the greatest
** ''
attention to accuracy, for it is hoped that Insect Life
may appeal to teachers and students of entomology.
We are, however, mindful that many of our fellow- men
will only take kindly to a new subject when they feel
assured that no attempt is being made them a
to ofEer
surfeit of dry-as-dust facts. On that account every
endeavour has been made to keep paramount the
innate interest of insect life.

No single volume could ever deal with every form of

insect life; our pages, perforce, only treat of a relatively

small number of types. A knowledge of the structure,
relationships, and habits of these typical insects will,
 CLASSIFICATION 5

it is hoped, lead to a closer study of entomology in

general, a consummation whicli will render the writing
of " Insect Life '"
worth while.

Classification.

Very many years ago, in the middle of the eighteenth

century to be exact, Linnaeus laid the foundations of
modern zoological classification. Seeing that more
than a quarter of a million different kinds of insects are
known to entomologists, it is evident that their orderly
and methodical arrangement is a matter of necessity.
however, that entomologists are not
It is unfortunate,
agreed and apparently cannot agree upon a definite
scheme of classification.
As in the case of all animals, insects are arranged in
orders, suborders, families, subfamilies, genera, and
species. They are placed in these categories according
to their apparent relationships with one another, as
judged, mainly, by their anatomical structure. Even
at the present day there is considerable difference of
opinion as to the characters which are of sufficient
importance to warrant placing certain insects in the same
category. Some authorities recognize but eight orders,
others more than a score, and between the two there is

ample choice. Before proceeding to a consideration of

the reasons for this diversity of opinion, it is as well to
be clear concerning the fundamentals of classification.
The placing of insects in various groups is not a mere
arrangement for the sake of convenience. Such is our
knowledge at the present day that, even with our
imperfect and ever-changing schemes of classification,
6 INSECT LIFE
they are arranged, or should be arranged, according to
their descent. Mere external appearance is no sure
guide in making a classification. Various modifications
for particular modes of life will often so change the
outward aspect of an insect that, judging by externals
alone, the most distantly related forms would be grouped
together. A study of development and internal ana-
tomy is absolutely essential, and will alone reveal true
relationships. In any group then, whether the members
,

outwardly resemble one another or not, if they are

correctly placed, they are all blood relations. Being
relations, it is highly probable that they will, for the
most part, be somewhat similar to one another, but
there are aberrant forms in many groups.
The first step in classification consists in dividing the
animal kingdom into branches, and insects are placed
in the branch Arthropoda because their bodies are more
or less distinctly segmented and their appendages
(legs, etc.) are jointed. The branch Arthropoda com-
prises five classes:

I. Crustacea (Lobsters, Crabs, Shrimps, etc.).

II. Onychophora (Slime Slugs).

III. Myriapoda (Centipedes, etc.).

IV. Insecta (Insects).

V. Arachnida (Scorpions, Spiders, Ticks, etc.).

Of these, Insecta only need be considered. In certain

books the class is known as Hexapoda, for the reason
that adult insects are always provided with six legs —
in fact, the number and the division of the body
of legs
(not always apparent) into head, thorax, and abdomen,
distinguishes insects from all other creatures.
 CLASSIFICATION 7
The class Insecta is divided into three subclasses

A. Apterygota (the members of this subclass never

develop wings).
B. Exofterygota (the members of this subclass have
wing-rudiments visible throughout growth).
C. Endopterygota (the members of this subclass have
hidden wing-rudiments)

The Apterygota are wingless throughout life. There

are other so-called wingless insects which do not belong
to the subclass, but they possess the rudiments of wings,
as careful examination, either external or internal, will
show.
The Exopterygota always have their wings, or at least
rudiments of wings, visible during their periods of growth.
The common Cockroach belongs to this subclass, and
the young Cockroach, in common with all other insects
similarly classified, emerges from the egg provided with
the rudiments of wings.
The Endopterygota includes all those insects which
pass through a caterpillar stage. During this stage
growth takes place, but no amount of investigation will
give any hint of the wings with which the insect is to be
provided at a later stage of its development.
The three subclasses are divided into orders, and at
this point there is considerable diversity of opinion as
to the degree of subdivision which should take place.
Linnaeus recognized but seven orders; the American
practice is to make use of nineteen orders. Carpenter,
a noted authority, divides his insects into twenty orders.
For convenience sake the orders dealt with in " Insect
Life " are tabulated,and a brief description of each
8 INSECT LIFE
order follows tlie table. Three of the orders, Protura,
Zoraptera, and Zeugloptera, are merely of academic
interest, and are only included to make the scheme of
classification complete.

CLASS INSECTA OR HEXAPODA

Subclass After ygota

Orders Families.
I. Protura.
II. CoUembola (i.) Aphoruridse, (ii.) Poduridse, (iii.)

Entomobryidse, (iv.) Papiriidse,

(v.) Smynthuridae.
III. Zoraptera.
IV. Thysanura . (i.) Campodeidse, (ii.) Japygidse, (iii.)

Lepismatidse, (iv.) Machilidse.

Subclass Exopterygota.

Orders. Families.
V. Mallophaga (i.) Trichodectidse, (ii.) Philopteridee,
(iii.) Gyropidse, (iv.) Liotlieidae
VI. Anoplura . (i.) Pediculidae.
VII. Odonata .. (i.) Calopterygidse, (ii.) Agrionidae,
(iii.) Gompbidse, (iv.) Cordu-
ligasteridse, (v.) -ffisclinidse, (vi.).
Cordulidee, (vii.) Libellulidse.
VIII. Plecoptera . Perlidse.
IX. Ephemeroptera Ephemeridae.
X. Isoptera Termitidse.
XI. Orthoptera . (i.) Blattidae, (ii.)Mantidse, (iii.) Phas-
midee, (iv.) Gryllidse, (v.) Locus-
tidse, (vi.) Acridiidse.

XII. Euplexoptera Forficulidee.

XIII. Embioptera Embiidse.
XIV. Psocoptera . (i.) Psocidae, (ii.) Atropidee.
XV. Thysanoptera Thripidae.
XVI. Rbynchota.
 CLASSIFICATION

Suborder Heteroptera.
Orders. Families.
(i.) Pentatomidse, (ii.) Coreidae, (iii.)

Lygseidse, (iv.) Pyrrhocoridse,

(v.) Tingidae, (vi.) Aradidse,
(vii.) Hydrometridse, (viii.) Heni-
cocephalidse, (ix.) Reduviidae,
(x.) Cimicida), (xi.) Capsidee,
(xii.) Nepidse, (xiii.) Belosto-
midse, (xiv.) Notonectidse, (xv.)
Corixidae.

Suborder Homoptera.

Orders. Families.
(i.) Cicadidae, (ii) Fulgoridae, (iii.)
^^ Membracidae, (iv.) tJercopidae,
O (v.) Jassidae, (vi.) Psyllidao, (vii.)

Aphidae, (viii.) Aleurodidae, (ix.)

Coccidae.

Subclass Endopterygota.

Orders. Families.
XVII. Planipennia . . (i.) Sialidae, (ii.) Ehaphidiidae, (iii.)

Mantispidae, (iv.) Conioptery-

gidae, (v.) Myrmelionidae, (vi.)

Hemerobiidae, (vii.) ChrysopidsB.

XVIII. Trichoptera . . (i.) Phryganeidae, (ii.) Limnophilidae,
(iii.) Rhyacophilidae, (iv.) Hy-
droptilidae, (v.) Sericostomatidae,
(vi.) Leptoceridae, (vii.) Hy-
dropsychidae.
XIX. Zeugloptera.
XX. Lepidoptera.
10 ' INSECT LIFE
Suborder Rhopalocera.
Orders. Families.
(i.) Nymplialidse, (ii.) Erycinidae, (iii.)

Danaidse, (iv.) Satyridse, (v.)

Morphidse, (vi.) Brassolidse, (vii.)

Heliconiidse, (viii.) Lycsenidae

(ix.) Pieridse, (x) Papilionidse,
(xi.) Hesperiidse.

Suborder Heterocera.
Orders. Families.
(i.) Castniidse, (ii.) Saturniidse, (iii.)

Bombycidse, (iv.) Eupteroptidse,

(v.) SpMngidee, (vi.) Notodon-
tidae, (vii.) Cymatophoridae, (viii.

Sesiidse, (ix.) Zygsenidae, (x.)

PsycMdae, (xi.) Cossidae, (xii.)

Hepialidas, (xiii.) Drepanidae,

(xiv.) Limacodidae, (xv.) Lasio-
campidae, (xvi.) Endromidae,
(xvii.) Lymantriidae, (xviii.) Hyp-
sidae, (xix.) Arctiidae, (xx.) Geo-
metridae, (xxi.) Noctuidae, (xxii.)
Pyralidae, (xxiii.) Pterophoridae,
(xxiv.) Tortricidae, (xxv.) Tin-
eidae.

Suborder Lamellicornia.
Orders. Families.
XXI. Coleoptera.
(i.) Passalidae, (ii.) Lucanidae, (iii.)

Copridae, (iv.) Melolonthidae, (v.)

Rutelidae, (vi.) Dynastidae, (vii.)
Cetoniidae.

Suborder Adephaga.
Orders. Families.
(i.) Cicindelidae, (ii.) Carabidae, (iii.)

Pelobiidae, (iv.) Dytiscidae.

 CLASSIFICATION 11

Suborder Polymorpha.
Orders. Families.
(i.) Paussidse, (ii.) Gyrinidse, (iii.)

Hydrophilidse, (iv.) Platypsyl-

lidse, (v.) Leptinidse, (vi.) Sil-

phidse, (vii.) Pselaphidse, (viii.)

Staphylinidae, (ix.) Histeridse,

• (x.) Nitidulidse, (xi.) Trogositidse

(xii.) Cryptophagidse, (xiii.) My-

cetophagidse, (xiv.) Coccinellidse,
(xv.) Dermestidae, (xvi.) Byr-
rhid8e,(xvii.) Bostrychidse, (xviii.)
Ptinidse, (xix.) Malacodermidae,
(xx.) Cleridse, (xxi.) Dascillidae,
(xxii.) Elateridse, (xxiii.) Bu-
prestidse.

Suborder Heteromera.
Orders. Families.
(i.) Tenebrionidse, (ii.) Cistelidse, (iii.)

Meloidee.

Suborder Phytophaga.
Orders. Families.
(i.) Bruchid39, (ii.) Donacidse, (iii.)

Sagridse. (iv.) Crioceridae, (v.)

Clythridse, (vi.) Cryptoceplia-

lidae, (vii.) Eumolpidae, (viii.)

Chrysomelidse, (ix.) Halticidse,

(x.) Galerucidse, (xi.) Hispidae,
(xii.) Cassididae, (xiii.) Prionidae,
(xiv.) Cerambycidae, (xv.) Lami-
idae.

Suborder Khynchophora.
Orders. Families.
(i.) Anthribidae, (ii.) Curculionidas,
(iii.) Scolytidae, (iv.) Brenthidae.

XXII. Strepsiptera .. Stylopidae.

XXIII. Hymenoptera.
32 INSECT LIFE

SUBORDEE SeSSILIVENTRES.
Orders. Families.

(i.) Tentliredinidse, (ii.) Siricidse, (iii.)

Cephidse.

Suborder Pbtiolata.
Orders. Families.
Series 1. Parasitica: (i.) Ichneumo-
nidse, (ii.) Brachonidse, (iii.)

Evaniidse, (iv.) Chalcididse, (v.)

Proctotrypidse, (vi.) Cynipidse.
Series 2. Tubulifera: Chrysididse.
Series 3. Aculeata —Division Antho-
phila: Apidse.
Division Diploptera: (i.) Eumenidse,
(ii.) Vespidso.
Division Fossores: (i.) Mutillidee,
(ii.) Thynnidse, (iii.) Scoliidse,
(iv.) Sapygidse, (v.) Psammo-
cliaridae, (vi.) Splirgidse.

Division Heterogyna: Formicidse.

Orders. Families.
XXIV. Siphonaptera Pulicidse.
XXV. Diptera .. .. Series OrtliorrhaphaNeurocera:(i.)Ce-
cidomyiidae, (ii.) MycetopMidse,
(iii.) Culicidse, (iv.) Chironomidse,
(v.) Psychodidse, (vi.) Dixidse,
(vii.) Tipulidse, (viii.) Bibionidae,
(ix.) Simulidae.
Series Orthorrhapha Brachycera: (i.)

Stratiomyidse, (ii.) Leptidse, (iii.)

Tabanidse, (iv.) Scenopinidse,

(v.) Bombyliidse, (vi.) Asilidse,
(vii.) EmpidsB.
 CLASSIFICATION 13

Orders. Families.
Series Cyclorrliapha Aschiza: (i.)

Pipunculidse, (ii.) Conopidse,

(iii.) Syrpliidse.
Series Cyclorrhapha Scliizophora
Group Calypteratre : (i.) CEs-
\ tiidse, (ii.) Tacliinidse, (iii.) Sarco-
phagidae, (iv.) Muscidse, (v.) An-
thomyiidee.
Group Acalypteratse : (i.) Scatopha-
gidse, (ii.) Sepsidse, (iii.) Ortalidse,
(iv.) Trypetidse, (v.) Diopsidse,
(vi.) Oscinida3, (vii.) Drosophi-
Agromyzidae.
lidse, (viii.)

Series Pupiparia: (i.) Hippoboscidae,

(ii.) Braulidse, (iii.) Nycteri-
biidee.

Formidable as this list may by no means

appear, it is

complete as far as tlie To deal,

families are concerned.
however concisely, with even a few members of all the
recognized families would require a volume of enormous
dimensions.
The members of the various families are again divided
and
into genera species, and further division may occur
into subgenera, subspecies, or varieties, but we have
travelled far enough along the badly metalled road of
classification. One or two examples may make matters
more clear. The common House-fly is known to
entomologists the world over as Musca domestica, L.
To assign a high-sounding title to so common an insect

may appear to savour of pedantry. A moment's con-

sideration, however, will show that popular names are
likely to lead to misunderstanding. The House-fly
occurs in practically every part of the world where man
14 INSECT LIFE
has taken up his abode, and the insect has a different
popular name in every language. How is the Britisher
to know that the Typhoid-fly of America and the House-
own country are one and the same insect ?
fly of his
Popular names often differ in neighbouring counties,
yet Musca domestica is the one title which denotes the
common House-fly everywhere. This Fly, then, belongs
to the genus Musca and the species domestica. The
letter L. which followsits name shows that it was first

described by Linnaeus.
The name of the author responsible for an insect's
title is often omitted, but such omission may cause con-
fusion. For instance, there is a common yellow
Humble-bee called Bomhus mmcorum ; there is another,
equally common, yellow and black Humble-bee
of the same name. The former was described by
Kirby and the latter by Smith. Were the author's
names appended, the expert entomologist would know
to which Humble-bee reference was made. In any case,
it is confusing to have two closely related insects bearing

similar names. In the examples we have quoted this

source of confusion is removed by the fact that the
B. muscorum of Kirby had been previously described as
B. venustus by Smith, and the B. muscorum of Smith
had been named B. agrorum by Fabricius, and the name
of the prior author always stands. This is a strict and
necessary rule in classification, for, with many workers
in the field, no uncommon occurrence for a scientist
it is

to describe some form which has already been described.

No animal can have more than one generic and one
specific name, so its first published name is the one by
which it is known.
 METAMOEPHOSIS 15

To return to the House-fly its place in our classifica-

;

tion is made clear by the following brief table

Branch: Arthrofoda.
Class: Insecta.
Subclass: Endo'pterygota.
Order: Diptera.
Suborder: Cyclorrha'pha schizophora.
Genus: Musca.
Species: Domestica.

Metamorphosis and Growth.

The reader who scans our pages cannot fail to be
struck with one outstanding feature^ — all insects pass
through some sort of a change in the course of their
complete lives. In a few, a very few, cases the change
is very slight; the newly born insect is practically a
replica in miniature of its parent, and by increase of
size alone it attains the adult stage. In many cases,
and they are more familiar, the insect only completes
its development by a series of abrupt stages, totally

dissimilar to one another. There are also several

intermediate forms between the two, and a few excep-
tional phenomena which do not rightly fit into any class.
These changes, of whatever their nature, are known as
metamorphosis, and a few typical examples may make
the following pages more comprehensible.
Taking the case of the Common Cabbage White
Butterfly, Pieris brassicce, we have an insect whose
life-cycle —^the complete round from perfect insect to
perfect insect —may be observed without difficulty.
After pairing, the female deposits her eggs upon some
16 INSECT LIFE
plant whicli will form the food of the next stage in the
life-cycle. The egg is the first stage in the metamorphosis
of this insect. In due course the eggs will hatch and
caterpillars will emerge. Caterpillars are technically
known as larvae, and they form the second stage. They
feed ravenously, for the larval stage is a growing stage.
By degrees they grow to such an extent that their skins
are in danger of becoming too small. They cease
feeding for a short period, their outer skins are shed,
and below they are clad in a new and larger skin. Once
more feeding commences, and continues till this skin
also is too small, and the operation is repeated. The
operation of skin-casting is known as moulting, and the
number of moults are constant in each species, but
variable in different species. Some larvae moult but
twice, others as many as twenty times.
Here we may fittingly attempt to remove a very
popular misconception: that adult insects —that is,

insects in their last stage — grow. We often hear the

remark, " Oh, there is a young House-fly!'' as a small
Fly is indicated. As a matter of fact, the individual
usually described as a small House-fly invariably proves
to be another species altogether, the Lesser House-fly,
Fannia canicularis. Someone may here remark that
in a collection of insects it is possible to find several
individuals, which expert entomologists describe as
being all of the same species and sex, of varying size.
This is true, but is easily accounted for; the amount
and quality of food in the larval stage has a very great
bearing upon the ultimate size of the perfect insect,
but we shall return to this subject on another page.
After this digression, let us return to oux larva, which
 METAMORPHOSIS 17

we —
presume is fully fed that is to say, it has com-
will
pleted growth and passed through its last moult.
its

The larva becomes restless, seeks a place where it may

undergo its next transformation, makes itself secure by
means of silken threads, and passes into the resting
pupal stage. The pupa is usually inert; it possesses
but feeble powers of movement, and in our example
never moves from its original position. At any rate
this, the third stage, is outwardly a dormant stage.
Within the pupal case wonderful changes are taking
place, but it is not within our province to deal with them
here. When these changes are complete the pupal
skin splits and the perfect insect or imago emerges,
having completed its life-cycle and possessed of full
sexual characters.
A life-cycle of the nature described above, therefore,
consists of four stages— (1) The dormant egg, (2) the
active growing larva, (3) the dormant pupa, and (4) the
active, non-growing imago. Such a metamorphosis is
said to be complete and is the rule among Hyme^ioptera,
Lepidopera, Dipera, Si'phonaptera, Coleoptera, Trichop-
tera, and Planipennia.
The life-cycle of the Cockroach, Blatta orientaUs, is
quite different. The female deposits her eggs. The
eggs give rise to active larvae, which grow and moult,
as do those of the White Butterfly; but whereas the
latter larvae bore no kind of likeness to their parents,
the Cockroach larvae are very similar to the adults,
except that they are smaller. By a series of moults
they attain nearly the adult stage; at the final moult
they are so similar to their parents that it requires an
expert to say whether they are adults or nymphs, as
3
18 INSECT LIFE
they are called at this stage. The final moult produces
the sexually mature imago.
The metamorphosis of the Cockroach is incomplete;
it includes no resting pupal stage.
There are many other forms of incomplete meta-
morphosis; the transformations of the Dragon-fly may
be cited. The egg gives rise to the active larva, quite
unlike the parent insect. The larva transforms into the
active nymph, which bears considerable resemblance
to the imago into which it will develop. Again there is

no resting pupal stage.

Incomplete metamorphosis is the rule among Orthop-
tera, Rhynchota, Odonata, Mallophaga, Euplexoptera
Plecopterttj Isoptera, and Ephemeroptera.
There are some insects, species belonging to the
Collembola and Thysanura, which might correctly be
described as exhibiting incomplete metamorphosis. As
a matter of fact, their transformations are so slight that
they hardly deserve the appellation, for the larvse simply
grow to the adult stage by a series of moults.
The time taken for an insect to pass through its life-

cycle depends on its species, and, in the same species,

depends upon external conditions, such as climate and
food-supply.
The Seventeen Year Old Locust (p. 119) requires seven-
teen years to pass through its life-cycle; many Aphidce
complete their cycle in a week. Again, certain species
which in this country have two broods a year i.e., pass
through a complete life-cycle twice in twelve months
perform the same operation three times in a similar
period in a warmer climate. The Ant Lion may
undergo its metamorphosis rapidly when food is plentiful;
 METAMORPHOSIS 19

should tlie larva be starved, however, the larval stage,

and hence the life-cycle, is much protracted.
There are many species of insects which contrive to
shorten the period of their transformations, or, more
correctly, their transformations are habitually shortened.
The Sheep Bot-fly, CEstrus ovis, deposits young living
larvae, thus missing the egg-stage; the same phenomenon
is common amongst the Sarcophaga, or Flesh-flies.
Stillmore time is saved by the Tsetse-flies, Glossina,
whose larvae at birth are almost fully grown and ready
to pupate. The Pupiparia were so named because they
were supposed to give birth to pupae; as a matter of
such an advanced stage
fact, their larvae at birth are in
of development that they pupate immediately.
All insects producing living young are said to be
viviparous. The common Aphides afford striking and
easily observed examples of viviparous insects; in them
also may be studied the phenomenon of parthenogenesis
— ^.e., reproduction without pairing. This phenomenon,
rare amongst the Animal Kingdom in general, is fairly
common amongst insects.
Paired female Aphides lay hard, black, winter eggs on
shrubs, etc., likely to provide food for their young. In
the spring the eggs hatch, and after a series of moults
the young grow into wingless females. These wingless
females, unaided by males —indeed, there are none
early in the year —^produce brood after brood of living
wingless females similar to themselves. Later in the
year winged females are born, and they migrate to other
plants, and so spread the race far and wide. Towards
autumn both winged males and females arrive on the
scene ; they pair and as a result the winter eggs are pro-
20 INSECT LIFE
duced. It is evident tliat this parthenogenetic mode
of reproduction is a great time-saver.
A more remarkable variant of the normal life-
stiU
cycle occursamongst certain Cecidomyiidce of the genera
Miastor and OUgarces. The females lay one or two
exceptionally large eggs, from which, in due course?
a larva emerges. This larva, however, is no ordinary
individual, for within its body other larvae develop
other larvse of the same species. The phenomenon
must not be confused with any kind of parasitism,
where larvse of another species or genus or order may
develop from the body of some luckless larva. These
larvse devour the interior of the parent larva, pierce its
empty skin, and come into the world as ordinary larvse.
In exceptional cases these larvse too may give birth to
other individuals, and so on for several generations.
The final generation of larvse behaves in the ordinary
manner, pupates, and gives rise to the adult Fly. A
phenomenon of this nature is known to scientists as
psedogenesis.
Of all these time-saving devices designed by Nature,
evidently with the object of bringing a large insect
population into the world rapidly, nothing is more
extraordinary than the story of the TermitoxeniidcB.
These wingless insects are allied to the Pupiparia; they
dwell in Termites' nests, and they are hermaphrodite
that is to say, there are no separate males and females,

but each individual possesses the characters of both

sexes. These strange creatures lay large eggs, whence
arise, in nearly every case, fully developed adults.
There are a considerable number of insect life-cycles
which cannot be completed without the assistance of
 HYPERMETAMORPHOSIS 21

some other, probably non-related insect. Under this

heading, of course, must be included all cases of para-
sitism; many of these are referred to in the following
pages. One of the most curious of these histories is
that of certain Blister Beetles, Meloidw, and to the
phenomenon the name of hypermetamorphosis has been
given. To Fabre we are indebted for the life-story of
which in its immature
Sitaris humeralis, a Blister Beetle
stages dependent upon Bees of the genus Anthophora.
is

The Beetle deposits its eggs, to the number of about

two thousand, near the Bee's nest; this occurs in the
summer. Towards autumn small black larvse, called
triungulins, because they have three claws on their
tarsi, emerge from the eggs. These larvae hibernate
where they are hatched, and do not feed at all. In the
spring they awake to activity, and their one object is
to become attached to the hairy body of the Bee, at
the door of whose nest they are waiting.
Now, these larvae have no powers of discriminating
between the hairy body of the Bee and any similar
object; as a consequence many of them are carried away
on other objects, maybe the body of a mouse, and never
reach the haven where they would be. It is fortunate
that the mother Beetle is so prolific, for many of its
larvae never attain maturity. It is a general rule in the
Animal Kingdom that in the species whose progeny
normally undergo many risks, great fecundity is shown.
Let us follow the fortunes of a successful triungulin.
Itbecomes attached to the body of a female Anthophora
who, if the larva be fortunate, has stored her honey in
her brood-cell and is about to lay her single egg therein.
As the Bee lays her egg, so the larva releases its hold of
22 INSECT LIFE
her hair, and floats upon the egg as upon a raft. The
Bee and the triungulin is left in sole
closes the cell,
possession of the egg and a store of honey. The larva
makes its first meal of the egg, and occupies about a
week in the devouring of it; all this time it remains
floating on the shell, for immersion in the honey would
be fatal. On the remnants of the egg-sheU the larva
moults, and appears as a totally different creature, able
to float on the honey. For about six weeks it lives in
the honey, which consumes the while; at the end of
it

this time, having devoured all the stores which the cell
contained, the insect changes into a pupa within the
larval skin, and either emerges as a perfect insect in
about a month or delays the advent for a longer period.
Hyper metamorphosis is common amongst the Meloidce;
our common Oil Beetle, Meloe proscarahceus has a very ,

similar life-story to the one just described. It also

depends upon Anthofhora for the upbringing of its
larvae, but it does not deposit its eggs near that insect's
nest. The risk of misadventure, therefore, is far greater
than in Sitaris; as a consequence the female Melee is
more prolific, ten thousand eggs being no unusual
still

number for a single female to lay.

An American Blister Beetle, Epicauta vittata, has a
very similar life-story; the unwilling foster-parents, if
we may use such a term, of its larvae are Locusts of the
genus Caloptenus. In one important particular Epi-
cauta differs from both Sitaris and Melee; its triungulins
are active. Their early Hfe is spent in the egg-cases of
the Locust, and the young triungulins hunt hither and
thither for the object that is to form their home.
Nothing is left to chance ; if a Caloptenus has oviposited
 INSECTS AND PLANTS 23

near the Beetle larvae, they will discover the eggs. As

the risk of failure is diminished, so we find that
Epicauta is not so prolific as the other Blister Beetles.
It must strike the entomologist as strange that female
insects, who have no opportunity of learning by experi-
ence, always lay their eggs either on the food-plant of
their larvae or near it. This habit led to some interesting
experiments quite recently to determine, if possible,
by what means the mother insect was guided in her
choice. Extracts were made from various plants, and
pieces of fabric were soaked with the substances extracted.
It was found that insects in the habit of ovipositing
on, say, Cruciferous plants would oviposit on fabric
soaked with the extract of those plants. The experi-
ments were interesting because they showed, at least,
how insects are guided to certain plants for purposes
of egg-laying. They did not show, however —and the
phenomenon still remains to be demonstrated —how
the insects know which plants will form suitable food
material for their larvae.
The larvae of many species, it is true, are not always
confined to one species of plant for their food. Some
but there are
larvae are fairly catholic in their tastes,
species whose needs are satisfied by one kind of plant
alone. Of these latter insects none are more remarkable
than the Yucca Moths, Pronuba yuccasella. These
Tineid Moths can only obtain their food from the yucca-
flower, their larvae can only live on the yucca-plant,
and the plant can only become fertilized with the
assistance of this one species of Moth. The female is
provided with a peculiar sickle-shaped process on her
maxillary palps, whose use we shall see in a moment.
24 INSECT LIFE
After pairing, the Moth flies to a yucca-flower, collects
pollen from its anthers by means of her sickle-shaped
process, and rolls it into a ball. Next she visits another
flower, and by the aid of her long, pointed ovipositor
she lays an egg amongst the ovules within; at the same
time she places the ball of pollen in a hollow at the apex
of the stigma. The pollen fertilizes the ovules, and the
seeds, to the number of about two hundred, begin to
develop. When the larva emerges, it feeds upon the
ripening seeds; its larval period, however, is of short dura-
tion, and after devouring about twenty seeds pupation
takes place, and the rest of the seeds develop for the
benefit of the yucca-plant.
" The whole proceeding is of great interest . . .

giving us an example of two species absolutely dependent

upon each other for their continued existence. If the
Moth had not the structure to form the pollen-ball and
the instinct to put it on the stigma, the ovules would

not be fertilized and her offspring would have no food;

and if the plant was not prepared to sacrifice some ten
per cent, of its brood, the rest would never develop at
all."

Such a larva as that of the Yucca Moth could not

exist inany other situation but in the ovary of the
yucca-plant. Startling as its life-story may appear,
a moment's consideration will show that all larvae are
beautifully adapted for their particular mode of life.

Dozens of examples are to be found in our pages,

thousands more can be studied in the world around us,
with little effort. The Eat-tailed Maggot, whose
appetitemust be appeased with decaying vegetable
matter from the bottom of some pond, yet whose
 PLATE II

LAPPET MOTH AT REST AMONG DEAD LEAVES

An example of proteciive colouring

GIANT COCKROACH
Faoc 83
 ALTEENATION OF GENERATIONS 25

respiratory apparatus needs air, is marvellously con-

trived to perambulate his muddy home the while he
breathes pure air. The Caddis-fly larva, so delicate
that he would be an easy prey for predatory creatures
which frequent his stream, must perforce build for him-
self the coat of armour which Nature has omitted to
supply. The Vapourer Moth larva, whose mother,
being wingless, has little chance of distributing her
progeny over a wide area, has such nomadic habits
that he, in part at least, makes up for his parent's
deficiency. But there is no need to quote more; a
moment's thought will show that insect larvae are given
every chance to succeed in the world; some do so better
than others, and they are the species that are best
adapted for their particular mode of life.
In addition to what may be termed the normal life-
cycles, and to the exceptions mentioned on the foregoing
pages, there is another form which is worthy of mention.
This form of life-cycle, termed " alternation of genera-
tions," is particularly prevalent among the Gall-flies,
CynifidcB. Let us take the common spangle gall of the
oak as our example. On the under-sides of oak-leaves,
towards autumn, we can very often find little reddish
plates, thicker in the centre than at the edges; these are
the spangle galls of the Gall-fly Neuroterus lenticularis.
With the leaf fall the spangle galls come to the ground,
and as the leaves decay they become separated. In
spring female Flies emerge from the galls; they are able
to reproduce their kind parthenogenetically, and they
do so by depositing their eggs in the young leaves and
leaf-buds of the oak. The result of their efforts is the
formation of the so-called currant galls, also well known,
4
26 INSECT LIFE
whicli closely simulate red currants. From these galls
emerge males and females of the Gall-fly Sfathogaster
baccarum. After pairing, the females lay their eggs
in the young oak-leaves, and another colony of spangle
galls arises.
The familiar oak-apple is another gall formed by a
Cynipid with alternating generations; its winter form
makes root galls on the same tree, and the insects in
their subterranean home are efficiently protected against
inclement weather. This question of hibernation is

interesting, and the reader who studies the life-histories

given in our pages will soon realize that the winter may
be passed in almost any stage. Even with such delicate,
or apparently delicate, insects as the Butterflies and
Moths, it is easy to select species which winter respectively
in the egg, larval, pupal, and imago stage. Whatever
the stage, it is always well adapted to withstand severe
weather. Either the eggs have tough, hard shells; or the
larvae live underground or in burrows in trees, etc.;
or the pupae are well protected by tough pupal-cases or
warm silken cocoons; or, should the imago itself hiber-
nate, it is either an insect little affected by a fall in
temperature, or it so contrives to hide itself that it is

well protected from the elements.

The weather, however, has a marked influence upon
insect life. The least observant among us cannot fail
to have noticed that the pulse of the insect world quickens
during the warm summer months. Insect life is con-
siderably influenced by its surroundings. Entomologists
have shown that certain Lepidoptera, not long since
considered to be different species, are in reality wet and
dry season forms of the same species, the appearance
 SEASONAL DIMOEPHISM 27

of the adults having been " modified by the cHmatic

environment of the pupa/'
Even our native Lepidoptera show this seasonal
dimorphism, as it is called, to a lesser degree, the spring
brood differing ** slightly but constantly from their
summer offspring." Take the case of any of our Garden
Whites. The wings of the females especially are marked
with black spots. In the spring these spots are grey
or are much reduced, but in the later summer brood the
spots are much darker-coloured and the wings are
yellowish instead of pure white.
Again, Pieris rapce is really the summer form of
Pieris napi, the Green- veined White; in the spring the
greenish veins from which the Butterfly derives its name
are broader and more distinct than in the summer form.
**
The two forms of this insect were discussed by A.
Weismann in his classical work on The Seasonal Dimor-
*

phism of Butterflies.' He tried the effect of artificially

induced cold conditions on the summer pupse of P. napi^
and by keeping a batch for three months at the tempera
ture of freezing water he succeeded in completely
changing every individual of the summer generation
into the winter form. The reverse of this experiment
also was attempted by Weismann. He took a female
of bryonies, an Alpine and Arctic variety of P. napi,
showing in an intensive degree the characters of the
spring brood. The female laid eggs, the caterpillars
from which fed and pupated. The pupse, although
kept through the summer in a hothouse, all produced
typical bryonicB, and none of these, with one exception,
appeared until the next year; for in the Alpine and
Arctic regions this species
"
is only single-brooded
28 INSECT LIFE
Similar experiments were performed with Araschnia
levana, whose summer, more brightly coloured, form is
known as A. prorsa. After refrigerating the summer
pupse, most of the insects appeared as the winter form,
but the converse experiment of warming the winter
pupse failed to convert levana into prorsa. " Weismann
argued from these experiments that the winter form of
these seasonably dimorphic species is in all cases the
older, and that the Butterflies developing within the
summer pupae can be made to revert to the ancestral
condition by repeating the low-temperature stimulus
which always prevailed during the geologically recent
Ice Age/*
 SOCIAL HABITS 29

CHAPTEK II

SOCIAL HABITS, COLOURING OF INSECTS, AND

ECONOMIC QUESTIONS
Social Habits and Guests.
The majority of insects are solitary in their habits; each
individual, or at most a pair of individuals, lives its life
irrespective of the activities of others of its kind. Some
few are gregarious, the Moths
larvse of Processionary
and of many Sawflies, Aphis, and Psocid adults. The
number of social insects can be counted on the fingers
of one hand: they are Bees, Wasps, Termites, and Ants;
and of these, none have carried the social habit to so
high a state as the Ants.
These insects are practically ubiquitous from pole to
;

pole,from the summits of the highest mountains to

sea-level, they may be found. Compared with other
social insects, their colonies are both more populous and
more stable; worker Ants have been known to live for

seven years, and queens more than twice as long. Of

the other social insects, Bee and Wasp colonies "are
merely annual growths," whilst Termites are practically
confined to the tropics.
" Ants have either never acquired, or have completely
abandoned, certain habits which must seriously handicap
the Termites, Social Wasps, and Bees in their struggle
for existence. The Ants neither restrict their diet, like
30 INSECT LIFE
the Termites, to comparatively innutritions substances
such as cellulose, nor, like the Bees, to a very few sub-
stances like the honey and pollen of evanescent flowers,
nor do they build elaborate combs of expensive materials
such as wax. Even paper as a building material has
been very generally outgrown and abandoned by the
Ants. Waxen and paper cells are not easily altered or
repaired, and insects that are wedded to this kind of
architecture not only have to expend much time and
energy in collecting and working up their building
materials, but they are unable to move themselves or
their brood to other when the nest is disturbed,
localities
when the moisture or temperature become unfavourable,
or when the food- supply fails."
Ants, again, have few enemies; true, they are the
hosts of various guests, of which more anon, but of
deadly foes they have few. Forel, the great authority
on these insects, said: "The Ant's most dangerous
enemies are other Ants, just as man's most dangerous
enemies are other men."
Before considering the social habits of Ants, it will be
well to devote some space to one of the most striking
peculiarities of these —
insects their polymorphism.
Strictly speaking, polymorphism means many shapes,
and, equally strictly speaking, all animals exhibit poly-
morphism, no two organisms are precisely alike in
for
every particular. As used here, however, the term is
" merely a synonym of variation," and in its restricted
sense is only to be observed amongst social animals,
" where its existence is commonly attributed to a
physiological division of labour." Wheeler enumerates
no less than twenty-seven polymorphic forms of Ants;
 ANT COLONIES 31

needless to say, these forms never all occur in one colony,

nor are they to be found in any one species. It is quite
common, however, more
to find five polymorphic forms,
usually called "castes," in one Ant community; they
are winged males and winged females, major and minor
workers, females so named on account of their size, and
soldiers —
workers specially adapted to undertake any
fighting that may be necessary. Another interesting
*'
caste," only found in a limited number of species, is

known as " nasuti." The function of the nasuti, or

nosed ones, is to build the nests and repair them when

In describing the typical Ant colony, it must always

be borne in mind that the habits of Ants vary tremen-
dously —in fact, no two species have precisely similar
habits . Our description therefore ,
, is one of generalities
and appUes only to the ground-nesting species.
In colonies where there are winged males and females
pairing, with rare exceptions, takes place in the air
during a nuptial flight. This is always a period of the
greatest excitement; even the wingless workers come to
the surface along with the winged males and females.
*'
The winged forms move about in tremulous indecision,
but finally venture forth, run about on the stones or
climb about on the grass-blades till they have filled

their trachese with a plentiful supply of oxygen. Then

they spread their wings, and are soon lost to view high
in the air."
Although the performance is comparable to the
swarming of Bees, there are several important differences.
In a Bee-swarm there is only a single female, here there
are many; the female Ant rarely returns to the colony
32 INSECT LIFE
in which she was born; in both cases, however, tlie males
die down after pairing.
Wrhen the earth is reached once more, the fertihzed
queen detaches her vnngs by rubbing them against grass-
blades or stones, by pulHng them ofi with her legs, or
even biting them off. Having divested herself of wings,
which henceforth would be useless to her, she makes a
short burrow which terminates in a chamber; then she
closes the mouth of the burrow. " The labour of
excavating often wears away all her mandibular teeth,
rubs the hairs from her body, and mars her burnished or
sculptured armour, thus producing a number of mutila-
tions, which though occurring generation after generation
in species that nest in hard, stony soil, are, of course,
never inherited."
In the chamber she has made, the queen awaits the
maturation of the eggs, which takes place at the expense
of her fat body and degenerating wang- muscles. She
may have to waitmonths before they are ready to be
laid, but eventually she oviposits, her eggs being fertilized
by spermatozoa stored in her spermatheca since the
nuptial flight. The eggs are tended by the queen till

they hatch as minute larvae; then she feeds them with

a secretion of her salivary glands, derived from the same
source as the eggs themselves —from her fat body and
wing- muscles. These larvae dif!er from those hatched
later,they grow very slowly, pupate before their time,
and give rise to very small workers. " In some species
it takes fully ten months to bring such a brood of minim

workers to maturity, and during all this time the queen

takes no nourishment, but merely draws on her reserve
tissues.*'
 ANT COLONIES 33

These small workers do not belie their name they soon :

" get busy "; they break down the entrance to the nest;
they build other chambers and galleries they sally forth ;

to hunt for food for themselves and the exhausted queen.

She in her turn changes her nature from this point; she
no longer takes any interest in her progeny, but leaves
them to the care of the workers, and limits " herself to the
laying of eggs and imbibing liquid food from the tongues
of her attendants. . . . With this circumscribed
activity she lives on, sometimes to an age of fifteen years,
as amere egg-laying machine."
The later broods of larvae, as we have said, are tended
by the early workers, but when the colony is in going
order each worker has her appointed duties to perform.
Some act as nurses; they feed and clean the young;
they also transport them from one part of the nest to
another according to the varying humidity and tempera-
ture of the different galleries. Also, in the event of the
nest being broken open or of an attack by some other
species, the workers remove the eggs, larvae, and pupae
to a place of safety. " This freedom in dealing with the
brood is certainly one of the most striking manifestations
of the plasticity of Ants.""
It is very unusual for the immature Ants to be brought
into the light; apart from other considerations, workers
always remove the brood to the dark recesses of the nest
when an accident befalls it. Wheeler however says that , ,

in the dry deserts of Western Texas, he has seen Ishno-

myrmex cocJcerelli bring its larvse and pupae out on to
the large crater of the nest about 9 p.m., and carry them
leisurely to and fro much as human nurses wheel their
charges about the city parks in the cool of the evening.
5
34 INSECT LIFE
The workers carry out their duties solely by their

highly developed tactile and olfactory senses. The

brood, eggs, larvae, and pupae are arranged in groups
according to their age and condition. During the
warmer hours of the day the brood is brought nearer
to the surface of the soil; at night it is removed to the
deeper recesses of the nest. As Ants' eggs are very
minute, hardly surprising to learn that they are not
it is

carried about separately; the workers constantly lick

the eggs, and this causes them to adhere together in
little packets; their saliva may have a further use in
preventing the growth of moulds.
The very soft and white, almost transparent
larvae are
"
—in shape they resemble a " crook-necked
fact, in
gourd, the curved end terminating in the head; of eyes
and legs they have none, but they are usually hairy.
The hairs probably serve a number of ends; they prevent
the delicate skin of the larva from coming in contact
with the moist soil ; they are a protection against assault
by other larvae, and they hold their owners together in
packets and thus assist transport by the workers.
The feeding of the larvae is carried out by the workers,
and according to many authorities " the quantity or
quality of the food, or both, determines whether the larva
hatching from a fertilized egg shall become a worker or
a female." The food supplied to the larvae varies
according to the species; many species feed their larvae
solely upon regurgitated food; some feed them upon
solid food, portions of insects, or in the case of the
Harvesting Ants, portions of seeds and the Fungus-
growing Ants on fungus hjrphae; some species, again,
feed their larvae on both solid and regurgitated food
 ANT COLONIES 85

Many Ant larvse pupate without spinning any cocoon;

other species, however, spin silken cocoons, but they
are unable to do so without assistance from the workers.
The can only perform the operation if they are
larvse
buried in the earth or covered by soil, that there may be
a solid foundation to which they can attach their silk.

The workers, bury their charges, await the

therefore,
spinning of the cocoons and unearth them again. These
,

cocoons, by the way, are the commodity usually sold

as ants' eggs for the purpose of feeding fish, cage birds,
etc. When the time arrives for the adult to emerge,
the workers once more lend their aid; they cut open
part of the lower surface of the cocoon, draw out the
contained insect, and strip the inner skin from its body,
antennae, and legs. At first the adult Ant is pale in
colour, and is known as a " Callow.'*
Briefly, this is the history of a typical Ant colony.
Wheeler, in his work on Anta, whence much of our
information is derived, gives an excellent account of
the doings of these interesting insects, with details of
the peculiarities of different species which depart from
the normal.
Symbiosis among insects is nowhere better illustrated
than by certain social species, and the Ants have raised
the practice of living with other species — for that is what
symbiosis means —to a very high standard. For pur-
poses of convenience, at any rate, the symbiosis of Ants
may be considered from two points of view. First there
are those cases in which Ants, of their own accord, gather
together a varied assortment of insects, Green-fly,
Scale-insects, Plant-lice, and the hke —insects upon
which the Ants are almost parasitic. Then there are
36 INSECT LIFE
insects which, without encouragement from their hosts,
settle themselves to within an Ants* nest. Insects
life

of the first category all excrete honey-dew, a sweet

liquid which is eagerly devoured by Ants; in return, the
Ants perform certain services for their captives, so that
this is more nearly true symbiosis than is the case with
the insects in the second category, who, in many cases,
do not benefit or may even harm their captors.
On a later page we have mentioned briefly the relation-
ship of Ants to A f hides. A few more details may
fittingly It perhaps occasions some
be included here.
surprise that any Ants should trouble with insects so
small as Af hides, whose yield of honey-dew, one would
thinl?:, could not be excessive; but recent investigations
show that a Maple Aphis will secrete forty-eight drops
of the liquid in twenty-four hours. " A drove of
Aphids, especially when it is young and
stationed on
succulent leaves or twigs, may produce enough honey-
dew to feed a whole colony of Ants for a considerable
period. Huber has observed the method by which
the Ants procure their honey-dew from the Aphids;
we have not space to quote his words, but the usual
proceeding is for the Ant to stroke the abdomen of the
Aphis with its antennae, and the latter voids the sugary
liquid. When the Ants neglect their charges, the latter
void their excretion on to the plant without any assist-
ance; should the Ants, however, become too pressing
Aphids become exhausted and
in their attentions, the
can yield no more nutriment but the Aphids are by no
;

means parsimonious, and if they have anything to give,

never fail to respond to the Ants' solicitations.
With regard to the excretion of honey-dew very many
 ANTS AND APHIDS 37

erroneous statements have been made, and some of

them have found their way into scientific literature.
On the sides of the sixth abdominal segment of many
Aphids there is a pair of protuberances, called " siphons/'
Linnaeus stated, and others have copied his statement,
that the Ants derive their honey-dew from the siphons
the liquid, however, is the excrement of the insects, and
does not come from the siphons.
Biisgen, in describing the attack of a Lacewing larva
on an Aphis, pointed out the use of the siphons to their
owners. " When the attack," he says, " happens to be
rather awkward, the Aphid has time to smear the
secretion,which is at once discharged from the siphons,
over the face and forceps of the larva, which is thus, at
least temporarily, disconcerted and frightened. . . .

The secretion hardens on the larva immediately, and

thus forms a most uncomfortable coating, causing the
creature to desist from the chase while it cleanses its
forceps and forehead. This consumes time, and can
only be accomplished by the Aphis-lions seizing some
slender object, like the tooth of a leaf, for the purpose
of rubbing off the secretion." Another authority has
shown that the siphons are more highly developed
amongst those Aphids that live singly and not in droves,
and are not attended by Ants; in such circumstances
there is more risk of attack.
The relations of Ants to Coccidce are very similar to
their relations to Afhidw. The Psyllidce, which void
both soHd and liquid honey-dew, are closely attended by
Ants, and in some cases are protected under sheds built
by these insects. Wheeler sums up the relationship
with Ants and Aphids very concisely. On the part of
38 INSECT LIFE
the Aphids, he says that they do not attempt to escape
from or defend themselves against the Ants; they yield
their honey-dew gradually, and some species, habitually
dwelling with Ants, have developed a circlet of hairs to
support the sweet drops till they can be imbibed by the
Ants. Aphids attended by Ants extract more plant-
juices than unattended individuals, and the reduction
of the protective siphons is usually more marked in
those species which are visited by Ants. Ants, on their
part, never kill Aphids as they do other defenceless
insects they stroke their charges in a particular manner
;

to make them yield their liquid store ; they protect their

charges, and even carry them to a place of safety when
danger threatens; also, not only the adults, but even
their progeny, eggs, and larvae, are cared for by the Ants.
More remarkable than any of the cases just described
is the fact that Ants are known to attend the larvae of
no than sixty-five species of LyccenidcB, or " Blues,""
less
representing twenty-nine genera. Twenty-three of these
species belong to Lyccena. These larvae, as all Lepidop-
terists know, are rounded at their head and tail ends,
somewhat depressed, and clothed with fine hairs. In
the case of Lyccena hcetica, there is a median dorsal
gland on the eleventh segment, and a pair of protrusile
tentacles on the twelfth. The median gland can be
protruded through a transverse slit, and the tips of the
tentacles are fringed with stiff hairs. The Ants caress
the flattened posterior of the larva and a drop of
colourless liquid is given off by the median gland; this
is evidently relished by the larva's attendants. The
tentacles probably give off an odour which is attractive
to the Ants, but this has never been shown of a certainty.
 ANT GUESTS 39

There are a few other insects to which Ants pay more

or less assiduous attention; butwe have briefly outlined
the more important. In every case the insects upon
which so much care is lavished are those which have the
power of yielding some sugary liquid, in return for the
attention bestowed upon them.
It has been truly said that " Ants have such a plastic
organization that they are not only able to assume an
active role towards the Aphids and a passive role
towards the Myrmecophiles, or Ant guests, but they may
even enter into manifold active and passive symbiotic
relations to other species of Ants.'' Their relations with
Aphids have been considered; those with other insects
may here have some attention. That the subject can
only be dealt with cursorily here is evident from the
fact that there are known to be at least fifteen hundred
species of Myrmecophilous insects, one thousand of them
being Beetles. The Coleoptera mainly belong to the
StaphylinidcB, Pselaphidw, Pamsidce, and Histeridw.
Wheeler supposed that this extraordinary number of
Ant guests arises from the fact that their hosts' nests
are usually permanent abodes, at a higher temperature
than the surrounding soil that there is plenty of refuse
;

food and fresh fare in the shape of larvae and pupse that
;

the Ants protect their guests in protecting themselves;

and that they are always ready to lavish their affections
upon any insects that resemble their larvae.
Many of the guests closely resemble their hosts; by so
doing they probably avoid the fate that should justly
befall them. The Black Kove Beetle, Myrmedonia
funesta, is of the same colour as its host Lasius fuli-
ginosus ; the black and red M. humeralis simulates
40 INSECT LIFE
Formica rufa, with which it dwells. These Beetles
live on dead or dying Ants, and luik near the entrance
to the nest to destroy solitary individuals coming in or
going out. Five or six Beetles will fall upon a single
Ant, " tear her limb from limb, and then quarrel with
one another over the fragments, like a pack of hungry
hounds. The Ants detest these jackals, and rush at
them with open jaws; but the latter merely turn up
their flexible tails and emit a disagreeable secretion.'"

Certain Ant guest Beetles of the genus Clythra only

dwell with their hosts in the larval stage, but they are
cunning individuals. They build cases in which to
dwell, and then, when they are hungry, withdraw their
heads within the case. The worker Ants, ever watchful
for convenient hiding-places in which to store their egg-
packets, deposit them within an apparently empty case.
The Clythra larva wastes no time in devouring the meal
so obligingly placed before it.

Few Ant guests are more crafty than a little Lepismid

Atelura formicaria. This creature is very similar to
its near ally the Silver Fish; it does not seem to be a

welcome guest, Ants often make attacks upon it,

for the
but, being exceedingly agile, it rarely comes to any harm.
In our chapter on Ants we have mentioned the common
practice of one Ant feeding another by passing regurgi-
tated food from mouth to mouth. This is Atelura'
opportunity for appeasing its hunger when two Ants are
;

face to face and about to pass the sugary Hquid, their

guest glides up with astonishing rapidity, steals the drop
as it passes, and makes off.
Certain wingless Crickets of the genus Myrmecofhila
live on the oily secretions from the bodies of their hosts.
 ANT GUESTS 41

The Cricket nibbles the legs of the Ant and seems to

delight in so doing. ** At first the Ant disregards this
nibbling, which probably resembles the attentions of
the toilet habitually received from sister Ants; but the
Cricket's scraping mandibles soon grow to be annoying,
and the Ant either moves away or turns her head,
opens her mandibles, and makes a lunge at the Myrme-
copJiila, like a large dog annoyed by a puppy. For . . .

obvious reasons, the Cricket avoids nibbling at or even

approaching the Ant's head. It is always alert, as if
perpetually aware of danger, and ready to dodge at the
slightest movement of the Ant."
The Crickets may also be observed nibbling at the
walls of the nests probably they derive therefrom
; some
greasy matter rubbed from the bodies of passing Ants.
Certain minute Cockroaches, of the genus Attaphila,
dwell in the nests of fungus-growing Ants, and, in habit,
closely resemble Myrmecophila . They, however, live on
friendly terms with their hosts and climb upon their
heads and backs in search of nutriment, an event
rendered the more strange because they are the only
known to live on intimate terms with these Ants.
insects
Of the true Ant guests, as distinguished from the
tolerated or persecuted guests already mentioned, we
have Uttle space with which to deal. They are Beetles
for the most part; in colour they are usually red, and
they frequently bear tufts of yellow or red hairs, which
are licked by the Ants with evident dehght. Wasmann
believes that the Ants are so fond of the secretion from
these hairs ** that it must affect them very much as a
good cigar affects a smoker.'*
Many of the guests are moved from place to place in
6
42 INSECT LIFE
the nest by their hosts, usually by pulling at their legs
or antennsB, fed with regurgitated food, licked and
fondled as though they were blood relations of the
members of the colony. The Staphyhnids of the genus
Atemeles and Lomechusa are especially favoured, for not
only are the adults carefully tended, but their larvse are
treated in every respect with the same attention as their
hosts' larvae.
Concerning the true parasites, whose energies are
devoted to thinning the ranks of the Ant colonies, we
have no space to deal with them; nor can we describe
in these pages of the many Ant species which dwell
any
together in perfectharmony and to their mutual advan-
tage. Perhaps it is natural, but we are conscious of
the fact that these insects have already absorbed more
than their duly allotted space in our pages.

The Colours of Insects and Mimicry.

It is not necessary to have studied entomology very
deeply to be aware of the fact that the colours of insects,
in the majority of cases, harmonize so nicely with their
owner's usual surroundings as to render him more or
less inconspicuous, or, on the contrary, are so brilliant
that he forces himself upon one's attention. Both
descriptions of colouring have their uses in the insect
economy; let us consider them in their order.
Colours which harmonize mth an insect's environment
are usually designed for purposes of concealment; they
render their owner inconspicuous, and on this account
they are called " protective." In many cases protective
resemblance is a better term than protective colouring,
 PROTECTIVE RESEMBLANCE 43

for often tliere is a similarity of form as well as colour

between the insect and its surroundings.
No better examples of protective resemblance can be
found in the insect world than is exhibited by the Leaf
Butterflies of the genus Kallima; when at rest, these
insects are almost indistinguishable from the surrounding
leaves. Certain of our native Lepidoptem exhibit pro-
tective resemblance in a minor degree. The Green
Hair streak, Thecla ruhi, is dingy brown on its upper
surface, but when it settles on green herbage, with its
wings folded, its emerald lower surface efficiently matches
the verdure. To the tropics, however, we must turn
once more for really striking examples. The female
Leaf Insect, PhylUum crurifoUum, is almost as perfect
in its protective resemblance as the Leaf Butterfly, but
whereas the latter simulates a dead leaf, the former has
the colour and form of a green leaf. These insects
(described on p. 90) have been known to bite pieces from
the tegmina of their sisters; can they themselves be
deceived ? It is remarkable, at any rate, that their
attacks upon one another are always confined to the
leaf-like portions of their bodies. Of the Stick insects
and the Geometrid larvse, which resemble twigs, we have
spoken elsewhere.
Bastin, in his book "Insects," describes an interest-
ing case of protective resemblance observed by Pro-
fessor Gregory in the Great Rift Valley. He says:
**
The insect in question is a species of Flata—a genus
comprised in the family Fulgoridce. It is found in
British East Africa, and is dimorphic, a certain number
of individuals being bright pink in colour, while others
are bright green. The insects frequent the stems of
44 INSECT LIFE
plants, from which they suck the sap; and the order of
their grouping is very remarkable. The pink ones sit
upon the lower part of the stem, while the green ones
take up positions above, towards the extremity. More-
—
over, the developing larvae which secrete long waxy
filaments, and are quaint, fluffy objects quite unlike
their parents — sit beneath the pink individuals at the
lowest part of the stem. In this way the exact appear-
ance of a spiked inflorescence, such as that of the fox-
glove, is produced. The fluffy larvae look like seeds;
the pink individuals resemble drooping flowers; while
the green ones, higher up the stem, play the part of so
many unopened buds. Professor Gregory was completely
deceived by the first cluster he saw, and attempted
to gather it, when the mock flowers and buds jumped off
in all directions.'"
Other examples of protective resemblance are easily
discovered. There are Beetles that resemble tufts of
lichenand those that resemble larval excrement, to
mention but two from one order.
Protective colouring, as distinct from resemblance, is

far more common, and there are examples on every side.

The green larva feeding on a green leaf is so coloured,
but there are more subtle forms than this. Amongst
the Lefidoftera we have the larvae of the Pine Beauty
Moth, Panolis pini'perda. Away from their food-plant,
the pine, they are striking-looking green insects with two
dorsi-lateral white lines; when feeding on the pine
needles, they harmonize so admirably with their sur-
roundings that they are difficult for bird or man to
discover. Another green-striped white larva, that of
the Privet Hawk Moth, S'phinx ligustri, is even more
 PROTECTIVE COLOURING 45

conspicuous when viewed in the hand, but, large though

it is when fully fed, it harmonizes well with its food-plant,
the privet.
Not only the colouring, but the light and shade upon
an insect assist in rendering it inconspicuous. In this
connection we may well quote Professor Poulton upon
the pupa of the Purple Emperor, Apatum iris: "The
most extraordinary thing about this resemblance is the
impression of leaf -like flatness conveyed by a chrysalis,
which is in reality very far from flat. In its thickest
part the pupa is 8-5 millimetres across, and it is in all
parts very many times thicker than a leaf. The dorsal
side of the pupa forms a very thin, sharp ridge for part
of its length, but the slope is much more pronounced in
other parts and along the whole ventral side. But
exactly in these places, where the obvious thickness
would destroy the resemblance to a leaf, the whole effect
of the roundness is neutralized by increased lightness,
so disposed as just to compensate for the shadow by
which alone we judge of the roundness of small objects.
The degree of whiteness is produced by the relative
abundance of white dots and a fine white marbling of
the surface which is everywhere present mingled with
the green. The effect is, in fact,produced by a process
exactly analogous to stippling. The degree of lightness
produced in this way exactly corresponds to the angle
of the slope, which, of course, determines the depth of
the shadow. By this beautiful and simple method the
pupa appears to be as flat as a leaf which is only a small
fraction of 1 millimetre in thickness."
The protective colouring of certain Lepidopterous
larvae varies with their surroundings; thus, the larvae of
46 INSECT LIFE
the Peppered Moth, Amphydasis hetularia — ^larvae of one
brood, when upon green leaves, become green in
fed
colour; others of the same brood and fed in a similar
manner, when compelled to live upon brown twigs, in
nearly every case became dark brown.
There are insects, too, which, apparently instinctively,
seek to hide themselves where they are least likely to be
observed .The Cotton Boll Weevil Anthonomus grandis
,
,

is a case in point.Of a dull earthen brown, this Weevil

is by no means difficult to detect as it climbs over the
cotton plants. In the presence of danger it at once
drops to the earth, a common Weevil habit, by the way,
and so closely resembles its surroundings that it is easily
overlooked. This but one example of hundreds.
is

Many Lepidoptera when at rest, so arrange their wings

,

that their colouring may afford them the maximum of

protection. Species with brightly coloured hind- wings
but sombre fore-wings will invariably be found resting
on some lichen-covered post or tree or a rock, with their
wings so folded that the bright colours are hidden from
view. Species whose under-sides harmonize with their
surroundings rest with the upper surfaces of their wings
in contact, so that only the lower surfaces can be seen.
Other species, if upper surfaces afford the best
their
protection, sleep with their wings horizontal, and there
is a case on record in which one species of Butterfly rests

in one district with its wings vertical and in another

district with them horizontal, for the evident reason
that the positions it has chosen afford the best protective
colouring for the respective districts.
Many larvae spinning silken cocoons have the power
of making the colour of the silk approximate closely to
 MIMICRY 47

that of their surroundings. With all their wonderful

protective colouring, however, no adult insects have the
power of varying their colours at will to suit their environ-
ment, after the manner of chameleons.
The brightly coloured, conspicuous insects mentioned
at the beginning of the chapter are to be found every-
where. What is the object of their brilliant colouring ?

A few words will suffice to explain. Their ornate hues

are designated warning colours for the reason that in
almost every case the brightly coloured insect is un-
palatable . Animals of various kinds , insectivorous birds
reptiles,and the like, all avoid the brightly coloured
insect as an article of diet. Many of these insects emit
noxious acid or alkaline substances when touched, and
the young predator, whatever be his kind, soon learns
by experience to avoid such bedecked individuals
Bright colours are not an absolute protection to every
individual, for animals only learn by experience, and
many insects are sacrificed that the majority may enjoy
immunity.
Mimicry is another form worthy of
of colouring
consideration. Critics willremark that
decry the
mimicry is a form of colouring, but that is all it amounts
to in many cases Usually however in cases of mimicry
. , ,

form and colour go together. The object of mimicry

appears to be either protective or aggressive : protective
if the weaker, harmless insect mimics some more power-
ful species; aggressive if a predatory species mimics the
insectsupon which it preys.
Examples of protective mimicry are not hard to find.
The Wasp Beetles mimic Wasps very closely in colour,
and to some extent in form; we have a common British
48 INSECT LIFE
species, Clytus arietis. There is, however, an exotic
species which mimicry much further, for,
carries its
in addition to its black and yellow colouring, its two
membranous wings are so deeply indented that they
closely resemble the four wings of a Wasp. Our Hornet
Clearwing Moth, Trochilium crahroniformis, ca.n hardly be
excelled as an example of protective mimicry, for its

resemblance to the Hornet Vespa crabro could hardly

be more perfect in an unrelated insect. Many other
examples are mentioned in our pages; in every case the
mimic is benefited by its resemblance to a more aggres-
sive species or to a distasteful species. Experience has
taught the animal world in general that such species
are best left alone; the mimic therefore shares in the
comparative immunity enjoyed by the species it simu-
lates.
On looking for the first time at any extensive collection
of insects of various orders, the observant entomologist
will notice that over and over again the same colour-
schemes are repeated in widely separated families
or even orders. The resemblances of one group to
another cannot be designated mimicry, and the matter
has been summarized by Professor Meldola as follows:
" From groups of species within the same order, such as
Butterflies and Moths, groups of different genera of
Wasps and so forth, we can gather a more
or Beetles,
widely abstract idea of types of warning colours common
to whole tribes of insects, irrespective of the orders to
which they belong. In other words, we can discern
over and above the actual mimetic resemblance, which
may be more or less exact, a kind of general similarity
in design which suggests that certain types of patterns
 MIMICEY 49

have been fixed by the action of natural selection as

outward and visible signs of distastefulness. Thus, the
yellow and black banded pattern so frequently observed
in Wasps, Flies, Beetles, etc., is a very good example of a
common warning type of pattern ... it is only neces-
sary to add that from the insects inhabiting one district
it is often possible to detect similar arrangements of
colour and marking among Beetles of various families.
Flies, Wasps and Bees, Bugs and Moths a most hetero- —
geneous assemblage of orders, none of the species being
exact mimics of each other, and yet all presenting a
general uniformity of colouring and pattern.'*
Aggressive mimicry is perhaps not quite so frequently
met with as protective; still, it is common enough to
be observed without much difficulty. Amongst the
some of the most striking examples
Eobber-flies, ^s^7^£?CB,
occur. Deromyia annulata bears a striking resemblance
to the solitary Wasp, PoUstes metricus; Bumble Bees are
simulated by Robber-flies of the genera Mallofhora and
—
Dasylis in fact, to such lengths is the mimicry carried
in the former genus, that the hind-legs of the FHes
resemble the pollen-bearing legs of the Bees. Many
other examples could be quoted from the Robber-flies.
The little Sphegid, Oxyhelus uniglumis (see p. 268)
closely resembles, in appearance and habits, the Flies
upon which she preys. In every case of aggressive
mimicry the resemblance of predator to prey is of
service to the former ; it enables him to go amongst his
prey without arousing suspicion, and to capture them
without undue effort. It is only fltting to remark that
there are those who will have none of the theory of
aggressive mimicry. They argue that insects so well
7
50 INSECT LIFE
endowed for tte capture of their prey as are most of
these insects require no adventitious aid, but that their
mimicry serves to protect them from still more powerful
predators. We would remark, however, that the
African native who, when hunting, covers himself with
a skin, does so in order that he may approach nearer to
his quarry, not that he may be protected from some
unknown enemy, or, as Howard remarks, " We should
not fear grizzly bear if they looked like peaceable
human beings/'
Not all of the aggressive mimics are active insects like
the Eobber-flies and Oxyhelus; certain flower-like Mantids
are also mimics of this type. Nearly all species of
Mantis closely resemble their usual surroundings in
colour; thus, thebrown Mantids frequent brown vegeta-
tion, the green ones lurk on green leaves; but there are
much more subtle mimics in the family than this.
Hymenofus bicornis, a pink-and- white Mantid with
flattened legs, is sufficiently flower-like to deceive nectar-
seeking insects; Dolium diaholicnm, with four green legs
and purple-and- white and prothorax, is equally
fore-legs
deceptive to The Indian Mantid, Gongylus
insects.
gongyloides, however, carries its mimicry further, and
has been thus described from living specimens ** On :

looking at the insects from above they did not exhibit

any very striking features beyond the leaf-like appen-
dages of the limbs, both of which, like the upper surface
of the insect, are coloured green; but on turning to the
under-surface the aspect is entirely different. The
leaf-like expansion of the prothorax, instead of being
green, is a clear, pale lavender-violet, with a faint pink
bloom along the edges of the leaf, so that this position
 HAKMFUL INSECTS 51

of the insect has the exact appearance of the corolla of

a plant, a floral simulation which is perfected by the
presence of a dark, blackish -brown spot in the centre,
over the prothorax, which mimics the opening to the
tube of a corolla. A favourite position of this insect is

to hang head downwards among a mass of green foliage,

and, when it does so, it generally remains almost motion-
less,but at intervals evinces a swaying movement as of
a flower touched by a gentle breeze while in this attitude,;

with its fore-limbs banded violet and black, and drawn

up in front of the centre of the corolla, the simulation
of a papilionaceous flower is complete. The object of
the bright colouring of the under-surface of the pro-
thoracic expansion is evident, its purpose being to act
as a decoy to insects, which, mistaking it for a corolla,
fly directly into the expectant, serrated, sabre-like
raptorial arms of the simulator."

Economic Questions.
Frequently we read of plagues of Caterpillars, which
devour every green thing as they advance like a destroy-
ing host; more frequently tidings reach us of some
infantile epidemic which carries off young lives by
hundreds. Do we ever give the matter a second thought
unless it is brought home to us by personal loss ? What
matters it that Antler Moth larvae are destroying the
herbage on the Cumberland fells ? Cumberland is far
away. As for infantile diseases, how are they connected
with entomology, anyway ? The ordinary man, the
well-educated man, has much to learn of insects, if he
would play his part in making our land more habitable.
What is true of Britain is doubly true of the tropics.
52 INSECT LIFE
Here the insect menace is bad enough; in tropical
countries, where insect life attains its zenith, the matter
is far more urgent.

From an economic point of view insects may be

divided into two groups. There are insects which
damage crops, either by using them or by
as food
destroying them for and the like.
nesting purposes
There are also insects which carry disease, from man to
man, from animals to man, and from animal to animal.
Examples of these destructive insects are mentioned
here and there in our pages, but now we propose to
review some of the more noxious, and to learn a little
of their machinations.
The crop pests are countless. Every herbivorous
insect might be described as noxious; the very fact that
it eats vegetation is proof that it does harm, unless it

be such an exceptional creature that it confines its

attentions to noxious plants. The entomologist, how-
ever, is judgment; no insect is considered
fair in his
injurious unless by weight of numbers it does serious
damage. The larvae of the SwaUow-tail Butterfly,
Papilio machaon, feed upon the leaves of carrot, parsley,
celery, fennel, and the like, but they are not common
enough in this country to be classed as injurious
insects. For the same reason, no one could consider
the larvae of the Death 's-Head Hawk Moth, Acherontia
atropos, to be injurious, though they feed upon potato-
leaves.
Crop pests are mainly confined to the Lepidoptera,
Orthoptem, Coleoptera, Diptera, Hymenoptera, Thysanop-
tera, and Rhynchota, a formidable array, to be sure,
to which we may add the Isoptera, for we use the word
 HARMFUL INSECTS 53

"crop'* in its widest sense, to mean any vegetation

grown by man for his benefit.
The Lepidoptera may be considered as the most
generally injurious. The adult insects are incapable
of doing any damage; none of them have mouth-parts
designed for biting, so they could do no harm if they
would. Moths are the chief offenders, though our
common " Whites," Pieris spp., are injurious to a limited

extent.
Amongst the Noctuidw there are many noxious species.
The larvae of nmny of these Moths, known in America
as Cut- worms, hide beneath the soil by day and sally
forth at night to feed; hence they are very difficult to
deal with, and may be present in considerable numbers
before the husbandman is aware of their presence.
Other damage done by Lepidopterous larvae consists
in defoliating trees and shrubs. Notorious species with
this habit are mainly members of the GeometridcB but ,

it is by no means confined to this family, for several

of the LymantridcB are voracious leaf-eaters. The

CossidcB are noted wood-borers in their larval stages,
and their immature existence is so prolonged that
they are more harmful than insects of similar habit
with a less extended life-cycle. Wood-boring larvae
also occur among the Sesiidce, and many of them are
capable of doing considerable harm.
Another description of injury, very common amongst
certain Lepidoptera, iscaused by the larval habit of
leaf-mining; the TineidcB are the chief offenders. Lastly
there are the destructive leaf -rollers of the Tortricidw,
and the obnoxious " tent-makers," also mainly Tineidce.
There are certain Lepidoptera which cannot accurately
54 INSECT LIFE
be described as pests of crops, yet must be mentioned
here, for they can still less be classified with the disease-
carriers. Eeference is made to such species as the
Clothes Moths of the Tineidce, Moths with grain-eating
larvae of the PyralidcB, and the Bee Moths.
when they
Orthoptera are unsurpassed as crop pests
descend upon their feeding-grounds in thousands, a
habit common to several species of Acridiidce. Certain
of the Phasmidce are destructive to coconut-trees, and
for the rest many Gryllidce are minor pests, and all

BlattidcB are obnoxious soilers of food.

The numerous as
injurious Coleoptera are nearly as
the Lepidopiera. Wood-borers there are in plenty
amongst the Scolytidce, BostrychidcB, Lucanidce, Ceram-
bycidcB, and Lamiidm, to mention a few families. The
leaf-eaters are almost as numerous; ChrysomelidcB,
HaliicidcB, and Galerucidce are the worst offenders, not
forgetting a large number of the CurculionidcB. Then
there are many species whose larvae live for long periods
underground, and levy toll upon the roots of growing
plants; MelolontJddcB, RutelidcB, Dynastidce, Cetoniidce^
and ElateridcB are the offenders here. There are
ravagers of stored grain amongst the Curculionidce, the
TenebrionidcB, and other families. There are twig-
girdlersamongst the Bwprestidw creatures of evil habit
,

who kill the twigs of trees by eating away circular strips

of bark. There are Lamiidce of almost similar habit
who prune the twigs instead of ringing them. The evil
ways of many Coleoptera are too diverse to be recounted
in detail.
Amongst the Diptera there are TipulidcB with sub-
terranean root-feeding larvae. There are root and stem
 HAKMFUL INSECTS 55

feeding larvae and leaf-miners too, but it is mainly on

the medical —or shall we say disease-bearing —side that
Diftera make their presence felt.
The Hymenoftera are notorious as crop pests, almost
solely on account of the damage done by Tenthredinidce
larvae. To a lesser degree, the Siricidce, with wood-
boring larvae; the Cephidae, with larvae which tunnel in
smaller stems; and the gall-forming CynipidOy, are
noxious.
The Thysanoftera are almost all of them injurious
to growing crops, whilst the Rhynchota include some of
the most harmful of all insects. With a few a very —
—
few exceptions, all the CoccidcB are noxious; there is
probably no family containing so many injurious species:
the AphidcB are a good second. The Cotton-stainers
of the genus Dysdercus are dreaded in every cotton-
growing district. The Aleurodidce and PsylUdcB con-
tain more harmful than harmless species. The TingidcB
and JassidcB are harmful in a minor degree, a remark
which applies to some of the Capsidw. From their
egg-laying habits the Cicadidw cause indirect injury, and
the leaf-eating species of Pentatomidm are not above
suspicion.
Before passing to the medical aspect of economic
entomology, let us see whether there is not a ray of hope
amongst the wreckage. It is cheering to be reminded
that nearly all these evil-doers have enemies amongst
their own kind, often very closely related enemies.
They belong, for the most part, to the Hymenoptera
Diptera, Coleoptera, Odonata, Planipennia, and Rhyn-
chota.
Many Hymenoptera live at the expense of other
56 INSECT LIFE
insects. The IchneumonidcB, Brachonidce, and Chalci-
didw, and in a lesser degree the Evaniidce and Procto-
trypidcB, do immense service to mankind in keeping the
numbers of noxious insects within reasonable bounds.
In addition, there are many predators, such as the
Fossorial Wasps, the Social Wasps, and the Ants, who
levy no small toll on the insect world.
Several Di-ptera are parasitic, notably the TachmidcB,
and of predators none are more energetic or voracious
than the AsilidcB.
The friendly Coleoptera form a limited band. Pride
of place must be awarded to the CoccinellidcB, who in
their varied species wage continual warfare upon
AfhidcB, Coccidce, and the like. Then there are pre-
datory species of Carabidw —
a few species are plant-
feeders —and the still more useful CicindelidcB.
The Odonata, as an order, are useful; they all devour
insect fare, and most of them are indefatigable in their
search for food.
The Planipennia include the Chrysopidce, those in-
veterate enemies of Afliidce; and amongst the Rhynchota
there aresome carnivorous species, mostly Reduviidce^
which do some duty towards maintaining the balance
of Nature.
The disease-bearing insects are confined to four
orders Diptera Siphonapera Anoplura, and Rhynchota;
, ,

nevertheless, they are all too numerous.

Amongst the Diptera we find the largest number of
blood-sucking insects which affect man and his belong-
ings . The CuUcidce , in the main are harmful and
, , all are
annoying. Malaria and yellow fever are transmitted
by these insects. The Muscidm are equally objection-
 HAKMFUL INSECTS 57

able the House-fly

; is responsible for tlie spread of several
diseases. The Tsetse-flies transmit sleeping sickness
and an allied disease to animals. The SimulidcB are
more than suspected of conveying pellagra, and certain
Psychodidce of performing the same office for the un-
known germs of three-day fever. The TabanidcB, too,
are under suspicion in connection with the transmission
of disease. The (Estridw are all of them noxious to
animals, though not disease-carriers. Other parasitic
Diftera occur in the Hiffohoscidce and alhed famihea
in the Muscidw and Sarcophagidce, species of some of
these two families being parasitic on man.
Certain species of the Sifhonaftera are notorious as
vectors of the plague bacillus ; other species are internal
parasites of men and animals; most species are annoying
partial parasites.
The Anoflura include disgusting, disease-bearing
human and the Rhynchota are notorious
parasites,
because they include the Cimicidce, of which family the
common Bed-bug, suspected of transmitting recurrent
fever, and a disgusting creature at best, is a member.
These insects, in common with their crop-devouring
relations, have their enemies, both parasitic and pre-
datory; were it not so, there would be no place for man
upon this earth.
There are a certain number of insects from which
we derive direct benefit; they can almost be counted
upon the fingers of one hand. True, the enemies of our
enemies —insect allies they may be termed — ^are beneficial
to us but indirectly.
The Silkworm and the Honey Bee, semi-domesticated
from which we derive
insects both, are the chief insects
8
58 INSECT LIFE
benefits in kind. Then there are a few lesser-known
species. Curiously enough, from the highly injurious
family of CoccidcB these insects are mostly derived. The
Lac insect, an Asiatic species, provides us with shellac;
the Cochineal insect was once the medium of a thriving
industry in the Canary Islands, till the discovery of
aniline dyes sounded its death-knell; the Chinese pela
wax insect provides a high-grade wax —and these three
insects are all Coccidae ! Certain CynipidcB which make
used in the production of ink, and a limited number
galls,

of species of various orders which provide food for

people of depraved taste, complete the list of directly
beneficial insects.
 SPKINGTAILS 59

CHAPTER III

COLLEMBOLA, THYSANURA, MALLOPHAGA,

ANOPLURA, ODONATA, PLECOPTERA, EPHEME-
ROPTERA, ISOPTERA, AND ORTHOPTERA
Order Collembola, or Springtails.
Wingless, minute insects; antennae with few joints; six
segments to the abdomen; biting mouths; metamor-
phosis slight. The springtails form a much neglected
order, and there is a considerable divergence of opinion
as to their classification.
APHORURiDiE. —
Distinguished from all the other
by the absence of any ventral spring on the
Collembola
abdomen. They are soft-bodied, slow-moving insects.
—
PoDURH)^. Ventral spring on the fourth abdominal
segment.
Very common insects, but overlooked on account of
their small size; some of them measure only a thirtieth
of an inch in length. Achorutes duhius is a common
British species, found on damp soil or even upon the
surface of water. A. nivicola^ an American species,
occurs on snow.
EntomobryiDuE. —^Ventral spring on fifth abdominal
segment; abdomen cylindrical, much longer than broad.
Species of this family frequent greenhouses, bark of
trees, damp soil, etc. The American Lepidocyrtus
americanus is found in houses.
60 INSECT LIFE
—
Papiriid^. Ventral spring on fifth abdominal seg-
ment; abdomen very little longer than broad; last
segment of antennse short.
These insects frequent moss.
—
Smynthurid^. ^Ventral spring on fifth abdominal
segment; abdomen very little longer than broad; last
segment of antennae long.
Many species are brightly coloured; they frequent
fungi, decaying wood, and similar situations. Lubbock
described the behaviour of the common yellow Smyn-
" It is very amusing to see these
thurus luteus as follows :

little creatures coquetting together.The male, which

is much smaller than the female, runs round her,and
they butt one another, standing face to face, and moving
backwards and forwards like two playful lambs. Then
the female pretends to run away, and the male runs after
her, with a queer appearance of anger; gets in front and
stands facing her again; then she turns coyly round, but
he, quicker and more active, scuttles round her, and
seems to whip her with his antennae; then for a bit they
stand face to face, play with their antennae, and seem
to be all in all to one another.'*

Order Thysanura.
Wingless, minute insects with many -jointed antennae;
ten abdominal segments; slight metamorphosis; biting
mouth-parts.
Campodeid^. —Body hairy and terminated by two
long appendages.
Minute insects, frequenting damp earth.
—
Japygid^. Body hairy and terminated by a pair
of forceps.
 BIRD LICE 61

These insects resemble miniature Earwigs; they

frequent moss, but nothing is known concerning their
habits or Hfe-histories.
—
Lepismatid^. Body covered with scales and ter-
minated by three filamentous processes.
These are the well-known " Silver Fish." Lepisma
saccharina is a common sight wherever starchy or
sugary material is stored. It avoids the light and is

difficult to catch, for its scales are easily shed and it slips

from the grasp. Lepisma domestica, the "Fire Brat,"

haunts bakehouses and other warm situations.
—
Machiled^. Machilis maritima is frequently met
with on the sea-shore. Very little is known about the
mode of life of these insects.

SUBCLASS EXOPTERYGOTA.
Order Malloplaga.
Wingless, parasitic insects with biting mouths; bodies
hard and flattened; large flat heads; antennae three to
five jointed; eyes simple; legs strong, the fore-legs not
used for walking; metamorphosis incomplete.
These insects are known as Bird Lice in contradis
tinction to the Anoplura, or true Lice. The majority
are parasitic upon but several have mammals as
birds,
their hosts. Unlike the true Lice, they are not blood-
suckers, but find their sustenance on scurf, scales of
feathers, etc.
The order comprises four easily recognized families.
The species of two families have clubbed, four- jointed
antennae, and of these the species with one tarsal claw
belong to the Gyropidw and are parasitic on mammals;
those with two tarsal claws belong to the Liotheidce
62 INSECT LIFE
and are on birds. The members of the family
parasitic
Trichodectidce, parasitic on mammals, all have three
jointed, filiform antennae and a single tarsal claw; whilst
those of the remaining family, Philo'pteridcB also have ,

fihform antennae, but with five joints; and their tarsi

are armed with two claws; they are parasitic on birds.
From these remarks it is clear that the two-clawed
Mallofhaga are bird parasites, and the one-clawed
species have mammalian hosts.
The typical life-history of a Mallofhaga may be taken
as representative of the The female
whole order.
deposits her elongate, oval eggs singly upon a feather
or hair, according to her host. The immature Lice
break off a lid from the free end of the egg, and come
into the world not very dissimilar in appearance to their
parents. Naturally, they are smaller, their heads are
larger in proportion, and their body-markings are not
distinct. By a series of moults they attain the adult
stage. Bird Lice never wander from the body of the
living host; it is true they will pass from host to host
when they are in actual contact with one another, and
then only. It is remarkable, therefore, that the same
species of MallopJiaga may be found on totally dissimilar
hosts in both the Old World and the New.
Aquatic birds have their biting Lice, not specially
modified for life in the water, but protected, probably,
by the close-growing feathers of their hosts. One species
feeds upon the epidermal scales inside the pouch of the
pelican, but the student of biting Lice would be well
advised to begin with the domestic hen, which may
harbour five species of three genera, amongst them the
typical Menopon pallidum.
 TRUE LICE 63

Order Anoplura, or Lice.

Minute insects with large abdomens; antennae five-
jointed; wingless; mouth suctorial; tarsi with one claw.
The order is composed of the single family PedicuUdce^
or True Lice; there are four genera and a Hmited num-
ber of species. All the Pediculidm are parasitic upon
mammals, and three of them are the particular adjuncts
of man. Till comparatively recently but little has been

known of these insects, but with the attention that is

now being paid to medical entomology, and the un-
doubted connection between Lice and the spread of
disease, more and more of their history is unfolded.
Concerning the exact systematic position of these
insects there is still some doubt. Certain authorities
look upon them as degraded Hemiptera —degraded
through a long period of parasitic existence. Others,
again, consider them to form a distinct order, to which
the names Si'phunculata and Ano'plura have been
applied.
There are three species of human Lice, belonging to
two genera, or, according to Meinart and some others,
two species of difaent genera. The Head Louse,
Pediculus capitis, as name indicates, makes its home
its

on the heads of human beings. Its eggs, which are

on the
laid singly tips of the hair, are the all too famihar
**
nits." It is a curious fact that the Head Lice affecting
men of various races vary in colour according to the
hue of their host's skin. This has given rise to the yet
unproven theory that there may be a number of species
of P. capitis. The Body Louse, P. vestimenti, is very
similar to the Head Louse, so similar that doubts have
64 INSECT LIFE
In habits, at
arisen as to its being a distinct species.
any markedly from capitis ; it does not
rate, it differs
dwell in the human head, but in clothes, from which
it sallies forth to take its toll of human blood. It is
one of the most prolific of insects. The Crab Louse
Phthirius inguinalis, frequents the coarser hairs of the
human body, and in serious cases may even extend to
the beard and eyebrows; but it never infects the head,
for the good reason that its claws are unfitted for
grasping fine hair. It is a shorter, broader insect than
either of the species of Pediculus, and not unlike a
small crab.
It is a peculiarity of true Lice that they do not attack
mammals promiscuously; each Louse species is con-
fined to a special species of mammal or to closely allied
species. The Lice of domestic animals belong, for the
most part, to the genus Hcematopinus ; dogs, hogs,
horses, cattle, and sheep, all have their particular Lice.
Monkeys, though never attacked by Fleas in a state
of nature, are infested by a Louse of the genus Pedicinus^
which is peculiar in having only three joints to its
antennae. It is a curious, though unimportant, coin-
cidence that the Elephant Louse, Hcematomyzus ele-
phantis, is, like its owner, possessed of a long proboscis.
The Horse Louse, Hcematopinus asini, is not unlike the
Crab Louse, but larger and armed with much more
formidable claws. Even aquatic mammals are not free
from the attentions of these degraded insects. Seals
have a genus of their own Echinophthirius and none ,

of the individuals suffer the slightest inconvenience

from the lengthy submersion to which they are sub-
jected by their hosts.
 DEAGON-FLIES 65

Order Odonata, or DRAGON-rLiES.

AVings devoid of scales and never folded, elongate,
of nearly equal size, and much veined; eyes large;
antennae small and short; legs not adapted for walking;
jaws well developed; larvae and pupae aquatic.
The Dragon-flies are among the most beautiful of
our native insects; many are so swift of flight that it is

often difficult to observe all their beautiful metallic and

iridescent colouring, as they dart hither and thither in
search of their prey. Although perfectly harmless to
man and his belongings, some of the larger species are
of fearsome aspect, and this has given rise to many
ill-founded stories.In some parts of England these
insects are known as " horse-stingers ,"" despite the fact
that they could not sting had they the desire to do so.
They are also called " Devil's darning-needles," because
they are reported to sew up the ears of bad boys;
" snake-feeders "" they are called too they are supposed
:

to supply food to water-snakes. In Scotland they are

often referred to as " flying adders.'' In truth they are
very beautiful, harmless insects.
Afew details concerning the general structure and
habits of the Odonata may not be out of place, especially
as these insects difier from all others in certain essentials.
Although all Dragon-flies bear a certain family like-
ness to one another, there are, as in all orders, great
differences in size and build. They vary in size from
Mecistogaster lucretia, a South American species, which
measures six inches in length and five inches from tip
to tip of its down to minute S3nnpetrums; in
wings,
stoutness, even among our own species, from the portly
9
66 INSECT LIFE
Libellula depressa to slender Agrionids. In all species
their heads are remarkable for their large size and the
inordinate amount of rotation of which they are
capable.
Structurally, the most interesting feature of the adult
males is the separation of the ejaculatory ducts from
the intromittent organs. The former are situated on
the penultimate abdominal segment; the latter on the
ventral side of the second abdominal segment. When
copulation about to take place, the male curves his
is

abdomen so that its penultimate (ninth) segment is in

contact with the second, and pours the semen on to the
intromittent organ. During copulation the male grasps
the female round the neck with the claspers at the end
of his abdomen, and she curls the tip of her abdomen
round, in contact with the second abdominal segment
of the male. Frequently the male retains a hold of
his mate even during egg-laying, and should she be
one of the species given to laying her eggs under water,
he will follow her into that element rather than relax
his hold.
The means by which Dragon-flies capture their prey
is uncertain. That it is always captured on the wing
is well known, but the flight of these insects is so rapid,
they change their direction so suddenly, that the actual
captureis a matter of conjecture. The small insects, of
which Dragon-flies consume a quantity, are apparently
seized in the jaws; the larger ones are probably seized
by the legs and devoured during flight. At least, their
legs are well placed for such a happening; they are all

placed well towards the front of the thorax, and are

curved forward in flight.
 PLATE 11

^
A GROUP OF IJRAGOX FLIES
 DRAGON-FLIES 67

" Flies seem to be their commonest food, but large

dragon-flies will eat small ones. Leaf-hoppers and
even small butterflies and moths are captured by them.
Some forms will occasionally pick up a moth from a
weed or a grass stem on which it is resting, and even
one of the large swallow -tailed butterflies has been seen
captured by a dragon-fly, while Williamson states that
he once saw one holding a large wasp in its jaws. The
voracity of a large dragon-fly may easily be tested by
capturing one and holding it by its wings folded together
over its back, and then feeding it with live house-flies.
I should hesitate to say how many it will accept and

devour, as I never tried one to the limit of its capacity.

Beutenmiiller found that one of the large ones would
eat forty house-flies inside of two hours, while a smaller
one ate twenty -five in the same time. It ia an odd
fact that a dragon-fly will eat its own body when
proflered him. Even when insufficiently chloro-
to
formed and pinned, if one revives, it will cease all
efforts to escape if fed with house-flies, the satisfying
of its appetite making it apparently oblivious to the
discomfort or possible pain of a big pin through its
thorax."
The life-histories of the various species of Odonata
differ from one another in minor details, but in general
they are very similar. The female deposits her eggs in
water, either by dropping them on its surface, by
attaching them, enclosed in a mucilaginous envelope,
to some water-plant, or by inserting them in the stems
of aquatic vegetation. The species which have the
last-named habit are provided with pointed or roughened
sides to the vulva. The females, enclosed in a film of
68 INSECT LIFE
air, descend the stem of the plant they have selected
to a point well below the water-level, cut or file a slit

in their plant tissues, and deposit their eggs therein.

The larva appears in about a month, and at once
takes to a predatory life, walking slowly on the bed

Fig. 1. Head of Laeva of Blue Deagon-Fly (viewed feom

Below). (Much Magnified.)
I, With mask folded up ; //, with the same unfolded. A , eyes ; F, antennre
01, labram; Ok, mandibles; Uk, maxillae; Ul, labium, having the form
of a mask; 1 and 2, its two elongated portions; 3, the pincer-shaped
portion.

of the pond as it stalks its prey. Its colour renders it

inconspicuous on the mud, and its mouth-parts are
well adapted for its mode of life. The lower lip, which
is hinged below the mouth, is elongate, and when at
 DRAGON-FLIES 69

rest extends below the head; at its distal end there is

hinged another long segment with two sharply curved
teeth (forceps) at its free end. This second segment,
at rest, lies below the first; the whole covers the

—
lower face like a mask in fact, it is usually so called.
" When it is folded, the head of a dragon-fly larva,
seen from the front, looks like that of a bull-dog.
It is more innocent-looking than that of a bull-dog
simply because we know what a bull-dog can do; but
the moment that the larva approaches near enough to
its prey, the innocent-looking mask is unfolded and

darted out, and the probably unsuspecting aquatic

insect or small fish is seized by the teeth at the ex-
tremity and drawn back into the mouth."
The respiration of the larva varies according to the
species. In some there are external gills on the tail

and sides of the abdomen; in others there are so-called

**
rectal gills,'' and for their aeration water is sucked
into the rectum. Frequently the larva ejects this
water so violently that it propels itself for a considerable
distance.
Many moults are passed through by the Dragon-fly
larva, and after the third or fourth the wing rudi-
ments, in the form of two minute lobes, appear on
a pair of horny plates which were visible in the earlier
stages.The larva has now become a nymph. Many
more moults are accomplished before the nymph is
ready to change into the active, aerial Dragon-fly;
during this time the nymph breathes by means of
thoracic spiracles. When at length the change is about
to take place, the nymph, deserting its aquatic home,
climbs up the stem of a water-plant and clings firmly
70 INSECT LIFE
thereto. After a space, the nymphal skin splits down
the back, and the wings, head, and thorax are freed,
but the tip of the abdomen still remains within the skin.
The next part of the process is the backward bending
of the Dragon-fly, and in this apparently uncomfortable

Fio. 2.

A, The anterior portion of the body of a dragon-fly freed from the nymphal
Bkin; B, The tail being extricated.
From "Zoology of the Invertebrata," by A. E. Shipley.

position it will remain for several minutes, waiting for

its legsand wings to harden; then, bending forwards
once more, the old skin is seized by the insect's legs,
its abdomen arched, and its tip carefuUy withdrawn

from the nymphal skin. Now completely free, the

adult Dragon-fly crawls away from its abandoned
 DRAGON-FLIES 71

covering, but its wings and abdomen are still in an

imperfect stage. For some hours the newly awakened

Fig. 3.

C, The whole body extricated; D, the perfect insect Mschna cyanea, the
wiiigs having acquired their full dimensions, resting to dry itself,
preparatory to the wings being horizontally extended.
From " Zoology of the Invertebrata," by A. E. Shipley.

insect clings to its support, the while its wings expand,

its abdomen assumes its normal proportions, and the
full splendour of its brilliant colouring comes to it.
72 INSECT LIFE
In general, Dragon-flies are beneficial insects. Their
larvae may do some damage to fish-fry, but the adults
are highly destructive to insects, many of which would
prove injurious if allowed to increase to a great extent.
Unfortunately, the Dragon-fly is an insect likely to
become, more and more scarce as drainage becomes
more common. From the nature of its life-history
water is an essential to its existence. Sometimes, when
ponds dry up, these insects migrate in enormous num-
bers. Mandt, describing one of these migrations, says:
**
The air for miles around seemed literally alive with
these dragon-flies {Msclina heros) from a foot above
ground to as far as the eye could reach, all flying in
the same direction, a south-easterly course, and the
few that would occasionally cross the track of the-
majority could all the more easily be noticed from the
very regular and s-wift course they generally pursued;
but even these few stray ones would soon fall in with
the rest again. Very few were seen alighting, and all
carefuUy avoided any movable obstacles.'^
The order is divided into seven subfamilies, which
are easily distinguished by the characters given below.
Calopterygid^. —^Fore and hind wings similar, held
vertically in repose; eyes constricted at the base; at
least five cross-veins between the first and second
longitudinal veins, running from the node (the apparent
break on the front margin of the fore-wing) to the base.
The species of this family are noted for their beautiful
colouring. We have two in Britain, known as
" Demoiselles " or " Kingfishers." Calopteryx virgo has
beautiful metallic blue wings in the male and brownish,
often tinged with green, wings in the female. The
 DRAGON-FLIES 73

females of C. sflendens have greyish wings, but the

males have their transparent wings broadly banded at
their centres with deep blue. One of the most beauti-
ful species, however, is the common East Indian, C.
chinensis,whose males have transparent fore- wings and
brilliant green hind- wings. The American genus
Hetcerina may be recognized by the blood-red patch at
the base of the transparent, somewhat narrow wings of
the males.
Our British species may often be seen flying low over
streams the larvse of
; all members of the family breathe
by means of tracheal gills.
AGRiONiDiE. —Similar to CalopterygidcB, but with only
two cross-veins between the first and second longi-
tudinal veins running from the node to the base.
This is a large family of slender, graceful insects.
Most of them are small, though some of the South
American forms equal any of the Odonata in size. In
an order of active Flies they can only be described as
poor on the wing.
Our two commonest native genera are Agrion and
Lestes, and they are easily distinguished, though both
have transparent wings. At, or near, the tip of the
fore-wing of all Dragon-flies there is an opaque spot,
known as a stigma. The size, shape, and often the
colour of the stigma vary in different species. Species
of Agrion have small lozenge-shaped stigmas; in those
of Lestes they are large and oblong.
The bodies of all the species of this family are highly
ornate, metallic blues and greens being the predominat-
ing colours; the larvse breathe by means of tracheal
gills.

10
74 INSECT LIFE
GoMPHiD^. —^Front wings dissimilar from hind- wings,
held horizontally in repose; eyes not constricted, but
wide apart.
These insects are sometimes referred to as the true
Dragon-flies; by many authorities they are considered
to form a subfamily of the JEschnidce. Most of the
species are large, and many possess abdomens of peculiar
swollen form ; this is well seen in Gomfhus vastus. They
are not good performers on the wing, and the females
only take to flight at infrequent intervals. The eggs
are deposited on the surface of the water, and not upon
aquatic plants.
CoKDULEGASTERiDiE. —Similar to GomphidcB, but their
eyes touch at a single point at the top of the head.
These Dragon-flies are moderately large insects, and
they have been given their family name because of
their club-shaped abdomens, which are narrower in the
middle than at either extremity. They also are often
considered as a subfamily of the Mschnidce.
All of them are strong fliers; their wings are usually
clear or nearly so, and they lack the beautiful metallic
colouring which renders the species of other genera so
attractive. Their bodies are usually banded with
brown or yellow. Our common Cordulegaster annulatus
is a large, powerful insect, measuring upwards of four
inches in wing-span. It is black in colour, and has its

abdomen banded with yellow and its thorax striped

with the same colour.
jEscHNiDiE. —Similar to Gom^hidce, but their eyes
meet on the top of the head for some distance, and the
three ocelli are arranged in a straight line on the front of
the head. These are among the largest and most powerful
 DRAGON-FLIES 75

of all Dragon-flies ; all the species are exceedingly strong

on the wing, so much so that they may often be observed
flying far from the neighbourhood of water.
Mschna cyanea is one of the most beautiful of our
native insects. In general colour it is reddish-brown;
on either side of the thorax there is a large green spot,
and there are pairs of similar coloured spots along the
abdomen of the male; the female is distinguished by
yellow spots. The hind- wings are larger than the front
wings, and both are transparent. The equally common
A. grandis is as large as its relative, but reddish-brown
in colour with smoky yellow wings. The genus Anax
also contains some striking species.
—
CoRDULiD^. May be distinguished by the presence
of a single tubercle on the hind-border of each eye.
Very closely allied to the LibellulidcB, and frequently
considered as a subfamily. Many large species exist,
and the wings of most of them are banded with brown,
marked at the base with the same colour or clear.
—
LiBELLULiD^. Similar to Gom'phidcB, but the three
ocelli are arranged in a triangle.
Many of these Dragon-flies have broad bodies, which
give them a somewhat clumsy appearance; this is

specially the case with the common Lihellula depressa,

of which species the males are blue and the females
brown. L. quadrimaculata is equally common, but
more elegant; it is yellowish-brown and has a dark
spot at each node and on each wing- tip —hence its

name.
The genus Syni'petrum includes species of more slender
build, and the black S. scoticum is not uncommon.
Orthetrum is another genus with British species.
76 INSECT LIFE

Order Plecoptera, or Stone-flies.

Perlid^. —Four membranous wings; the hind- wings
much larger,though not longer, than the front wings
folded when at rest; antennae long and thread-like;
body long, soft, and often broad, bearing a pair of short,
moderately broad filaments at the apex.
The order consists of but a single family whose species
bear a superficial resemblance to the Caddis-flies. The
common British species is Perla bicaudata. It is a very
sluggish pale brown insect, and may often be seen
basking on stones near water in the summer. It rarely
takes to flight, and is a poor performer. Anatomically
these insects are interesting on account of the well-
marked between the three segments of the
divisions
thorax —in head and thorax of the common
fact, the
Stone-fly equal half the length of the whole insect.
The minute eggs are contained in a membranous
capsule, and are carried for a while by the female before
she deposits them in the water. Each female may
deposit upwards of thousand eggs, a necessary
six
proceeding, for the larvae are favoured food of fishes,
so that their mortality is great. The larvae are very
similar to the adults, except that they lack wings; they
possess anal filaments and long antennae. Although
capable of swimming, most of their time is spent
beneath stones in swift-running streams, a position
which their flattened bodies enable them to take up
with ease The mortality among the larvae is increased
by the fact that their larval life is protracted and, as so
often happens in such cases, the adults live but a few
hours.
 MAY-FLIES 77

The food of the " creepers/' as Perla larvse are called,

consists of minute aquatic animals, and hicaudata
breathes by means of paired tracheal In some
gills.

species there are neither gills nor spiracles, so that

respiration takes place through the skin. This mode
of breathing is uncommon among insects,and is only
found elsewhere in the larvse of Chironomidw and of
some parasitic Hymenoftera.
The nymphs leave the water before changing to adults
they climb on to some near-by stone, their skin splits,
and the Stone-fly emerges. Although the prevailing
colour of Stone-flies closely approximates that of the
stones on which they bask, there is an Australian genus,
Chloroferla, whose species are green.

Order Ephemeroptera, or May-flies.

Ephemerid^. —Hind- wings much smaller than front
wings, and not folded when at rest; abdomen bearing
two or three long, slender filaments; antennae short.
These insects are usually known as May-flies, some-
times as Day-flies, and by fishermen they are called
Green or Brown Drakes. Their larvse and nymphs are
aquatic There is but one family in the order, and our
common May-fly, Efhemera vulgata, is a typical species.
The females, after pairing, an act which takes place
in the air, deposit their disc-shaped eggs on the surface
of the water, and they sink to the bottom. The larvse,
as soon as they hatch, bury themselves in the mud and
start on their long larval life, which extends as long as
three years; during this time they undergo at least
twenty moults. Their food consists mostly of vegetable
matter, and respiration is carried out by tracheal gills
78 INSECT LIFE
assisted by three filamentous outgrowths from the tip
of the abdomen.
Then, when the larvae have changed into nymphs and
the latter are ready to take to the air, there happens
an event which is not paralleled among any other
insects. The nymphs rise to the surface of the water,
there is a brief pause, their nymphal skins split, and
they fly into the air, not as perfect insects, but as sub-
imagos. The young subimagos seek some near-by
resting-place, and another skin is shed and the grey
adult May-flies appear.
The adults of vulgata have three tail filaments and
very short antennae; their fore-legs, which are useless
for walking, are carried in front of the head, and at a
distance might be mistaken for antennae. They have
incompletely formed mouth-parts, and are incapable
of taking in food; could they do so, their intestines are
not capable of digesting any nutriment. The lives of
the adults are short, though not so short as is popularly
supposed and as their family name derived from the —
Ephemerides of Greek mythology, who lived but a day.
A case is on record of an adult Ephemerid which lived
for three weeks, but itmust have been a particularly
robust individual.
Kirby relates that the European OUgoneuria rhenana^
a white species, " appears in such vast numbers on the
Rhine after sunset as to resemble snowflakes."'

Order Isoptera, or Equal Wings.

TERMiTiDiE. —All four wiugs of equal size; males and
queens winged, workers wingless; biting mouths well
developed; body oblong and depressed; social insects.
 TERMITES 79

The order is composed of the single family TermitidcB,

and its members are known popularly as Termites; a
more common, but incorrect, name is White Ants
the Termites are neither Ants nor are they white.
They are more nearly related to the Perlidce and Ephe-
meridcB than to the Formicidce ; probably the fact that
they are social and dwell in colonies has given rise to
their popular name.
None of the species occur in Britain; a few are found
in Southern Europe, but the order attains its highest
development in the They are amongst the
tropics.
most injurious of all and there are few timbers
insects,
proof against their attacks. To be Termite-proof is
one of the greatest recommendations that can be
claimed for a wood destined for tropical use; there are
a few such timbers, but not many.
Speaking of these insects, Gates in his " Matabele-
land '*
says: "
The White Ants kept tumbhng over me
all night,and knocking down leaves from the roof.
These White Ants are the curse of all African travellers
and settlers, devouring everything except iron and tin,
whilst in time even houses succumb to their ravages.
They form, however, an article of food in many places
amongst the natives, by whom they are much esteemed
on account of their slightly acid flavour. The enormous
structures they erect are frequently carried up the
trunk of a high tree, or may sometimes be seen standing
alone at a height of eighteen feet.
" The Dutch Boers and others make use of these
Ant-hills for cooking purposes, hollowing out the loose
portion of the heap, and filling the hollow thus formed
with wood, which is lighted, and, when consumed.
80 INSECT LIFE
renders the receptacle an admirable oven, retaining its

heat for a great length of time."

In tropical Australia, Asia, and America, there are
enormous colonies of Termites, and often their nests
are structures as large as houses.
There is a great deal to be learned of the habits of
these tropical Termites so far as they have been studied
;

the economy of one colony appears to be very similar

to that in any other. Termes flavifes is one of the
commonest European species; T. lucifugus is by no
means rare in the Mediterreanean region; T. tuhi-
formanff, a Texan species, has the curious habit of con-
structing tubular shelters of cow-dung round the stems
of plants. Another Texan species makes nests of the
same material on tree-trunks. Of this species Buckley
wrote " They marched in dense columns along path-
:

ways leading to a hole near the base of a stump, into

which they entered. They dwell in the ground,
. . .

where they have rooms, seldom more than one to two

inches long, connected by tunnels. After rains . . .

which are of rare occurrence in that climate they —

make semi-cylindrical tubes, which lie on the ground,
with a length of from three to six inches. These arched
ways sometimes intercept each other, being connected
with chambers; but they rarely work by day above the
surface,and never in bright sunshine."
The formation of a new Termite colony commences
with the nuptial flight, in which winged males and
females issue from the old nests in enormous numbers
and come to the surface to pair. After pairing, the
wings of both sexes break off, and the females either
start new colonies of their own or, falling in with wing-
STICK INSfXl
Pnge
 TERMITES 81

less workers from another colony, start their new home

with their assistance.
Enormous numbers of Termites perish during these
flights; as with the Seventeen- Year Locust (p. 119), the
advent of innumerable individuals is the signal for all

manner of enemies to gather to the feast so freely

provided. That some fertilized females escape every
danger is shown by the survival of the race.
Having reached a place of safety, after pairing, the
female, who is now a queen and is probably assisted
by workers, seeks a hiding-place where her new colony
may be formed.For the rest of her life she becomes
littlemore than an egg-laying machine by the workers ;

she is enclosed in a special royal cell in whose walls

there are numerous holes, through which the workers
may pass when carrying the eggs provided by the
queen to other parts of the nest. In some of the
tropical species the appearance of a fertile queen is
extraordinary Her abdomen, distended with eggs,
swells to the size of a small potato, thirty thousand
times as large as that of a worker Termite. Her head
and thorax form a mere spot at the end of this in-
ordinately large organ. Her egg-producing capacity is
prodigious, and is estimated at sixty a minute, or
eighty thousand a day.
The larvse are not nearly so helpless as those of the
social Hymeno'ptera, and they are very soon able to
fend for themselves. Their food varies, and may either
consist of wood-fibre, their own cast skins, their own
excrement, or regurgitated food. " When a Callotermes
wishes for food," according to Grassi, " it strokes the
posterior part of the body of another individual with
11
82 INSECT LIFE
its antennae, and by some sort of a reflex action the
contents of the alimentary canal of the individual stroked
issue from the anus, and are devoured by the stroker."
In each colony there are always a queen, workers
of at least two castes, and winged males. The workers
are wingless females; they look after the queenand her
eggs, and carry out other domestic duties in the nest;
some of them become supplementary queens, capable
of carrying on the duty of stocking the colony should
any accident befall the true queen. The second caste
consists of soldiers; they are individuals with enor-
mously developed jaws; they are often five times the size
of the ordinary workers, and, being unable to partake
of ordinary food on account of theirhuge jaws, have
cannibalistic tendencies, frequently making a meal off
their fellows. In certain species there is yet a third
caste,whose heads are modified into snout-like processes.
These individuals are known as nasuti, or " nosed " ones,
and their sole duties consist of mending the walls of the
nest when they are broken, a feat which is accomplished
by the aid which exudes from the hollow snout.
of a fluid
A about every Termite nest is its
striking feature
extreme cleanliness; the insects even eat their own
excrement again and again till all the nourishment is
removed. Another feature, which the reader will
probably have surmised already, is the presence of
guests —^they frequent the nests of all social insects.

Order Orthoptera, or Straight Wings.

Insects with biting mouths; front wings (tegmina)
much narrower than the hind-wings and of a leathery
texture; hind-legs of many species designed for leaping;
 COCKEOACHES 83
metamorphosis incomplete; eggs often enclosed in a
case.
This large order contains some of the most interesting
insects; in habits they differ considerably from one
another: some, the Mantids, are predaceous; others,
the Locusts, are herbivorous; yet others, the Cock-
roaches, are practically omnivorous. In all the families
—there are six in the order —metamorphosis is incom-
plete; the larvse, except that they are wingless, are in
all essentials miniatures of the adults. Although the
Orthoptera receive their name from the straight margins
of the tegmina which cover the membranous hind-
wings, there are some species with functionless wings
and some that are wingless.
We have remarked that many of the Orthoptera are
of great interest; to this order belong the curious Stick
and Leaf insects, the wary Mantids, and a large number
of musical insects. There is, in fact, no order con-
taining a larger number of species exhibiting either
protective or aggressive mimicry or singing powers.
Despite their innate interest, many species are exceed-
ingly harmful. Crickets are not the insects that the
ordinary man would welcome in his house, Cockroaches
are noxious creatures, and Locusts have been notorious
since bibhcal times.
The six families of Orthoftera are easily distin-
guished; the earlier systematists separated the families
with leaping powers {Saltatoria) from those whose
members run over the ground (Cursoria). The same
characters are still used in the classification of these
insects.
Blattid^.—Hind-femora similar to the others; head
84 INSECT LIFE
nearly horizontal ; body flattened and oval (occasionally
round); ovipositor concealed.
The Cockroaches, commonly but erroneously called

Black Beetles, are all too familiar. The common

Cockroach, by the way, is neither black nor is it a
Beetle; how it came by its name is a mystery. Maybe
the geniuswho founded the family is in part responsible,
for theterm Blatta means a Beetle.
In Britain we have at least two Cockroaches, the
common species, Blatta orientalis, and the American
Cockroach, Periplaneta americana. Neither of them
is a native species, but of the various Blattidce that are

introduced from time to time, they alone seem to have

become established. P. americana is a chestnut-brown
insect, considerably larger than its more common
relative.
The common Cockroach is a dark brown insect,
beautifully adapted for its peculiar mode of life. Both
sexes are clad in a leathery armour, so smooth that they
can only be held captive with difficulty. Their bodies
are considerably flattened; in consequence they have
no difficulty in crawling through narrow chinks in
floors, etc. Their antennse are long and thread-like,
their long legs well armed with spines. The wingless
females are longer and, in consequence, apparently
narrower than the winged males.
A more detailed study of this insect will well repay
the time spent upon it. The position of the head,

typical of the Blattidce ; the long antennae, continuously

vibrating, unless their owner is cleaning them by
running them through his jaws; the bristles on the
legs, used as body-combs (the Cockroach is clean in
 PLATE V

HEAD OF MANTIS

LONG CO UN DEETLE
I
 COCKKOACHES 85

person, though his habits be repulsive); the padded

feet, enabHng owner to walk up moderately smooth
their
—
surfaces these and a hundred other details may be
learned from little more than a superficial examination
of this famihar insect.
All Cockroaches appear to like warmth, and most of
them shun the light; our common species is no excep-
tion. Breeding with orientalis takes place in the
summer months. Each female lays sixteen eggs, and,
as usually happens amongst the OrtJioptera, they are
enclosed in an egg-case. The Blattid egg-case is very
similar to a purse with a snap opening; it is a small
oblong sac, closed at the bottom and sides and capable
of opening at the top, though held together by the
tension of the edges. The egg-case is formed within
the body of the mother Cockroach, where also the
sixteen eggs are arranged in two rows, with the ends
from which the emerge pointing towards the
larvae will
top of the case. The female runs about, often for some
considerable time, with the egg-case partly projecting
from her abdomen, and not till she finds a suitable
shelter will she deposit it. The larvae, when they
emerge, push their way through the opening of the
case; they closely resemble the adults, but, of course,
they are very small and have no wings; also they are
pale in colour. They pass through a number of moults,
and with each one they become more and more like
their parents, darker and darker in colour, and at the
final moult they attain their full sexual characters.
Cockroaches have many enemies, predaceous and
parasitic; of the latter, the curious Evaniidce are the
best known.
86 INSECT LIFE
f Although the prevailiDg colour scheme of the order
is some shade of brown, grey, or black, there is an
American genus, Panchlora, with pale green species.
Certain exotic species are brightly coloured; the Indian
Corydia 'petiveriana. is black spotted with yellow, and
it is exceptional also in being round instead of oblong

in outline. The giants of the family belong to the

American genus Blaherus, and B. giganteus far exceeds
all other Cockroaches in bulk.

—
Mantid^. Hind-femora not swollen; front legs
designed for grasping; head oblique, generally tri-

angular; prothorax long and slender.

The Mantis an insect around whose supposedly
is

pious habits a considerable amount of romance has been

woven. Mantis religiosa, a common, green South
European species, is so devout in its attitude that it
has been named religiosa by scientists and " praying
Mantis " by laymen. In truth, all the species of
MantidcB are predaceous, and not only so, they are
cannibalistic; the females never hesitate to seize and
devour their mates if the latter are too pressing in their
attentions. They are all exceedingly voracious, and
Slingerland relates how *' One Sunday a Green Mantis
ate three Grasshoppers, each seven-eighths of an inch
long, a daddy-long-legs, and then tackled another
Mantis, and I was obliged to interfere with them."
The Praying Mantis has earned its name from its
habit of remaining motionless for long periods with its

front legs raised in the air, as though in the act of

supplication. Its attitude, however, is not one of
devotion, but of anticipation; in this position the
Mantis awaits its prey, and should an unwary insect
 MANTIDS 87

come witliin reacli of the cruel, spiny, grasping fore-

legs, they are shot forward with lightning rapidity, the
insect is seized, conveyed to the mouth, and eaten.
All the Mantids capture their prey by stealth; they
creep towards their victims at times so slowly and
cautiously that their movements are imperceptible, but
ever the grasping fore-legs await the moment to seize
their prey.
Certain beautiful tropical species very closely resemble
brilliant orchid flowers in colour and in form. These
species bask on the orchid-plants, hopeful that insects
bent on floral visitations will mistake them for blossoms.
Though the majority of Mantids are sombre in their
colouring —green is a favourite hue —
some species are
quite ornate. The genus Harpax contains some striking
forms, H. ocellaria, a West African species, having dark
green tegmina, with a bright yellow eye-spot in the
centre of each one.
As with all the Orthoftera, the metamorphosis of
Mantids is incomplete. There is nothing very striking
in their life-histories except the pecuHar form of the
egg-masses. These vary in form and minor details
according to the species, but in every species the eggs
are laid in parallel rows in hard and horny cases. The
egg-masses, usually oval in shape, are attached to a
tree-branch or other support, and the eggs are arranged
on end down the centre. At first it was puzzling to
know how the females could deposit their eggs so neatly
within so hard a substance as that composing the body
of the egg-mass. Further investigation showed that
the horny substance is deposited by the female at the

same time as her eggs, and that, when first formed, it

88 INSECT LIFE
is semi-liquid and|frot]iy, only becoming hard in con-
tact with the air. Despite the apparently impenetrable
covering of the Mantis eggs, they are not without their
Hymenopterous parasites.
Phasmid^. —Femora of hind-legs not thickened, front
legs similar to the other legs; head nearly horizontal,
generally quadrangular.
These are the great mimics of the insect world; the
Stick and Leaf insects belong to this family. In point
of size they are exceedingly variable; some of them are
quite minute, while some of the tropical species measure
as much as a foot in length.
All the Stick insects are sluggish in their habits ; all are
vegetable feeders, and many are highly destructive to
crops; Lopafhus cocofhages^ a brown insect, is a notori-
ous pest of coconut-palms, and when alarmed it has the
objectionable habit of squirting an irritant fluid for
some distance. In this connection, Kirby states that
*'
one of the South African species is able to eject an
offensive fluid a distance of five feet."
The Stick insects are remarkable anatomically for the
great variation in the development of their tegmina and
wings. Some have short tegmina and well-
species
developed wings; again, there are species whose wings
and tegmina are both short; and there are other species,
and they are many, which are completely wingless.
The life-history of a Phasmid is particularly interest-
ing and very easy of observation. Hibernation takes
place in the egg, and the young Stick insects hatch in
the spring. They immediately make their way from
the ground where they hatch to the twigs of some
near-by tree or shrub, and then they remain motionless
PLATE VI
 STICK INSECTS 89
for days or weeks on end, their fore-legs stretched
out
in front of their heads to increase
their resemblance to
a twig, their green colour harmonizing
with their sur-
roundings. They moult but twice, and growt.h is
rapid. At the last moult all the females and some of
the males abandon their green colouring
and become
brown—at least, this is the case with many non-tropical
species. The change is not without interest, for the
plants upon which the Stick insects
live are by this
time losing their leaves, and will soon
be little more
than masses of bare, brown twigs, on which
green Stick
insectswould be conspicuous. That all the males
do
not change their colour simply means
that they are
" following the rule, which holds
more or less through-
out nature, that the male sex is not so
well protected
as the female, since upon the latter
depends the all-
important function of reproduction.''
The eggs of Phasmidce are not enclosed in
cases, nor
are they attached to leaves, twigs,
or other supports.
Contrary to the usual Orthopteron rule,
the eggs are
laid singly and merely dropped
on the ground. The
eggs of all species bear a striking resemblance to
seeds;
some are of extraordinary form, and all have
little lids
which the larvae raise when they are about
to emerge
Once, in New York, the Thick-Thighed
Stick insect,
Diapheromera femorata, increased to such an
alarming
extent " that in autumn the dropping of
the eggs on
the leaf-covered earth sounded like a
heavy shower of
rain.''

Among the winged Phasmids, the Brazilian Cypho-

crania semirubra is the most striking; it has
yellowish-
green tegmina and large pink wings. Curiously like a
12
90 INSECT LIFE
bamboo-stem is the green, wingless Phihalocera pytho-
nius, and rivalling the Stick insects in bizarre form are
the Asiatic Leaf insects of the genus Phyllium.
In habit and life-history the Leaf insects are very-
similar to the Stick insects. They are strikingly leaf-
like, with their flattened, expanded, green tegmina, and
the resemblance is heightened in some species by the
possession of leaf-like appendages on the legs. Some
species have the outline of their leaf-like expansions
so that they appear to have been eaten by larvae round
their edges; others are so marked that holes appear to
have been bitten out of the inner portions.
—
Gryllid^. Hind-femora stouter than the others;
tarsi three-jointed; antennae long and slender; wings
laid flat over the back.
This is the family of the Crickets, of which we have
five species in Britain; three of them, the House Cricket,
Gryllus domesticus, the Field Cricket, G. campestris^
and the Mole Cricket, Gryllotalfa vulgaris, are quite
common. The family is by no means large, and a
study of the species wiU show that they fall naturally
into three groups of types . There is the true Cricket type
as exemplified by G. domesticus ; the burrowing type,
with feeble or no wings, and front legs modified for
turning up the earth of these Gryllotalfa vidgaris is an
:

example; the nocturnal Tree Crickets, which spend all

their lives in trees: of these we have no native species.
Among the exotic Gryllidce there are some formidable
and repulsive-looking species The Indian Schizodactylus
.

monstrosus, a brown species, about an inch and a half

long, is a hideous insect. Its wings and tegmina, which
are longer than its body, are coiled in spirals at their
 PLATE VII

LEAF INSECT
 CEICKETS 91

tips; its tarsi bear curious leaf-like expansions which

make the creature appear almost web-footed. The
Australian Anostostoma australasice is but little more
inviting-looking; the largest species of all, however,
belong to the genus Deinacrida, and dwell in trees in
New Zealand. " They are sometimes four or five inches
in length, and their legs are very large and set with
rows of very formidable spines, resembling those of a
brier. The natives are afraid to climb the trees on
account of these insects, which are able to inflict a very
severe bite." From the same country comes Macro-
pathus filipes, one of the most remarkable species of
the family. The body of the insect is of reasonable
proportions, not exceeding about an inch in length,
but its antennae often exceed the body-length by six
or seven inches.
Among the wingless Crickets there are some curious
forms, mainly belonging to the genera Callimenus and
Brachyporus. They are quite unlike all other Crickets
in appearance, and might be mistaken for enormous
Wood Lice. Of the Tree Crickets, many species are
exceedingly destructive to vines, raspberries, and other
plants, for they all have the noxious habit of laying
their eggs in the stems of these plants.
LocusTiDiE. —Somewhat similar to GrylUdce, but
tarsi four- jointed and almost identical in structure on
all legs; ovipositor resembles a much compressed,
sword-shaped blade; wings and tegmina roof-like.
The name of this family is likely to lead to confusion,
for the members of the family are not true Locusts, as
might be expected, but Long-Horned Grasshoppers.
The true Locusts belong to the Acridiidce^ and, apart
92 INSECT LIFE
from any other feature, may be distinguished from the
members of this family by their short antennae. To
avoid confusion this family is often known as the
PhasgonuridcB ; but, for reasons which do not call for
explanation here, Locustidce is the better term.
Nearly all the Locustidce have leaf -green tegmina,
frequently veined with yellow or white, so that they
have a very leaf-like appearance. There is a South
American species, Pterochroza ocellata, which rivals the
Leaf insect in its mimicry of foliaceous structures; its
tegmina not only closely resemble leaves, but are so
marked that they appear like leaves damaged by
insects and upon which fungoid growths have settled.
Another species, Myrmeco'phana fallax, mimics Ants in
its colouring.
The largest British Locustid —our largest Orthopteron,
in fact —is the Great Green
Grasshopper, Locusta
viridissima. It measures fully four inches in wing-
span, but, despite its large size, it is rarely seen —not
because it is uncommon, but because it is nocturnal in
its habits.
In America certain species of Long-Horned Grass-
hopper are known as " Katydids," from the supposed
resemblance of the male song to that word. To call
the note of these insects a song is somewhat of an
exaggeration, despite the fact that many species,
notably Chloroscelus tanana, from South America, are
kept in cages on account of their musical powers. Not
long ago certain Japanese Locustidce were on sale in
London, and probably elsewhere; in their little wicker
cages they were a novelty and caught the public fancy.
Their " singing^" powers were feeble and monotonous,
 GRASSHOPPERS 93
although the stock of one enterprising dealer bore the
legend, " Sing like Canaries ''—but there are canaries
ttTid canaries.
The note of Locustidce and Gryllidce is made by
rubbing patches on the under-surface of the
file-like

tegmina against a ridge on the upper surface of the

wing. The males alone ''sing/' and their song is
always a love song. In both families auditory organs,
in the form of oval membranous depressions, are found
on the front tibiae.
Many Locustids have tegmina curiously and regularly
marked with black dots. The green Australian, E'phip-
pitytta triginguitata, for instance, has a double row of
these dots upon its tegmina.
Several curious forms occur in this family; some
species of Stenofelmatus are of evil mien, and the
genus Cyrtofhyllum has one or two species, notably
C. crepitans, which are not remarkable for their beauty.
The life-history of Microcentrum retinervis, so called
from its reticulate tegmina, has been described by
Howard. In America the insect is known as the
Angular-Winged Katydid. Winter is passed in the
egg stage, and the most curious fact about this insect
is its curious method of oviposition. The flattened,
oval, slaty-brown eggs are often
in thedeposited
strangest situations: on the edge of a fence, for instance,
and some ''
have been found on the edge of a freshly
laundried collar which had been laid for some time in
a bureau drawer. Riley records oviposition on the edge
of a piano cover and on a long piece of cord." They
are usually deposited, however, in double rows on
twigs, and each egg slightly overlaps its neighbour, like
94 INSECT LIFE
slateson a roof. In the warmer States they are laid
on the edges of leaves, " in which case one row will
be found on one side of the leaf and the other row on
the other side." Whatever the situation selected, the
surface of the material on which the eggs are to be
placed is first roughened in the jaws before the batch

of from two to thirty eggs is laid. From one hundred

to one hundred and fifty eggs are deposited by each
female. The young Katydids, very pale in colour,
emerge in the spring from the upper edges of the eggs.
—
Acrid iiD^. Antennae much shorter than the body;
hind-legs with enlarged femora formed for leaping;
ovipositor, a double pair of short plates divergent at
the tip.
The family of the Locusts contains some of the
largest as well as the most destructive insects. The
South American Acridotheres dux is probably the largest
insect known. Many individuals measure fully a foot
in wing-span, with a body-length of four inches, but
they are not nearly so destructive as their smaller,
more active relatives.
In Britain we have several representatives of the
family. The common Rhammatocerus biguttatus is a
brownish or frequently greenish insect, with yellowish-
green legs. An interesting account of its habits ap-
peared several years ago in the transactions of the
Devonshire Association. The eye-witness of the pro-
ceedings said: " I have frequently observed our most
abundant Grasshopper, 22. biguttatus, sounding his music
in the presence ofand hopping round a female. Some
years ago I was greatly amused as well as instructed
by observing several insects of the same species, both
 PLATE VIII

NEW ZEALAND CRICKE1

 LOCUSTS 95

males and females. I was drawn to the spot by the

extraordinary noise made by these creatures. It was a
very hot day, and on a bare portion of a hedge-banl?
between Exeter and Budleigh Salterton. I cautiously
crept up to the place from whence the sound proceeded,
and there, to my delight, I first saw how these insects
produced the sound which I had heard. In the centre
of this group were several females, apparently listening
to the concert; the males were, some hopping, some
walking, and others gesticulating in the most ridiculous
fashion around these ladies, and each playing to the

Fig. 4. Hind-Leo of Field Locust. (After Landois.)

r. Row of chitinous teeth on the inner side of the femur. Opposite: some
of the teeth strongly magnified.

best of his abilities on his peculiar musical instrument,

no doubt to their great amusement and dcHght."
The sound-producing apparatus of the true Locusts
and Grasshoppers is totally distinct from that of the
Locustidce and Gryllidce. On the inner side of the hind-
femora in the males there is a file-like ridge; this is
rubbed against a ridge on the outer edge of the tegmina.
The auditory organs are, as in the species of the other
families, membranous depressions, but they are situated
on the first abdominal segment. So far as we know,
only the smaller species of the family are capable of
producing sound; there are, however, auditory organs
96 INSECT LIFE
on many species whose note has never been detected
by the human ear.
Some of the Acridiidce are of extreme beauty, and
some of curious form. The large South American
Titenacris albipes is one of the most beautiful members
of the family. Itstegmina are duU green; the front
margins of its wings are of the same shade, graduating
into pale blue and then into a brilliant purple, the last-
named being the prevailing wing colour. Here we
may remark that, apart from their colouring, the wings
of these insects are of great beauty. They are large
and fan-shaped, veined with a number of veins radiating
from the base, and with many smaller cross-veins.
When not expanded, they are folded fanwise beneath
the tegmina.
Of the curious forms, the species of the genus Truxalis
are remarkable by reason of their elongate bodies and
snout-like heads. The species of Cefhalocoema are very
similar in form, but their heads are more sharply pointed
than those of Truxalis. In Tettix we find curious
attenuated forms, whose general dorsal outline may be
said to resemble two triangles placed base to base, the
equilateral triangle forming the anterior part of the
insect and the isosceles triangle forming its posterior
part.
Concerning the harmful species volumes have been
written. They are migratory in habit, and their
migrations are undertaken in search of food. Adults
and immature forms of these migratory Locusts will
travel in countless thousands from district to district.
While on the wing they darken the sky on the ground ;

nothing but the seething masses of their bodies can be

 LOCUSTS 97

seen; when they have passed, vegetation is destroyed

over the whole area, not a green blade remains; no
human army retreating before its foes could lay bare
**
the land more completely. Voet-gangers," or '*
foot-
goers,'' as the immature Locusts are South
called in
Africa, are equally destructive. True, they have no
wings, therefore they cannot fly, but they often migrate
on foot, despite their disability. South Africa, North
Africa, and the Mediterranean region, are the districts
most affected by Locust migrations. Formerly the
vegetation of the Mississippi Valley was destroyed by
migrations of the Eocky Mountain Locust, Melanoflus
spretus, whose breeding-grounds were situated on the
elevated plains of the Rocky Mountains. All the
migratory species are provided with large wings, by
means of which they can make a peculiar crackling
sound at will. The non- migratory species can always
—
be distinguished by their attenuated wings ^the North
American Dictyophorus reticulaius, an ungainly, small-
winged creature, is an example; on the other hand, by
no means all of the larger-winged species are in the
habit of making migrations.
The life-histories of all the AcridiidcB are very similar.
The females lay their eggs in masses, below the surface
of the ground, and each egg-mass is covered with a
sticky semi-fluid excretion, which soon hardens and
forms a capsule protecting the eggs. The larvae emerge
in the spring, and, by a series of moults, pass through
the nymph to the adult stage.

13
 INSECT LIFE

CHAPTEK IV

EUPLEXOPTEEA, EMBIOPTEKA, PSOCOPTERA,

THYSANOPTERA, RHYNCHOTA
Order Euplexoptera, or Earwigs.
The order includes a single family
—
FoRFicuLiD^. Tegmina short; wings, when present,
large and ingeniously folded when at rest; abdomen
terminated by a pair of forceps.
Everyone knows the Earwig, but, despite the fact that
it is so common, there are some startling discrepancies
and differences of opinion concerning its habits. This
is by no means an uncommon happening; very little

was known of the ubiquitous House-fly till rather less

than ten years ago, when attention was drawn to its
insanitary habits.
The common British Earwig, Forficida auricularia, is

widely distributed over the world. How

came by its
it

popular name no one seems to know. It is commonly sup-

posed that Earwigs are in the habit of entering the ears of
human beings, with dire results. That such a happen-
ing has never taken place it would be foolish to deny;
to state that it is the usual practice of Earwigs would
be equally absurd. These insects are in the habit of
entering any dark cavity they can find, for they are
nocturnal in their habits. In their search for shelter
 EARWIGS 99

they might enter the human ear, but their doing so

would be purely accidental. Other authorities state
that the wing of this creature, wl:en unfolded, is much
hke an ear, and that is the reason for its name. The
fact remains that all over Europe and in America the
insect has popular names relating to an ear.
On the subject of its food, opinions are also divided;
one party holds that the Earwig is a destructive insect,
doing much harm to vegetation; by the other party it
is said to be a carnivorous insect, feeding upon harmful
creatures. This much is known of its life-history : Its
eggs are laid in batches, and the mother insect takes
the greatest care of them, moving them from one place
to another wherever she deems best for them, and
brooding over them between whiles. The appearance
of the larvae, which are similar to their parents, though
smaller and paler coloured, is the signal for the female
Earwig to leave her progeny to their own devices.
Another British species. Labia minor, is also quite
common, and, unlike auricularia, it flies by day.
Many of the exotic Forficulidce are large insects
large, that is, compared with our native species; the
peculiar forceps with which their bodies terminate is

the most striking and constant character of these insects.

The forceps of the different species differ considerably
in form: some are stout and nearly straight, others
very slender and much curved, and there is every
intermediate stage. Their precise use is open to some
doubt; they are often opened in a threatening manner
in the presence of danger, but in most species the
forceps are useless for defence. Some species un-
doubtedly use these organs to assist in folding their
100 INSECT LIFE
wings. The latter are large, and when not in use are
packed into a small space by fanwise folds followed by
a couple of transverse folds. Several species of Earwig,
however, are wingless; why, then, do these insects,
having no wings, possess a pair of forceps ? The
question is one which must be left unanswered for the
moment. The wingless forms follow the rule usual in
the family, that the forceps of the females are smaller
and more simple than those of the males.

Order Embioptera.
EMBiiDiE. —Head large; antennae slender; its joints
varying in number from eleven to thirty; tarsi three-
jointed; all four wings of equal size; metamorphosis
incomplete.
These insects are closely allied to the Termitidce^ and
have the appearance of being small individuals of that
family. Little is known of them, though they appear
to be fairly widely distributed. The brick-red Egyptian
species, Embia savignyi, is one of the best known of the
Embiids.
Order Psocoptera.
PsociDiE. —Head very large; long, slender, thread-
like antennae; tarsi with two to three joints; hind- wings
smaller than fore- wings; metamorphosis incomplete.
Some species of this order frequent old books and
papers, probably feeding upon the starchy materials in
the bindings —these insects are popularly known as
Book Lice; other species dwell out of doors, on old
lichen-covered trees or on leaves, living together in
colonies.
 BOOK LICE 101

The Psocids are tlie non-house-frequenting members

of the order. Some of them are so minute that
they would be difficult to observe were they not in the
habit of collecting together in clusters. The two-
spotted Psocus, P. bifunctatus , is a common British
species, dull yellow in colour and about a quarter
of
of an inch in wing-span; it frequents the stems of old
apple-trees.
Howard gives an interesting account of P. venosus,
a common American species: " is small and smoky-
It
brown and is seen upon the trunks of trees
in colour,
in flocks numbering from a dozen to forty or fifty
individuals. They feed in companies and browse upon
the lichens, which they cleanly remove from the bark,
leaving a clear space behind them. The colonies consist
of one or more families, and include individuals of all
ages, the wingless young herding with the adult insects.
The adults, though winged, do not readily take to flight.
When alarmed, the whole troop huddles together,
apparently for mutual protection, like sheep, but when
seized with a sudden panic they scatter in every direc-
tion and run rapidly over the bark, their colour har-
monizing so closely with that of the bark that they are
not easily distinguished. Soon after they reassemble
and begin to eat the lichens.
*'
The eggs are oval, glistening white, and are laid upon
the bark in batches of fifteen to thirty, deposited on end
in several rows and each cluster is protected by an
oval, convex shield of gna wed-up wood which adheres
closely to the eggs. The females brood over the eggs,
see that they are not disturbed, and, when they hatch,
lead the young ones forth to pasture.''
102 INSECT LIFE
Psocus citricola, living on orange-leaves, has very
similar habits.
—
Atropid^. Similar to Psocidce, but mngless.
All the Book Lice are small, almost colourless insects.
Our common Atwpos 'pulsatoria is only a twentieth of
an inch in length, and must be known to most of our
readers, though it may not have been recognized, as it
runs rapidly over the leaves of old books or about old
furniture.
There is little reliable information concerning these
insects, but they are certainly injurious in libraries,
museums, etc.

Order Thysanoptera, Fringe- Winged Insects.

Very minute insects with mouth-parts intermediate
between a biting and a sucking mouth; four wings,
when present, fringed with hairs, but may be much
reduced or absent; two- jointed tarsi terminated by a
bladder-like vesicle.
These minute insects, which are generally termed
Thrips, average about one-thirtieth of an inch in length.
The largest species is the PiM^tis^Mo^nldoloiJirifssfectrum^
and it only attains a length of one-third of an inch.
Thiips have received scant attention from ento-
mologists; rather more than one hundred and fifty
species are known, but it is surmised that there are
probably a vast number of species as yet undescribed.
Although neglected as an order, these minute insects
are by no means devoid of interest. Their mouth-parts
are peculiar in that they cannot be described as true
sucking mouths, nor yet as true biting mouths. They
are still more unusual on account of the fact that they
 THRIPS 103

are not tlie same on either side. This bilateral asym-

metry is very unusual in insects.
The wings of these tiny creatures are very character-
istic; the fore and hind wings are always placed wide

apart, and both pairs are always fringed with hairs. They
are very fragile, and often the fore and hind wings are
of different colours and texture. The very curious
feet resemble little bladders, membranous and pro-
trusible structures which probably give their owners
a better hold on smooth leaf-surfaces than would claws
Metamorphosis is striking, and is intermediate between
complete and incomplete. The larvse resemble the
adults fairly closely and precisely as regards their
mouth-parts. The nymphs are not active, as is usual
with nymphs, but are enclosed in a skin and take no food.
The majority of these insects appear to feed upon the
pollen of flowers; some of them, however, are notorious
pests. The Pea Thrips, Kahothrifs robustus, lays its
eggs in pea and bean flowers, upon the stamens or
young pods. Both larvae and adults are injurious, and
in bad seasons no pods are formed. The Orange
Thrips, Eutlirifs citri, causes a considerable amount of
trouble in California by causing white marks on the
fruit, which, while not actually injurious to the oranges,
lowers their market value. In the same State the
Pear Tlnips, Euthrifs pyri, is a very serious pest. It
is particularly partial to pears, prunes, and cherries,
and injures them by passing to the tenderest parts of
the buds and killing them.
Some species of Thrips, like certain species of Aphis,
spend part of their time on one food-plant and part
on another. Such an insect is the Flax Thrips, Thrips
104 INSECT LIFE
lini, whicli, after taking up its abode on the roots of
flax for a period, migrates later to other food-plants.
In many respects these insects have much in common
with Aphids; for instance, there are winged and wing-
less females, and also parthenogenesis is of common
occurrence.

Order Khynchota, or Bugs.

The RhyncJwta are all provided with hard, horny,
jointed sucking beaks, usually with two pairs of wings,
and theirmetamorphosis is incomplete. The young
resemble the adults, more or less, at birth, and with
each successive moult the similarity becomes greater.
The order is divided into two suborders — (1) Heteroftera^
possessing fore-wings thickened at the base and mem-
branous at the tips, also with beaks inserted at the front
part of the head; (2) Homoptera, possessing uniformly
thickened fore-wings and beaks inserted at the hinder
part of the head.
The number of species in the order is very great,
more than twenty thousand being known to science.
In point of age they were amongst the earliest insects
to appear on this earth, their fossil remains being found
in Palaeozoic rocks. Popularly known as " Bugs,"
though in America many insects of other orders are
so named, the Rhynchota are of the greatest economic
importance. A large number of them, such as the
Aphids or Green-flies, the Coccids or Scale insects, the
Aleurodids or White-flies, and the Psyllids or Jumping
Plant Lice, are exceedingly destructive to vegetation.
There is, in fact, no single family of insects containing
a greater number of injurious species than the Coccidce.
 BUGS 105
Some " Bugs " are carnivorous and prey upon other
insects; of these ilesh-eaters, the Reduviids are the
best known. In the main, however, the order is com-
prised of enemies of thehuman race, so much so that
one eminent entomologist has stated that " if anything
were to exterminate the enemies of Hemi'ptera, we our-
selves should probably be starved in the course of a
few months/'
There is one pecuHarity of the Heteropera, or true
" Bugs," which soon makes itself apparent to the
student
of these insects. Many of them are possessed of a
peculiar and characteristic odour. The Bed Bug has
a decidedly disagreeable perfume. " Others smell like
very ripe or overripe fruit, especially pears, while in
some Coccidce the odour is aromatic and in others it
is spicy like cinnamon." In every case the odour
arises from a volatile oil which is exuded from orifices
known as "stink-glands;" its object is probably pro-
tective, for few enemies would relish an evil-smeUing
Bug.
Suborder Heteroptera.
The members of this suborder dwell either upon land,
upon water, or under water. The suborder contains
—
two series (a) Gymnocerata, with conspicuous antennae;
and (b) Cryptocerata, with hidden, inconspicuous an-
tennae. Curiously enough, the purely aquatic forms all
belong to the latter series, and the dwellers on land
and water to the former.

Series Gymnocerata.

Pentatomid^ may be recognized by the fact that

the bases of their five- jointed antennae are not visible
14
106 INSECT LIFE
from above, the scutellum is large —at least half as
long as the abdomen, often larger —the beak is four-
jointed, and two ocelli are always present.
The family is the largest of the Heteroptera, and the
species are as varied in form and size as in colouring.

Many are as brilliantly attired as the most gaudy

tropical Beetles; some are sombre in the extreme; others,
again, are so delicately tinted that their appearance
soon changes after death. For the most part, they are
plant-feeders, but some appear to eat vegetable and
animal fare impartially.
Although the family is a large one, very little is

known concerning the habits and life-histories of the

species of which it is comprised. There are nearly forty
species of PentatcnnidcB in Britain, and one, Acanthosoma
griseum, is interesting in that it is one of the few insects
known to mother its young.
In the United States, the Harlequin Cabbage Bug,
Murgantia histrionica, Hahn, is a serious pest of cruci-
ferous crops. The insect goes by the curious popular
name of the " Abe Lincoln Bug " in Georgia, and the
" Third Party Bug " in Texas.
The green Pentatomids of the genus Nezara, common
in many parts of the world, are known to feed upon
either plants or insects as opportunity offers.
—
CoREH)^. Scutellum less than half the length of the
abdomen; beak and antennae four-jointed, the latter
inserted on the sides of the head; the membranous
portion of the wing-cases with a number of forked,
longitudinal veins.
This is another large family of which only about two
dozen species occur in Britain. In the main, the
 BUGS 107

Coreidce are of sombre hue, though many species atone

for their lack of brilHant colouring by their eccentricity
of form. In some species the antennae bear flattened
dilatations, and in many the femora or tibiae of the
hind-legs are either much swollen, armed with formid-
able spines, or are ornamented with flattened, disc-like
and of unknown use. The
structures, brightly coloured
South American Diactor hilineatus has leaf-like hind
tibiae. In Leftoglossus phyllopus we see the same
abnormality, less highly developed. Metapodius femor-
atus has thickened spiny femora, but of all the Coreidce
none more curious than the South European Phyllo-
is

morfha laciniata. The back of this creature forms a

hollow, by reason of the upturned edges of its body
In the hollow of its back the male carries his mate's
eggs, held in place by numerous spines. None of the
British species exhibit any pecuHarities of structure.
The Coreidce are all plant-feeders, and many of them
are exceedingly destructive to crops. The American
**
Squash Bug,'' Anasa tristis, De Geer, is a noted pest
of Cucurhitacece.
Lyg^id^. —The characters of this family are very
similar to those of the Coreidce. The Lygseids, however,
may be distinguished by the fact that the antennae
are inserted " well down on the sides of the head,"
whilst the veins, on the membranous portion of the
wing-cases, are unbranched and four or five in number.
This is another large family with more than fifty British

species, though most of our native forms are small and

drab. The Lygaeids are not so ornate as the Penta-
tomids, or of such peculiar structure as many of the
Coreids. The prevailing colour of the family is black
108 INSECT LIFE
relieved with yellow or red. Like the Coreids, all the
species are plant-feeders; some of them are among the
most notorious of crop pests. The Chinch Bug, Blissus
leucoftenis , Say., of Northern America and the West
Indies, is exceedingly injurious to cereals, especially
to maize. The insects collect in thousands on the stems
of their food-plants, and, by sucking their juices, cause
them to wilt. Having destroyed one crop, they migrate
to another, not by flying, though they possess the power
of flight, but by walking. In certain favourable seasons
the Chinch Bugs are kept in check by a fungoid disease
which kills them off in large numbers.
Pyrrhocorid^ are very similar to LygcBidce, but
whereas the latter have ocelli and unbranched wing-
members of
veins, the this family lack ocelli, and the
membranous portions of their wings show more than
six forked, longitudinal veins.
The family is much smaller than any of the three
we have already mentioned, and there is but one British
species, Pyrrhocorus apterus, and it is by no means
common. For the most i^snt, PyrrJiocoridce are tropical
or subtropical. These insects are plant-feeders, and
many of them are of economic importance, especially
the Cotton-Stainers, Dysdercus spp., and the Lessei
Cotton-Stainers, Oxycarenus spp. Of the former we
may take Dysdercus suturellus, H. Schf., as our type.
The insect is common in the Southern States of America
and in the West Indies. It is doubly injurious, for not
only does it feed upon the juices of oranges, causing
the fruit to decay where its beak pierces the rind, but
it feeds upon cotton bolls. The Cotton-Stainer has
earned its title from its habit of dyeing the cotton in
 BUGS 109

tte bolls witli its yellow excretions. " Experiments

have been made with this insect looking toward its use
as a dye, and the whole substance of the insect can be
converted into a rich orange-yellow dye, which can
readily be fixed on woollens or silk by the alum mordant
liquor/'
The Lesser Cotton-Stainers, Oxycaremis spp., are
natives of Africa and India. They, apparently, only
attack cotton bolls which have already been damaged
by other insects. When they do enter the bolls, how-
ever, they destroy large numbers of unripe seeds. Un-
like the true Cotton-Stainers, these insects do not damage
the cotton with their excrement, but become crushed
during ginning, thereby staining the fibres. This
contretemps may
be avoided by spreading the cotton
in the sun before ginning, when the insects will take
to flight.
TiNGiD^. —Like the Pyrrhocoridce , have no
they
ocelli, their fore- wings are longer than the abdomen,
the penultimate antennal joint is much elongated and
the last joint is knobbed. The tarsi are two- jointed.
The Tingids are known in America as " Lace Bugs,"
and for once the title is apt. For the most part delicately
formed insects, many of them are so beautifully sculp-
tured and so bizarre in appearance that they form
interesting objects when magnified. They are well
represented in Britain, for of a small family no less
than a score are native to this country. Our commonest
species is Tingis pyri, destructive to pear-trees. All
are plant-feeders; some dwell in malformations of
flowers; others assemble in such numbers on the leaves
of certain trees and suck the plant juices so vigorously
110 INSECT LIFE
as to cause a general wilting to take place. Their eggs
are usually laid on the leaves of their food-plants ; little

barrel-shaped structures they are, and so firmly affixed

to the leaf that it is impossible to remove them without
lamage to their support.
Aradid^. —Flat, broad insects, without ocelli; their
and narrower than the abdomen.
/dng-cases are shorter
Often deeply sculptured, and always of a brown or
reddish-brown colour.
These Bark Bugs cannot readily be mistaken for any
other insects; they are so abnormally flat that one
noted entomologist has said that they look as though
they had been stepped upon. There is good reason for
and their drab colour, for they live beneath
their flatness
bark and feed upon the fungi which they find there.
Being flat, they can easily crawl into the narrowest
chinks, and their brown colour renders them less easily

observed. Only five species occur in Britain.

Hydrometrid^. —Antennae four-jointed; tarsi two-
jointed; wings often absent or possessing no mem-
branous part; legs often greatly elongated; body often
pubescent.
The HydrometridcB are of interest on account of their
habit of living on the surface of water. In form they
are exceedingly diverse. A common British member
of the family, Hydrometra stagnorum, popularly known
as the Water-Measurer or, erroneously, as the Water
—
Gnat it is not related to the gnats is a creature —
worthy of study. Its body is narrow and stick-like,
its head much elongated, and its wings are never

developed. Though by the aid of its long, slender

legs it is enabled to walk on the surface of the water,
 BUGS 111

holding itsbody aloft, should misfortune occur and the

creature become wet, it will drown more readily than
many purely terrestrial insects.
Another British insect, Velia currens, the Water
Cricket — it is not alhed to the Crickets — is also perfectly
at home on the surface of the water, and the two longi-
tudinal orange stripes which ornament its back render
it somewhat conspicuous.
Members of the genus Gerris, common on our ponds,
differ in habit from the two preceding forms, in that
they do not spend all their time on the surface of the
water, but often dive. The pubescence with which their
bodies are clothed prevents them from getting wet.
Halohates spp. are ocean-dwellers, many of them
having been found on the surface of the ocean, far
from land. The family contains many aberrant forms,
and all of them, so far as is known, feed upon animal
matter, though probably few hunt and capture living
prey.
Henicocephalid^ are distinguished by a globular
swelling of the head behind the eyes, very short beak,
and much- veined, wholly membranous fore-wings.
There is no British representative of this order; in
fact, only about a dozen, though widely distributed
species are known. " A Tasmanian species dances in
the air after the fashion of Midges or May-flies, and
dispenses an agreeable musk-like odour."
Reduviid^ very closely resemble HenicocephalidcB,
but there no globular swelling behind the eyes; beak
is

short and forming a loop below the head when at rest;

tarsi three-jointed.
The Reduviids are as variable in form as the Hydro'
112 INSECT LIFE
metridcB, and far more variable in colour. All of them
are predaceous, even to the extent of attacking man;
on this account they have been named " Assassin,"
" Pirate/' and " Cannibal " Bugs. The family is a
large, important,and mdely distributed one.
The " Blood-Sucking Cone Nose," Conorhinus san-
guisuga, sometimes called the Giant Bed Bug though —
the Bed Bug is not a Keduviid —normally lives in the
nests of field mice. In the South- Western States of
America it enters human dwellings and sucks the blood
of the inmates, causing painful, festering sores.
Another species, Reduvius 'personatus, which occurs
in Britain, may be called a friend of mankind, for it
preys upon Bed Bugs and Cockroaches. The miniature
forms of this insect, and of closely allied species, have the
curious habit of covering their backs with any portable
matter that may be at hand. The house-dwellers use
dust, and some of the outdoor species make use of
lichen.
All the members of the subfamily EmesidcB are deli-
cate, elongated, long-legged insects, resembling minia-
ture Stick insects. Their movements are slow, and
they have the common habit of raising and lowering
their bodies as they progress. " Their front legs are
peculiarly formed for capturing and holding their prey,
and have long coxae, like Mantis, so that these insects
are commonly mistaken for small or young Mantises,
from which their sucking proboscis at once distinguishes
them."
Eeduviids exhibit remarkable mimicry of
Certain
other insects." According to Seitz, there is found on
the Corcovado in Brazil a Keduviid that exactly re-
PLATE IX
 BUGS 113

sembles one of the dark stinging-wasps of the genua

Pefsis, and the bug makes the same movements as
the wasp does, though these are of a kind quite different
to those of ordinary bugs/' One of our native species,
Nabis immature stages, closely mimics
lativentris, in its
an Ant. Like many other Ant-mimiking Bugs, Nahis
lives amongst the insects it so closely resembles, thereby
in all probability preying upon them the more easily.
It is aremarkable fact that the adult Nahis in no wise
resembles an Ant.
CiMiciD^ have no ocelli on their short, broad heads;
wing-cases rudimentary; three-jointed tarsi; and a beak
which fits into a groove under the head.
The family comprises a dozen species, of which the
cosmopolitan Bed Bug, Cimex lectularius, L., is the
best known. The Bed Bug is a flat-bodied, wingless
creature, parasitic upon man. In Elizabethan times
itwas common in every house in the country; now the
abolishment of the four-poster bed, a favourite haunt of
the insect, and greater attention to cleanliness have
combined to oust this pest from our dwellings. Like
all parasite insects. Bed Bugs can exist for extra-

ordinarily lengthy periods without their normal food-

blood. When they pierce the human skin they do not
secrete any poison, but their bite is painful. They are
suspected of carrying recurrent fever and leprosy.
Man is not the only enemy of this loathsome insect;
Reduvius 'personatus is its inveterate foe; several species
of Ants and, in addition. Cockroaches prey upon it.
Capsid^ have relatively large wings and wing-cases,
the latter with only two cells (sometimes only one) in
the membranous portion. The four- jointed antennae have
15
 114 INSECT LIFE
very long second joints, and the two basal joints are plainly
stouter than the two end joints. Tarsi three-jointed.
This family is probably the largest ofall the Rhyn-

chota, and there are nearly two hundred species in

Britain. Most of them are plant-feeders, though some
few attack and feed upon other insects, notably Campo-
hrochis grandis, which preys upon the Elm-Leaf Beetle,
Galerucella luteola, an American forestry pest.
Poecilocafsus lineatus, F., the Four-Lined Leaf Bug,
is a common American pest of garden plants, such as

currants and gooseberries. It is interesting on account

of its method of oviposition, a method which is common
to many Capsids. Longitudinal slits are made by the
female in the stem of some food-plant. Each slit,
which may be an eighth of an inch in length, is so deep
that it passes half way to the pith. From two to
fourteen eggs are deposited, side by side, in every slit.
Capsids of the genus Helopeltis are very destructive
to tea-plants in India.

Series Cryptocerata.

—
Nepid^. The end of the abdomen is provided with
two grooved filaments, forming a respiratory tube; the
long, raptorial front legs are affixed to the forward end
of the prothorax.
There are only two, widely distributed, genera in the
family,and both are represented in Britain. The genus
Nepa comprises flat, oval forms, whilst all the members

of the genus Ranatra are elongate. The filamentous

appendages of the abdomen, so characteristic of the
family, are important and interesting. Each filament
is grooved in such a manner that when brought into
PLATE X
 WATER BUGS 115

contact with its neighbour the two form a hollow tube,

along which air passes to the respiratory apparatus
within the insect's abdomen.
Nefa cinerea, L., the Water Scorpion, is a common
inmate of our stagnant ponds. It is not easy to detect;
in appearance it resembles a small dead leaf as it floats
on the surface of the water. On the muddy bed of its
home where it seeks its prey it is still more difficult to
observe. A sluggish creature, it rarely flies, though
provided with wings. Prey, in the form of small water-
frequenting creatures, is seized and held by the fore-

legs, which are admirably adapted for the purpose.

Along the inner side of each of the femora on the fore-
legs there runs a deep groove; into this the tibiae fit
much manner of the blade of a pocket-knife
after the
in its handle. The inner edges of the tibiae are sharp,
and there is little chance of any creature escaping when
once firmly in the grasp of the " Water Scorpion."
The eggs of Nepa are peculiar. They are inserted into
the stems of water-plants, much in the same manner
as are those of the Capsids. The body of the egg
remains buried in the plant tissues, but from its apex
there project seven thread-like protuberances, which are
possibly connected with the aeration of the egg.
Ranatra linearis is not nearly so common in Britain
as its Nepa. It is popularly known as the
relative
Water Stick insect, and is a much more active creature
than the Water Scorpion, being frequently observed
on the wing. In other respects the habits of the two
insects are very similar, but the eggs of Ranatra only
possess two thread-like protuberances, instead of the
seven invariably found in Nepa.
116 INSECT LIFE
Belostomid^. —Hind-legs adapted for swimming; no
ocelli or respiratory filaments.

This is a small family of aquatic Bugs, and no species

occur in this country. Some of the South American
species are among the largest of insects, measuring
nearly five inches in length. They are predatory, and
the larger species prey upon fishes, which they catch
in their powerful, grasping fore-legs. They are strong
fliers, and readily take to wing. All of them are mud-
coloured, unattractive-looking creatures.
The genus Zaitha comprises some active, free-swim-
ming species. It is the habit of these creatures to carry
their eggs from place to place, firmly cemented to their
backs with some insoluble substance. For a long time
it was thought that the females were thus solicitous of

their progeny, but later researches have shown that it

is the male who obligingly performs the duties of nurse.
At times burden becomes irksome to him, and then
his
he does not hesitate to attempt to relieve himself of
his load; his efforts, however, are usually unavaihng.
These eggs, by the way, are looked upon as a delicacy
by gourmets in some parts of South America.
—
NoTONECTm^. ^Fore-tarsi with two claws; head
inserted into prothorax.
These predaceous aquatic Bugs are commonly known
as " Water Boatmen."' They all swim upon their backs,
propelling themselves by means of their long hind-legs,
which they use as oars. Notonecta glauca, a dem'zen of
nearly every stagnant pond, is an active swimmer,
strong on the wing, and exceedingly rapacious. When
these Water Boatmen dive beneath the surface of the
water, they carry with them a film of air which renders
 PLATE XI

A GROUP OF HO.MOFTERA
Nos. 1, 2, i and 5 are Cicadas, tlie last being- the only British species; the other figures
represent [•"nlgorida', No. 3 being the so-called Candle fly Nos. 7, 8 and i) are Flatidse.
;
 WATER BUGS 117

them buoyant, so much so that they are compelled to

anchor themselves to some water-plant, lest they should
rise, willy-nilly, to the surface.
Plea minutissima , another British member of the
family, is a minute, inactive creature which dwells in
the muddy beds of some ponds.
—
CoRixiD^. Closely allied to Notonectidw, but the
fore-tarsi have no claws, being adapted for swimming,
and the head overlaps the prothorax.
These insects resemble the Water Boatmen in habits,
with the important difference that they swim in the
normal manner and not upside down; moreover, they are
not so buoyant in the water as the Boatmen. The
commonest of the many British species is Corixa geoffroyi
a brown, yellow-spotted creature, which retires to the
mud, in which it buries itself, on cold days. Sigara
minutissima is the sole representative of another British
genus.
" The eggs of two Mexican species (Corixa mercenaria
and C. femorata) are laid in enormous numbers in lakes
near the city of Mexico, and are made into cakes with
meal and are eaten by the Indians and half-breeds.
They are said to have an agreeable acid flavour. I '

ate some once, but it was a stale museum specimen

and had anything but a pleasant taste. These Mexican
species are imported into England by the ton as food
for game and song birds, poultry, and fish. Kirkaldy
has computed that one ton contains 25,000,000 of these
insects."
. ^ -, , Suborder Homoptera.
3 u^n CiCADiD^. —Between the compound eyes there are
•• '
three ocelli arranged in a triangle; antennae, except for
 118 INSECT LIFE
the basal joint, are minute and bristle-like: front femora
thickened and toothed.
Most of the Cicadas are large, showy insects, with
membranous, prominently veined wings. Some of them
are brilliantly coloured, vieing with the tropical Butter-
flies. Nearly all are inhabitants of the warmer parts of
the earth; there is one British species.

The two outstanding features of this family are the

well-developed vocal powers of the males of practically
every species, and the extraordinarily protracted life-

cycle of one species.

There are no insects capable of making more noise
—
song some would call it ^than the Cicadas. ** A curious
difference of opinion prevails as to whether their song
is agreeable or not; in some countries they are kept
in cages, while in others they are considered a nuisance.
The Greeks are said to have decided in favour of their
performances, the Latins against them.'' An American
entomologist, describing the " song " of a native Cicada,
*'
says: The general noise, on approaching the infested
woods, is a combination of that of a distant threshing-
machine and a distant frog-pond. That which they
make when disturbed mimics a nest of young snakes
or young birds under similar circumstances a sort of —
scream. They can also produce a chirp somewhat like
that of a cricket, and a very loud, shrill screech, pro-
longed for fifteen or twenty seconds, and gradually
increasing in force then decreasing.''
The song is produced by the rapid vibration of
certain complex vocal organs, which are situated on
either side of the base of the male abdomen. The
females either have no vocal organs or structures of so
 PLATE XII

HEAD OF CICADA, UNDP:R-SIDE, HIGHLY MAGNIFIKD

 CICADAS 119

rudimentary a nature that they are incapable of emitting

a sound. This latter fact led the Greek poet Xenarchus
— —
evidently a married man to write, " Happy the
Cicadas' lives, for they have voiceless wives/' It is
all

probable that the vocal efforts of the males are intended

to attract the females.
One of the most romantic of life -histories in all the
insect world belongs to the Periodical Cicada, Vicada
septendecim, L., sometimes wrongly named the Seven-
teen Year Old Locust.
The females are armed with powerful ovipositors,
and by their aid the eggs, in enormous quantities, are
deposited in the twigs and young stems of trees, caus-
ing, needless to say, considerable damage. When the
larvae emerge from the eggs, they at once fall to the
ground and burrow beneath its surface, constructing
for themselves little subterranean
chambers. For seven-
teen long years the larvae live below ground without
seeing the light of day. They move but little and
slowly,and the nature of their food is uncertain. Four
moults are passed through before the nymph stage is
reached, then a general migration to the surface of the
soiltakes place. Sometimes the nymph at once ascends
the neighbouring trees; sometimes they build little
earthen chimneys on the surface of the soil, in which
they await a favourable opportunity to show them-
selves. In any event, they reach the near-by trees
sooner or later, the nymphal skin splits, the adults
emerge in their hundreds of thousands, and the air
resounds with the cries of the males. The arrival of
the adult Cicadas is the signal for the advent of hosts
of enemies; even the English sparrow, a typical grain-
 120 INSECT LIFE
eater, cannot resist a meal of a plump Cicada. Their
periodical visitations, their innumerable enemies, and
the fact that the whole aspect of the earth's surface
may have changed, during the seventeen years of larval
life, allcombine to render the extinction of this interest-
ing insect merely a question of time. The females
which survive their short stay upon earth lose no time
in mating and depositing their eggs; in a few weeks
the larvae have travelled to their subterranean dwellings,
and the district knows the periodical Cicada no more
till the passage of seventeen years. There is a race,
however, which only spends thirteen years below
ground.
The American Bureau of Entomology has mapped
out the sites of all the broods in the continent. " The
largest of the North-Eastern broods made its last
appearance in 1902, and is due again in 1919."
^ ^^ FuLGORm^. —^Very variable. The antennae and ocelli
(usually two) placed beneath the eyes; the former
usually two-jointed, terminated by a filament.
A large family of very varied forms, both in size and
general structure. Some of these insects of the sub-
family FlatidcB are remarkably like Lepidoptera at a
casual glance; others have the front of the head pro-
duced into an enormous snout or a large bulbous growth,
which early travellers wrongly asserted to be luminous.
Members of the tropical American gemis Phenax, and
notably P. auricoma, are remarkable on account of the
relatively enormous masses of waxy threads which they
secrete. In auricoma these threads are sometimes six
inches long and harbour Lepidopterous larvae which
devour the wax, being transported from place to place
 PLATE XIII

1^

-V^'
 FEOG-HOPPEES 121

tlie while by the accommodating Bug. Of what use this

wax may be to the Fulgorids is unknown, but in China
the secretion from a native Bug is made into candles.
About seventy species of Fulgoridce are known in
Britain; all, British and exotic, are plant-feeders.
^ Membracid^. —Prothorax prolonged backwards into
a horn or shield over the abdomen; two ocelli between
the eyes, and the antennae inserted in front of these
organs.
Of all insects, the Membracids are the most bizarre
in form. " Nature must have been in a joking mood
when tree-hoppers {MemhracidcB) were developed.*'
They are mainly tropical, only two species being known
in Britain, and they are all relatively small in size and
of sombre coloration.
It is probable that the quaint forms of the majority
of Membracids serve for their protection; many of
them very closely resemble the structures of various
parts of the plants, such as seeds, thorns, etc., on
which they All of them deposit their eggs in
live.
slits madesome favoured plant by the ovipositor of
in
the female. This habit causes them to be looked upon
as pests by gardeners and farmers.
—
Cercopid^. Two ocelli, placed on the vertex;
antennae inserted in front of and between the eyes;
prothorax not prolonged above the abdomen; hind-
tibise with one or two stout teeth below.
This is the family of " Frog-Hoppers ''
or " Cuckoo-
''
Spit insects. They are so called because, in the first
place, they all have the power of leaping to consider-
able distances, and, in the second place, the larvae have
a habit of surrounding themselves with a frothy secretion.
16
122 INSECT LIFE
Our native Cuckoo-Spit insect, Philcenus sfumarius, is
well known to everybody. The female deposits her
eggs on plant-stems in autumn, and the young hatch
in the spring. They at once proceed to dig their beaks
deep into the tissues of the food-plant, and from the
end of the abdomen a clear liquid exudes. By dint of
violent agitation of the abdomen this liquid is beaten
into a froth, which completely hides the larva.
Although hidden, the position of the young insect is
thus rendered more conspicuous, and certain Hymen-
opera do not hesitate to drag him from his hiding-place
to serve as food. " The phenomena known as weeping-
trees are often due to Cercopidce ; some of the species
make such copious exudations of this kind that the
drops have been compared to a shower of rain. In
Madagascar it is said that Ptyelus gondoti exudes so
much fluid that five or six dozen larvae would about
fill a quart vessel in^an hour and a half. ... In
Ceylon the larva of Machcerota guttigera constructs
tubes fixed to the twigs of the tulip-tree, and from the
tubes water is exuded drop by drop."
^' Jassed^.
—Closely allied to' Cercopidce, from which
they may be distinguished by the fact that their hind
tibise are armed with numerous spines.
A large family of minute, fragile insects; all are
vegetable-feeders, and it has been computed that fre-
quently on an acre of pasturage there are about a million
Jassids which consume as much, if not more, grass than
a cow.
^ Proconia undata, an American species, owing to its

habit of ejecting a spray of liquid when disturbed, is

also responsible for " weeping-tree '*

stories One of
 PLATE XIV

A MKMBRACID WHICH MIMICS A THO:<N

 GREEN FLIES 123

these mysteries, which occurred in Texas some time

ago, " set the State agog with various explanations of
the phenomenon, ranging from the superstitious credence
of the supernaturally inclined to the positive denial
and derisive laughter of the constitutionally sceptical.
It took a brave newspaper reporter to solve the
mystery, since he alone dared to climb the tree and
investigate."
Many though so small and frail, are
of the Jassids,
beautifully and brilliantly coloured.
—
PsYLLiD^. Ocelli three; antennae with eight to ten
joints; tarsi two- jointed and femora frequently swollen;
wings transparent.
These minute insects much resemble minute Cicadas.
They all possess the habit of jumping, and they all

secrete a sweet, sugary liquid, known as honey-dew,

which is much sought after by Ants, Bees, and Wasps.
Some of them form galls, in which part of the life-cycle
is passed.
About fifty species occur in Britain, of which the
Pear- Tree Psylla, Psylla pyricola, is a well-known pest.
The larval and pupal stages of these insects are strikingly
unlike the adults.
Aphed^. —Winged or wingless; antennse three to
seven-jointed. A pair of tubes often project from the
upper surface of the fifth abdominal segment. Tarsi
two-jointed, legs long and slender.
The Aphids, or so-called Green-flies, are notorious
plant pests, yet, withal, exceedingly interesting to the
biologist by reason of their peculiarities of reproduction.
So rapidly do they increase that Huxley computed that
" the uninterrupted breeding of ten generations of Plant
124 INSECT LIFE
Lice from a single ancestor would produce a mass of
organic matter equivalent to the bulk of five hundred
millions of human beings, about the population of the
Chinese Empire/'
The most notorious members of the family are the
'Phylloxera, Phylloxera vastatrix, which, rather more than
fifty years ago, destroyed more than a third of the French
vineyards, and the Woolly Apple Aphis, Schizoneura
lanigera, a well-known pest wherever apples are grown.
For a complete account of the reproduction of Green-
fly readers must refer to the larger textbooks; space

forbids more than a brief survey in these pages. From

the winter egg, which is deposited on a food-plant, an
individual arises which quickly, and without pairing,
produces living young. Its progeny do likewise, with
the result that, the egg stage being omitted, the numbers
of Green-flies increase very rapidly. Most of these
youngsters are wingless; some are winged, and migrate
to other food-plants; all are females. Towards autumn,
more and more winged forms appear, some of them
being males, some females. Pairing then takes place
for the first time, and the eggs, destined to survive the
winter, are deposited in suitable sites.
In some Aphids, notably in the genus Chermes, the
more complicated. In Chermes ahietis
life-history is far
there are six generations, some being spent on spruce
and some on larch.
All the Aphids are constantly beset by enemies they :

would increase out of all bounds were this not the case.
Ladybirds, Syrphid-flies, Lace wings, various Hymen-
oftera, and blue-tits, all serve to keep them in check.
The relations of Ants to Aphids is treated elsewhere.
 WHITE FLIES 125
Aleurodid^.— Opaque white wings; antennae seven-
jointed.
These minute four-winged insects cannot easily be
confused with other Bugs, though in their early stages
they bear some resemblance to Ccccidce. They are
known as White-flies, on account of the mealy covering
of their wings. Some of them are somewhat serious
pests in orange-groves, not on account of the damage
they do themselves, but because of a fungus which
grows profusely on the honey-dew they secrete. The
most harmful of these White-flies is Aleurodes citri. In
Britain there are three species, of which the commonest
is J. brassicce, and is frequently met with on cabbages.
The metamorphosis of the White-flies is complex, and
has given rise to considerable confusion.
CocciD^.—Feet with but one claw; males winged and
lacking mouth-parts; females wingless, and usually
scale-like or gall-like.
This large and widely distributed family contains
some of the greatest pests of the husbandman. Popu-
larlyknown as Scale insects or Mealy Bugs, many of
them are of great biological interest.
The typical female Scale insect remains stationary
during almost the whole of her life, with her beak
pierced deeply into the tissues of the plant on which
she dwells. Her body becomes covered with a waxy
scale, and beneath this scale she either lays her eggs
or produces living young. The larvse at once wander
to other parts of the tree,and become anchored to a
new position, by means of their beaks. The females
go through from three to five moults before becoming
adult and truly scale-like. Eventually they become
126 INSECT LIFE
eyeless and legless. The males, however, after the
second moult, assume relatively large wings and long
antennae. Their eyes are large and their legs are long,
and, curiously enough, where one would expect to find
the mouth, there are ocelli.

The female becomes an egg-producing machine and

little more; the one function of the male is to discover
and fertilize some female.
Among the important species of this family may be
mentioned the San Jose Scale, Asfidiotus ferniciosus,
introduced into America from China, and a serious fruit
pest; the Cottony Cushion Scale, leery a purehasi,mtio-
duced into California from Australia, and responsible
for an enormous amount of damage in the orange-groves
till the Ladybird, Novius eardinalis, its inveterate enemy,
was brought from the Antipodes to keep it in check;
the Black Scale Saissetia olece, another orange pest
controlled, partially at any rate, by the Hymenopteron,
Seutellista cyanea ; the Mealy Bugs, unprotected by
any scale and common in our greenhouses, the best-
known being Pseudoeoecus eitri.
Some of the Coccids are useful. From Carteria laeea
is derived lac, from which shellac is obtained. Coceus
mannifera secretes an edible honey-dew, the manna of
biblical times. Cewplastes ceriferus and Erieerus pela
both produce wax of commercial value in India and
China respectively. Dyes are also obtained from various
Coccids —Cochineal, Coecus eacti, being known to every-
body.
PLATE XV

Page 128
 ALDER-FLIES 127

CHAPTER V
PLANIPENNIA, TRICHOPTERA, AND
LEPIDOPTERA
SUBCLASS ENDOPTERYGOTA.
Order Planipennia.
Heads of moderate size; antennae filiform or clubbed
and many-jointed; four scaleless wings; hind- wings
sometimes with long appendages; metamorphosis com-
plete.
This order includes a number of families which, with
others, made up the old order Neuroftera. It is but
poorly represented in Britain, but the exotic Plani-
pennia include some very interesting and a few decidedly
beautiful species.
SiALiDiE. —Four large membranous wings of approxi-
mately equal size; neuration simple; antennae long.
Species of this family are known as Alder-flies in
this country; inAmerica they are variously referred to
as Dobsons, Fish-flies, and Hellgrammites. Our com-
mon species, Sialis lutaria, may often be seen near
water in which its larvae dwell. It is a smoky -black
insect with prominently veined wings, spanning about
an inch and a half. The upper wings fold over the
lower in characteristic manner, and diverge at their
apices. Its head and thorax are broad, and when
128 INSECT LIFE
discovered it is more likely to seek safety by running
away than by taking to flight.
The can be summed up
life-history of the Alder-fly
in a few words.The female deposits her eggs upon the
leaves of some plant, which may or may not grow close
to the water. About a hundred cylindrical, elongated
eggs are laid in groups. When the larvae emerge, they
crawl to the nearest water without loss of time; there
they settle in the mud for about a year, and gain their
sustenance by devouring other aquatic animals. The
full-grown larvae measure about an inch in length; their
arge thoraces plainly show division into three segments.
Seven pairs of tracheal gills are appendages of the ten-
segmented abdomen; the last abdominal segment is
modified into a pointed double air-tube which acts as
a supplementary gill.
Pupation takes place in an earthen cell at some
distance from the water; the pupal stage lasts nearly
a month, then the membranous pupa-case is split and
the Alder-fly emerges.
The American Dobson, Corydalis cormita, does not
differ very markedly in its life-history from our native
species. Howard says that it has more popular names
than any other American insect. " They are: Dobsons,
crawlers, amby, conniption bugs, clipper, water gram-
pus, goggle goy, bogart, crock, hell devils, flipflaps,
alligators. Ho Jack, snake doctor, dragon, and hell
diver ."" We mention this, not because of its importance,
but because it serves to emphasize a
remark on another
page, that the entomologist should learn to rely on
scientific names, and not to bear upon the broken reed
of popular nomenclature.
 PLATE XVI

ORNITHOPTERA BROOKIANA See paiie 140.

1. Male i. Female
 ALDEK-FLIES 129

is an evil-looking creature with a wing-span

Corydalis
of more than four inches. The females have very
powerful jaws, capable of inflicting a severe bite; the
males, though more formidable-looking, with long,
curved jaws more than an inch in length, are really
harmless, and their jaws are used to hold the females
during pairing.
In one respect, inadvertently, perhaps, these insects
show more consideration for their young than do their
British relatives. Their eggs are always laid upon some
object overhanging the water, so that the larvse, when
they hatch, can fall which is
straight into the element
to be their home. These convex egg-masses, white and
chalky -looking, each contain about three thousand
minute eggs set on end. " Sometimes they are so
abundant as to make the rocks look as though someone
had splashed whitewash upon them profusely with a
brush." The larval life of C. cornuta lasts nearly three
years.
Kaphidiid^. — Closely allied to Sialidce ; head long;
prothorax long and tapering in front.
On account of the curious structure of their heads
and prothoraces, these insects are known as Snake-flies.
Very little has been learned of their life-histories; the
larvae live under bark and are exceedingly voracious;
the naked pupse, which closely resemble the adults,
except that their necks are not long, occur in the same
situations.
MANTispiDiE. — Hind- wings without an anal space;
front legs formed for grasping.
These insects receive their family name from their
remarkable resemblance to the MantidoB. Their necks
17
130 INSECT LIFE
are long, their fore-legs are similar to those of Mantis
but their wings, apart from many other characters,
show that they are not closely related to the insects
they simulate.
We have no British species of the family; so far as is
known, many of these insects appear to be semi-parasitic.
A South American species lives in Wasps' nests; a
European species preys upon Spiders and their eggs.
Each of their very small and very numerous eggs " is
placed at the tip of a long stalk, very much the same
way as are the eggs of the lace wing-flies. The eggs are
laid in the autumn and the larvae hatch before winter,
but remain hidden, without food, until spring. Then
they search for the egg-cocoons of certain spiders, pierce
them, and enter among the eggs. When the eggs are
nearly ready to hatch they eat them, and the young
spiders as well, until they are full grown, moulting only
twice and changing to pupae or nymphs within the
larval skin.""
CoNiOPTERYGiD^. —Minute insects with mealy wings.
These little white insects are remarkable for being
the smallest of the Planiyennia. Their larvae prey upon
Scale insects and A f hides, and are usually met with
upon conifers.
MYRMELEONiDiE. —Superficially resemble Dragon-flies,
but their bodies are shorter, their short antennae are
clubbed, and their fore- wings are devoid of nodes.
The life-story of the Ant Lion is known to most
people, though the insects themselves may be un-
familiar. The larvae of this family are among the most
curiousand interesting of all insects.
Sand is an essential to Ant Lions, for without sand
 ANT LIONS 131

their larvae could not form the pits which are essential
to their existence. The gauzy-winged females deposit
their eggs in the sand, and directly the larvae hatch
they lose no time in setting to work to construct the
traps which will provide them with food.
Needless to remark, the structure of the larvab differs
according to the species, but, speaking generally, they
are all somewhat flattened, almost circular six-legged
creatures, with flat heads and formidable jaws. It is
said that they scrape the sand on to their flat heads
with their fore -legs, and then, jerking their heads back-
wards, throw the load to some distance. The first
operation is the making of a circular groove in the

sand and the throwing away of the excavated materials.

More and more concentric grooves are made within the
original one, till the final operations result in the forma-
tion of a steep-sided pit, shaped like an inverted cone.
The larva then descends to the bottom of the pit and,
with the exception of his powerful jaws, buries himself
in the sand. Any small insect, finding itself on the
shifting sands of the pit-sides, promptly rolls to the
bottom, is by the
seized ever- watchful larva, its juices
are sucked from it, and its carcass is jerked from the
pit. A larger insect, on finding itself slipping to the
bottom of the pit, may make efforts to escape efforts —
which in ordinary circumstances would be successful.
The Ant Lion, however, is not so passive as he appears;
he showers sand upon the struggling insect and hastens
its descent.
Although larval Ant Lion habits have been witnessed
and described time and again, there is little reliable
information concerning the deposition of the eggs, the
132 INSECT LIFE
number of larval moults, pupation, etc. One fact is
known of a certainty: the larval period may be ex-
tended almost indefinitely, and its duration depends
largely upon tbe amount of food tlie individual is able
to obtain. Plentiful food shortens the time; long fasts
—and the Ant Lion, in common with most predaceous
can
larvse, inordinately lengthy periods — entail
fast for
a protracted larval existence. Silken cocoons are spun
in the sand by the fully fed larvse; they are always
studded with sand.
Hemerobiid^. —^Very similar to Myrmeleonidce , but
their antennae are beaded.
These insects are called Aphis Lions, for the reason
that the larvse of many species prey upon Aphides. It
is another family concerning which very little is known.
The largest of the British Planipennia, Osmylus
fuhiceflialus, belongs to this family. Its broad trans-
parent wings span nearly two inches, the fore-wings
are slightly spotted with brown, and it frequents the
neighbourhood of streams, for its larvse are semi-aquatic.
Larvse of the genera Climacia and Sisyra are also
aquatic in their early stages.
The most interesting feature concerning the terrestrial
larvse of the HemerobiidcB is the curious habit possessed
by some of them of ornamenting their bodies with the
skins of their victims. All the land-dwelling larvse are
active, voracious creatures; all have long, powerful,
grooved jaws. Their prey is seized in the jaws and the
life-juices sucked therefrom through the grooves. Many
of the larvse are ornamented, over their backs and sides,
with bristle-covered tubercles. Species so clothed take
great pains to disguise themselves by firmly attaching
 PLATE XVII

ORXITHOPTERA HEPH.-ESTUS See pat/e 140.

1. Male 2. Female
 LACEWINGS 133
the remains of their insect food to the tubercles; no
Red Indian ever gathered scalps more assiduously than
some of these insects collect the remains of their feasts;
heavily laden larvae cannot be recognized as insects.
Chrysopid^.—Characters very similar to Hemero-
but antennae bristle-shaped.
biidcB,

The delicate Lacewings or Golden Eyes are familiar

to most people. Their pale green, filmy wings, their
slender bodies, their long setiform antennae, and their
brilliant metallic-looking eyes, render them unmis-
takable. Despite their delicacy and beauty, they can
emit a most unpleasant odour, a habit which has earned
them the name of " Stink-flies " in some quarters.
Several species of Chrysopa are common in Britain,
and the life-history of C. vulgaris may be taken as
typical ofthem all The female lays her eggs in clusters,
.

usually upon a leaf, almost invariably amongst a colony

of Aphides. The eggs are worthy of particular atten-
tion. Each egg is raised from the leaf-surface upon a
thin stalk; the egg-mass resembles a number of minute
pins piercing the leaf-surface. The eggs are not of this
peculiar form without good reason; all Chrysopid larvae
are exceedingly voracious, none of
them object to feeding
upon their own kind, so that, were the eggs of more
ordinary mould, the young larvae, when he entered the
world, would make his first meal of his still unborn
relatives. The stalked eggs prevent such a catastrophe.
The larva emerges by biting a hole in the top of his
egg; he descends to the leaf, and at once begins to prey
upon the Af hides which surround him. His jaws are
hollow and powerful, like those of the Hemerobiid
larvae; he seizes his prey in the softer portions of their
134 INSECT LIFE
bodies and sucks tliem dry. Some non-Britisli species
possess the habit we have just described of ornamenting
their bodies with the remains of their victims. The
Chrysopid larva, whatever its species, " always seems
hungry and always to be feeding when it can find any-
thing upon which to feed, and its rapidity of growth is

limited only by the abundance of the food-supply.'*

Vulgaris, when fully fed, is about half an inch long and
of a peculiar pinkish colour.
The cocoons are of silk and nearly globular; the
larval spinnerets are situated in the tail, and the jaws
are used to arrange the silk in position. When the
adult Chrysopa emerges, the top of the cocoon up lifts

and remains attached to the base like a lid. Few

insects are more beneficial than the Lace wings; un-
fortunately, they are much preyed upon by parasites.

Order Trichoptera, or Caddis-flies.

Antennae long and slender; four hairy wings; mouth-
parts not fully developed; tarsi usually five-jointed;
metamorphosis complete.
With the majority of orders the perfect insects are
more familiar than the larvae; here the reverse is the
case. Everyone knows the curious larval cases of these
insects; few have seen or recognized the moth-like
**
flies."' The order has been strangely neglected by
entomologists, and there is a considerable diversity of
opinion as to its proper subdivision. It may be well
to study the typical life-history of a Caddis before
considering the peculiarities of the various families.
The female lays her eggs during the summer in a
mucilaginous mass, and they are usually, though not
 CADDIS-FLIES 135

invariably, attached to a water-plant. These egg-

masses may assume varied forms according to the
species: they may be disc-shaped, rope-hke, or horse-
shoe-shaped; green they always are, owing to the
colour of the eggs, which shows plainly through the
mucilage.
In than a month the larvse emerge, and, being
less
soft-bodied and a likely prey for voracious creatures,
they lose no time in constructing their dwellings of
leaves, sticks, shells, sand, or similar material, and they
are always characteristic of the species. The case, what-
ever its design, is so made that the larva need never
expose more of its person than its horny head and
thorax. Kespiration is performed by means of nine
pairs of tracheal gills, and the larva keeps its place
within its home by means of a pair of formidable re-
curved hooks on the end of its body and by three fleshy
protuberances, capable of retraction and extension, on
the first abdominal segment.
The larvse, with the exception of those of one group,
are all vegetable-feeders; their existence continues
through the winter, pupation taking place in the spring.
When about to pupate, the larva spins a silken web at
either end of its case, and, thus secure from its enemies,
it passes into the next stage. The Caddis pupa is an
extraordinary creature and quite unlike the " fly."' It
is white; its legs, wings, and antennae are free; upon

its abdomen are respiratory organs; and its mouth is

armed with powerful mandibles. The latter organs are

used to bite a way through the ends of the case when
the time of emergence arrives. Then the semi-active
pupa floats to the surface of the water, climbs to some
136 INSECT LIFE
near-by plant, its pupal skin, along with the formidable
mandibles, is shed, and the Caddis-fly emerges with
startling rapidity. Of a pale greenish hue at first, the
insect soon assumes the grey, brown, or black colouring
common to British Trichoftera.
Phryganeid^. —Distinguished by having four spines
on middle tibiae; three ocelli.
This family contains the largest of the Trichoftera.
The larvae all construct cylindrical cases of spirally
arranged material; the cases are open at both ends.
Our common Phryganea grandis is a brown insect,
measuring two inches in wing-span. Its larval cases
are made of minute fragments of leaf cut by the larva,
and arranged in a spiral manner to form an open-ended
cylinder. Some of the Asiatic species are quite ornate;
a Japanese Phryganea has yellow-bordered brown hind-
wings; an Indian species has purple hind- wings, tipped
with yellow.
LiMNOPHiLiD^. —Two or three spines on middle
tibia); three ocelli.

A family with very varied larval cases. Many species

construct their cases, wholly or in part, of small Water-
Snail Sometimes these shells contain living
shells.

Snails,which "are afforded comparatively rapid trans-

portation, whether they desire it or not.'' The British
Limnofhilus flavicornis has this habit; L. rhomhicus
arranges small sticks transversely to form its cylindrical
case; other species of the genus construct their cases
of sand.
To this family belongs the only non-aquatic Caddis-
fly larva; it frequents damp moss, often at the bases of
trees far removed from water.
 PLATE XVni

2. Lasiocampa trifolii 3. Thais polyxena

5. Terias simulata (i Pararge macra
7. Papilio podalirius
8. Colias phicomene 9 Tliecla rubi 'underside' 111. Gonopteryx cleopatra
 CADDIS FLIES 137

EHYACOPHiLiDiE. —Male palpi five-jointed; last two

joints of palpi not flexible.
The larvae of this family all frequent running water,
and in consequence they all make cases, which they
attach to rocks by means of silk. None of the cases
are of a very elaborate nature, and are all very similar
to those of the common Steno'phyhx. The pupse of
Rhyaco'phiUdce are protected by thin but tough brown
cocoons.
—
Hydroptilid^. Male palpi four-jointed; no spurs
on anterior legs; no ocelli.
The smallest of the TricJioptera. The larval cases
are made of silk, studded with grains of sand, and have
an opening at each end. The larvae probably breathe
through their skins, for they have no visible breathing
organs.
SERicosTOMATiDiE. —As HydroftiUdcB, but spines on
anterior legs.
The flies are very hairy; their larvae live in running
water, but they construct free cases of sand or pebbles,
some of them very closely resembling helical Snail-
shells.
Leptocerid^. —Last joint of palpi long and flexible;

base of antennae long and large; no ocelli.

The species are conspicuous on account of their very

long antennae; the larvae usually live in running water,
and build cylindrical, slightly carved cases of sand.
—
Hydrops YCHiD^. Similar to Leptoceridce, but an-
tennae shorter and wings broader.
These are the only carnivorous TricJioptera ; they
live inrunning water, and the fixed larval cases are
formed largely of silk. The larvae of Plectrocnemia
18
138 INSECT LIFE
build funnel-shaped hiding-places with silken webs
about the entrance, very similar in design to the Broad-
land Duck decoys. Insects caught in the webbing are
eagerly devoured by the Caddis larvse.

Order Lepidoptera, or Butterflies and Moths.

The Lepidoptera are four- winged insects, and in the
majority of cases their wings are covered with scales;
bodies with scales having the appearance of hair;

Fig. 5.

A, Piece of wing of the White Cabbage Butterfly (much magnified to show

the scales). R, Margin of wing; the scales covering it are very long.
The dark scales are of black colour, the hght ones white. B, A scale
(more strongly magnified). It is fixed by a small peduncle in a
depression of the wing membrane, F.

mouth-parts of adults adapted for imbibing liquids,

never for piercing or biting; larvse with biting mouths;
metamorphosis complete
The order is subdivided into two series:
 PLATE XIX

2 Papilio sarpedon 3. Uismorphia nemesis

1. Epicalia numilia
Menelaides hector 6. Callidryas neleis
4. Clilorippe cherubima 5.
8. Papilio ganesa 9. Ageronia velutina
7 Junotiia orythia
 BUTTERFLIES 139
Series 1. Rhopalocera, or Butterflies, with knobbed
antennae or swellings towards the tips of these organs.
Usually diurnal.
Series Moths, with antennae which
2. Heierocera, or
are very rarely knobbed. Usually nocturnal.
With the exception of a few aberrant forms, there
are few Butterflies or Moths which even children cannot

Fra. 6. Head of the White Cabbage Butterfly (Magnified),

AND ON THE LeFT A PORTION OF THE PROBOSCIS (MORE HlGHLY
Magnified).
F, Antennae; A, eye; R, proboscis; Lt, labial palpi.

recognize as such. Owing to their brilliant colouring,

their active habits, and, in many species, their large
**
size, they are familiar objects everywhere. In respect
of intelligence the order is inferior to the Hymenoftera ;
in the mechanical adaptation of the parts of the body
it is inferior to Coleoptera ; and in perfection of meta-
morphosis it is second to Diptera,"
140 INSECT LIFE
Despite the fact that one of the most useful of all

insects, the Silkworm, belongs to this order, the Lepi-

doptera are decidedly injurious. With a few unim-
portant exceptions, the larvae are all vegetable-feeders;
many of the species are prolific, and in consequence
crops are frequently ruined by the depredations of the
immature insects.
The adults are harmless, as a rule; their mouth-parts
are only adapted for imbibing nectar and similar liquid
food. There are, it is true, one or two species with
peculiar and noxious habits; a species of Noctuid, for
instance, is in the habit of drinking its fill from the
eyes of cattle, and, as it passes from one beast to another,
it is presumed to transmit ophthalmia.

Though no order has been more assiduously hunted,

captured, and preserved than the Lepidoptera^ it is
remarkable that, up till quite recently, less real scientific
knowledge of these insects had been acquired than of
many other less attractive orders. It is small wonder
that Butterflies and Moths have been much sought after
by collectors. Some are drab, some bizarre, but the
majority are of surprising beauty. They owe their
attractiveness to the scales, arranged slate-wise, on their
wings, and, in the typical Lepidoptera, the wing-expanse
is large compared to the insect's body. It has been
estimated that there are as many as one and a half
million scales on the wings of some species. Each scale
is a little flattened, bag-like structure, stalked at its
base,and fitting into a cup-shaped cavity on the wing-
membrane.
One of the most interesting phenomena connected
with Lepidoptera is the *' seasonal dimorphism " of
 PLATE XX

VANESSA URTIC-E (SMALL TORTOISESHELL)

Ova, larvae, pupae and imago
 BUTTERFLIES 141

certain species. This has been fully described elsewhere

(p. 26), but it is of the greatest interest to the scientist
and often the cause of much trouble to the collector.
Mimicry, also, is very common in this order, but this
phenomenon is also referred to on another page (p. 47).

Series 1. Rhopalocera, or Butterflies.

Although the series is a large one, it is curiously

uneven in its distribution South America is particularly
.

rich in Rho'palocera ; New Zealand, with less than two

dozen species, particularly poor. We have rather more
than sixty native species, practically all of which we
are fortunate enough to be able to illustrate in colour.
—
Nymphalid^. Front pair of legs small; tarsi of
male with one joint, of female with five; claws absent.
Pupae pendulous; larvae either spined or smooth, but
even in the latter case the head bears spinous appendages.
There are eighteen species of this family native to
Britain; it includes the Fritillaries, the Red and White
Admirals, the Peacock, the Tortoiseshells, and the
somewhat aberrant Purple Emperor. Among the exotic
species of the family are the Leaf Butterflies, Kallima
spp., and the South American species of Ageronia, with
the un-Butterfly-like habit of making a noise.
In point of numbers the genus Vanessa far exceeds
all others in this country. The Small Tortoiseshell,
Vanessa urticce, is the commonest of all our Butterflies,
and it is of the greatest interest to the biologist. It is

usual amongst the Lepidoftera for the females to lay

their eggs and leave them to their fate. In some species
the winter passed in the egg stage; others, again,
is

may elect to winter as pupae, and there are species with

 142 INSECT LIFE
hibernating larvae. The Small Tortoiseshell, however,
is original, for the adults themselves hibernate, becoming
active again in early spring, maybe before the nettles,
food-plants of their larvae, are far above ground, but
knowing instinctively that they will be well advanced
before the hatching of the spring-laid eggs. The Large
Tortoiseshell, F. polychloros, whose larvae feed upon
elm, cherry and willow, is less common, and, though
very similar to its smaller relative, a comparison of our
two figures will show that the careful entomologist need
never confuse the species.
The Peacock Butterfly, F. io, an aptly named insect,
is too common to need description; its larvae feed upon
nettles. Another nettle-feeder is the Red Admiral,
F. atalanta, one of the most beautiful of our native
butterflies. Its habits are the subject of some con-
troversy and by many it is presumed that we are in-
debted to the Continent for our annual supply of this
insect. It is certain that the migratory habit is by
no means uncommon amongst the NymphalidcB, and
in no species is the nomadic instinct more pronounced
than in the Painted Lady F. cardui which has spread
and is still spreading to distant regions of the world.
Its larvae may be taken on thistles, nettles, and various
other food-plants. The Comma Butterfly, Y . c. album,
may easily be distinguished from all the other native
species of the genus by the indented outline of its wings.
When in repose, it approaches most nearly to the dead-
leaf mimics by the colouring of its lower wing-surfaces.
Its larvae are not confined to one food-plant, as is so
often the case; they feed on nettles, hops, willows,
sloes, elm, and even gooseberry.
 PLATE XXI

1 Vanessa atalanta (Red Admiral Vanessa cardui (Painted Ladyl

Annsia erippus (Milk Weed)
.'1

imemtis sihylla White Admiral

I
5. ApatLira iris (Purple Emperor)
 BUTTERFLIES 143

The rarest of all our Vanessas is the Camberwell

Beauty, V. antiopa, a summer visitant to these islands.
It is an insect of striking beauty and commanding size
well-grown specimens may measure well over three
inches in wing-span.
Lack of space forbids more than a passing mention
of our native Fritillaries. The larvae of the Pearl-
Bordered and Small Pearl -Bordered Fritillaries, Argynnis
eufhrosyne and A.selene,Sind of the Queen of Spain, the
Dark Green and High Brown Fritillaries, A. lathonia,
A. aglaia, and A, adifpe, all feed upon species of
Viola. Those of the Silver-Washed Fritillary, A.
pa'phia, feed on wild raspberry as well as upon Viola ;
and those of the Greasy, Glanville, and Heath Fritil-
laries, Melitcea aurinia, M. cinxia, and M. athalia^

feed upon the narrow-leaved plantain, the first-named

also favouring scabious, foxglove, and speedwell.
The White Admiral, Limenitis sihylla, becomes more
and more rare each year. Its larvse, which may be
looked for on honeysuckle, are gaily clad green creatures
with red heads and reddish spines. The Purple Em-
peror, Afatura iris, is a handsome insect which may
be looked for on oaks. Its larvae feed upon willows
and poplars, and they are quite characteristic. They
are slug-like in form, green in colour, and armed with
a pair of horns on their heads. They hibernate
through the winter, and in consequence the period of
pupation is much reduced in this species.
The Dead-Leaf Butterflies are wonderfully interesting
from the fact that when at rest they very closely
resemble dried leaves. When they settle they place
their wings close together in a vertical position; their
144 INSECT LIFE
under-sides, in contrast to their upper surfaces, are a
dull brown colour. Each hind-wing bears a short tail,
and these tails, placed together and resting on the
twig upon which the insect has elected to settle, simu-
late a leaf-stalk. The deception is heightened by a
dark line which runs from the tail to the tip of the
fore-wing; nothing could resemble more closely the
midrib of a leaf. One would imagine that the mimicry
could be carried no further, but on each wing there is
an " eye,'' consisting of a transparent spot, destitute of
scales. When Kallima folds its wings, the eyes coincide,
so that a semi-opaque patch is left right through the
wings of the resting insect, just such a patch as might
be found on a leaf from which some creature had
gnawed a portion.
EKYCiNiDiE. —
Females with six perfectly formed legs,
though the front pair are smaller than the others.
Coxae of fore-legs on the male form a spine, and the
unjointed tarsi are devoid of claws.
This is largely a tropicalAmerican family; there is
only one European species which is found in Britain

the Duke of Burgundy Fritillary, Nemeohius lucina,

which is not a true Fritillary. It may easily be identified
from our figure, and its larvae may be sought on primrose.
—
Danaid^. Front foot of female ending in a corrugate
knob; larvae smooth with fleshy protuberances.
These Butterflies are nearly all large insects and
boldly marked. None of them are native to Britain,
though Anosia eripfus, an American species, known
as the Milkweed Butterfly or the Monarch, has occa-
sionally been taken in this country. Its larvae feed
upon Asclepias,
 PLATE XXII

WW
1
2
3.
4.
Melitea cinxia Glanville Fritillary-
iMelita;a athalia (Heath Fritillary
Vanessa
Vanessa
c. album Comma)
urticae (Small TortoiseshellJ
5.
6
7.
Vanessa polychloros (Large Tortoiseshell)
Vanessa antiopa (Camberwell Beauty)
\'anessa io vPeacock)
 BUTTERFLIES 145

SATYRiDiE. —Palpi prominent; the veins at the base

of the fore- wings often swollen.
There are eleven British species of Satyridce, all of
which are figured and are easily identifiable. Their
larvae all feed upon grass, and the adults, though
provided with large wings, are generally poor per-
formers in the air. Many species of Satyridce frequent
highlands; the Marsh Ringlet, Gcenonym'pha typJion, is

only at home in sphagnum bogs and similar situations,

whilst the Grayling, Satyrus semele, is a lover of the
sea-shore.
MoRPHiD^. —A purely tropical family, noted for the
brilliant hues of species belonging to the tropical Ameri-
can genus Morpho. The larvae of many species are
gregarious.
—
Brassolid^. A small South American family with
somewhat moth-like habits. The enormous larvae of
Caligo eurylocJius are green in their early stages ; accord-
ingly they take up their residence on the similarly
coloured leaves of the banana. As they approach
maturity they become brown, and then retire to the
dead leaves of the same plant.
—
Heliconiid^. Another tropical American family,
mentioned here because the individuals of one species,
Heleconius erato^ exhibit the exceedingly uncommon
phenomenon of " trichroism " —
that is to say, indi-
viduals of the same brood may be any one of three
colours. In this particular case the hind-wings of these
Butterflies may be either green, blue, or red.
—
Lyc^nid^. Front legs almost as large as the others;
male tarsus one- jointed and terminated by a single
claw without teeth.
19
146 INSECT LIFE
The family includes the well-known " Blues " and
*'
Hairstreaks/' The larvse of some of the former are
said to be carnivorous, feeding upon Green-flies and
Scale insects. The pupse, like those of the Nym'phalidcB,
hang downwards from their support, but they are
usually still further supported by a silken thread which
surrounds the centre of the pupa and is fixed to some
object near-by.
There are eighteen British species of this family, of
which the Large Copper, Polyommatus dispar, is now
but a memory, the last native specimen having been
taken in Norfolk about sixty years ago. The Small
Copper, P. pJilceas, is still common; its larvae feed on
sorrel.
**
Of the Blues,'" ten species are figured. The Long-
Tailed Blue, Lyccena bcetica, cannot really be classed
as a native species, but should rather be considered as
an occasional visitor. It occurs in many parts of
Europe, Africa, Asia, Australia, and the West Indies.
The Common Blue, L. icarus, is known to everyone,
its larvaefeed on clover. A very similar insect is the
Clifden Blue, L. hellargus. The Chalk-Hill Blue, L.
corydon, as its name implies, is confined to chalk soil.

The Silver-Studded Blue and the Azure Blue, L. cegon

and L. argiolus, are of distinctive hue; the larvae of
the former feed on leguminous plants, those of the
latter on the flowers of ivy, holly, or buckthorn. The
Mazarine Blue, L. semiargus, is exceedingly rare; its

larvae feed upon thrift, and, as may be surmised, the

insectis to be sought by the seaside. The Little Blue
and the Large Blue, L. minima and L. arion, may be
recognized by the fact that they are respectively the
PLATE XXiri
 BUTTEEFLIES 147

smallest and the largest of our Blues. The larvae of

the former feed on leguminous plants, those of the
latter on wild thyme. The Brown Argus, L. astrarche^
is brown in both sexes; its larvae feed on Helianthemum.
The five British Hairstreaks are all dull-coloured on
the upper surfaces of their wings; for their identifica-
tion it is necessary to examine them below. The
Purple Hairstreak, Tliecla qiiercus, is the commonest
species,and the Black Hairstreak, T. fruni, the rarest.
The larvae of the former feed on oak, those of the latter
on the same tree or on sloe. The Green Hairstreak,
T. ruhi, is the smallest species of the genus in Britain.
For so drab an insect as this appears to be when its
upper surface alone is viewed, its brilliant green under-
surface is somewhat surprising. Its larvae may be
taken on bramble and broom. The Brown Hairstreak,
T. betulcB, is the largest British species, and the White
Letter Hairstreak, T. w. -album, is easily recognized by
the white letter iv at the basal angle of the under-side
of each hind- wing. Its larvae feed on elm; those of
betulcB prefer birch or blackthorn. These curiously
named Butterflies are so called on account of the
narrow, pale-coloured lines which traverse the lower
surfaces of their wings.
PiERiD^. —All the legs well developed in both sexes;
claws are toothed.
This family is remarkable for the small colour varia-
tion which occurs in the different species. Nearly all

of them some shades of yellow or red or

are decked in
white combined with black. The larvae of most species
are green and smooth, or clothed with a fine pubescence,
though those of the Orange Tip, Euchlo'e cardamineSj
148 INSECT LIFE
are armed with forked bristles when young, which give
place to fine hairs later.
Of our ten British species, the Large and Small
Whites, Pieris hrassicce and P. rafce, are familiar even to
dwellers in large towns. Their larvse feed upon cruci-
ferous plants. The Green-Veined White, P. nafi^ is
equally common, but not in towns; Cardamine spp.
provide food for the larvae. Two rarities of this family
are the Bath White, P. daplidice, and the Black-Veined
White, Aforia cratwgi. The small, fragile, Wood
White, Leucofhasia sinapis, w^hose larvae feed on
leguminous plants, cannot be mistaken for any other
Butterfly. The Clouded Yellow and the Pale Clouded
Yellow, Colias edusa and C. hyale, are quite distinct,
despite their similarity of name. They are strong fliers

and of migratory tendencies; their larvae feed on

Leguminosw. The Brimstone, Gonepteryx rJiamni^ is

an elegant insect w^hich is easily recognized, among

British Lepidoptera, by its form quite apart from its

colouring. The tips of its fore-wings are curved out-

wards and terminate in an acute angle; its hind- wings
are slightly tailed. The females hibernate through the
winter and deposit their eggs on buckthorn in the spring.
—
Papilionid^. All legs well developed; claws large
and not toothed; front tibiae padded.
These are the most ornate of all the Butterflies, the
males of some species being truly dazzHng in their
brilliance, whilst the females are comparatively dull-
coloured. Beautiful velvety blacks relieved with bril-
liant greens and blues and gold are the predominating
colours amongst the males of the ornate genus
Ornithoptera,
 PLATE XXIV

1 Colias edusa (Clouded Yellow) 5, Argynnis adippe (High Brown Fritillary)

2.Goneptoryx rhamni (Brimstone^ C. Arygnnis lathonia (Queen of Spain Fritillary"!
3 Argynnis paphia (Silver-washed 7 Argynnis selene (Small Pearl-bordered Fritillary)
p-ritillary) 8. Argynnis eiiphrosyne (Pearl-hordered Fritillary)
4 Argynnis aglaia (Dark Green Fritillary) 9 IMclita'a aurinia (Greasy Fritillary)'
 BUTTEKFLIES 149
Most of the Swallow-Tails, as the Papilionidce are
called, are South American, nearly all are tropical. In
Britain we have but a single species, Papilio machaon^
and it is by no means common. It is one of our largest
Butterflies, and cannot be mistaken for any other
insect. The larvae, which feed upon the leaves of
carrot, fennel, and the like, are as beautiful as the
adults. They are green, with belts of black, and the
belts are studded with crimson. The pupse of all the
Papilios are affixed head upwards, the reverse of the
rule amongst the Nymphalidce.
—
Hesperiid^. Six walking legs, the front legs not
short; stout short claws; tibiae padded.
The Butterflies of this family are known as
" Skippers,'' on account of their short, rapid, and
jerky flights. As a family they are somewhat puzzling;
they resemble Moths rather than Butterflies in many
respects, and the general consensus of opinion is that
they form a connecting link between the Rhopalocera
and the Heterocera. Some entomologists would place
them in the latter series.
There are eight British species, all of which are
figured in colour. Confusion is likely to arise between
the Small Skipper, Hesperia thaumas, and the New
Small Skipper, H. lineola ; the larvae of both species
feed upon The Lulworth Skipper, H. actceoUy
grasses.
is very and is confined to a few localities in the
local,
South-West. The Checkered Skipper, Cceterocephalus
palcemon, is even more uncommon. The Large Skipper,
H. sylvanus, is by no means uncommon and easily
recognized, though it is not very dissimilar to the
smaller, rarer Pearl Skipper, H. comma. The Dingy
150 INSECT LIFE
and Grizzled Skippers, Nisoniades tagos and Syrichthus
nialvcB, are very distinctive.
All the Skippers have the peculiar larval habit of
rolling leaves in which they live; pupation also takes
place in the same shelters.

Series 2. Heterocera, or Moths.

The classification of Moths is by no means satisfactory.

This is hardly the place to enter into a discussion on
the subject; as far as possible, the arrangement here
follows the lines of the collection of Heterocera in the
London Natural History Museum.
—
Castniid^. Antennae knobbed or hooked.
These Moths are nearly all confined to tropical
America and Australia. They are diurnal, and bear a
very close resemblance to the Skippers; some of them
are agricultural pests.
—
Satukniid^. These are the Atlas Moths, and con-
tain some of the largest examples of Lepidoftera. The
North Australian, Coscinocera hercules, " is a huge Moth,
which, with its expanded wings and the long tails
thereof, covers a space of about seventy square inches."
Nearly all the species are remarkable by the posses-
sion of large transparent areas on their wings or circular
eye-like markings. They are the Moths whose larvae
spin the coarse Tussore silk.

Our only British representative of the family, the

Emperor, Saturnia pavonia, is one of our largest native
Moths, but one of the smallest of the Saturniidce. It is
to be found usually upon heather, the plant upon which
its larvsB feed. The latter are as beautiful as the Moths,
being bright green studded with red protuberances.
PLATE XX\'
 MOTHS 151

BoMBYCiD^. —Moths without a proboscis.

A family of uninteresting but useful Moths; they are
the true Silkworms.
The Silkworm, Sericaria mori, is a native of Northern
China. been domesticated that it has
It has so long
practically lost the power of flight.
—
EuPTEKOTiD^. A family which contains the remark-
able Processionary Moth, Cnetliocamfa frocessionea,
whose larvae march in columns, each one headed by a
leader.
The larvae of Palustra, a South American genus, are
aquatic, being helpless on dry land.
Sphingid^.—Hawk Moths. These insects are of
large or moderate size; most of them are possessed of
a long proboscis; their wings are never large and usually
narrow; antennae stout.
The members of this family all possess a very charac-
teristic appearance which renders them distinct from
all other Moths. Our largest native Moth, the Death's
Head, Acherontia atropos, belongs to the family. It
derives its name from the markings on its thorax. The
larvae feed on potato-plants, and, were they more
common, they would be classed as injurious insects.
The adults can make a noise, when at rest, by rubbing
their palpi against their proboscis. The Convolvulus
Hawk Moth, Sphinx convolvuli^ is more often taken
than the Death's Head; it is the most sombre of our
Sphingids. Somewhat similar is the common Privet
Hawk Moth, Sphinx ligustri, w^hose larvae feed on the
plant from which the Moth derives its name. The
Spujge and Bedstraw Hawk Moths, Deilephila euphorhicB
and D. galii, bear considerable resemblance to one
152 INSECT LIFE
another, but not so much so that they cannot easily be
distinguished. Both our native species of Elephant
Hawk Moths, the Large Chcerocam'pa elfenor and the
small G, forcellus, feed on bedstraw in the larval stage;
the former also eats willow-herb. The Eyed Hawk
Moth, Smerinthus ocellatus, is easily recognized by the
**
eyes " on its hind- wings; no other British species has
these markings. Its larvae should be looked for on
willows and poplar. On the same trees may be found
the larvae of the Poplar Hawk Moth, Smerinthus populi,
which possesses particularly broad wings for a Sphingid.
The Humming Bird Hawk Moths are always provided
with an expansible tuft or tufts of long, hair-like scales
on the tip of their abdomen. Our native species,
Macroglossa stellarum^ is quite common in certain
seasons. Its larvae feed on bedstraw. Quite distinctive,
with its clear wings, is the little narrow-bordered Bee
Hawk Moth, Macroglossa fuciformis, whose larvae should
be sought on scabious.
—
NoTODONTiD^. Very closely allied to the Noctuidw,
and remarkable for the curious forms assumed by many
of the larvae.
We have nearly two dozen native species, of which
the Puss Moth, Dicranura vimda, is the best known.
The larvae feed upon willows, and curious-looking
creatures they are. In their young stages their heads
are of moderate size, two protuberances project above
the head, a single hump on the forward half of the back,
and the tail is long and forked.
As they grow older,
their heads assume large proportions, and from the
forks of the tail two long,whip -like structures can be
ejected; their object is presumed to be for the protection
 PLATE XXVI

WM
Melanargia galatliea (Alarbled White
Erebia epipliron IMountain Ringlet
Krebia aethiops iScotch Argus!
Pararge aegeria Speckled Wood)
Pararge megsera AN'all Brown)
r>.

7.
8.
9.
10.
Satyrus semele (Grayling)
Epinephele janira (Meadow Brown")
Epinephele tithonus Small Meadow Browi
Epinephele hyperanthus (Ringlet)
Ccenonympha typhon (Marsh Ringlet)
See pages 144 ami loo.
 MOTHS 153

of the larva from enemies. The cocoons of the Puss

Moth are hard and formed of wood chips and saliva.
When the time arrives for the Moth to emerge, it softens
its prison wall with an alkaline fluid and pushes its

head, which is protected by a portion of the pupa-case,

through the softened part.
More peculiar still is the larva of the rare Lobster
Moth, Stauropus fagi, which the lucky entomologist
may find on young beech-leaves. The Dragon of old
Sepp, Hyhocampa milhauseri, has larvae equally bizarre.
Commoner British species are the Coxcomb Prominent,
Lophopteryx camelina, with curious larvae which feed
on birch. On the same tree may be found the red
and yellow larvae of the Iron Prominent, Notodonta
dromedarius, whilst those of the Swallow and Pebble
Prominents, N. dictcea and N. ziczac^ feed upon poplar
and willows. The Buff Tip, Phalera biicephah, is our
commonest Notodont, and a fairly destructive forestry
pest of oaks. The Chocolate Tip, P. curtula, is less
common and much smaller; its larvae devour poplar
and sallow.
Cymatophorid^. —Closely related to the Noctuidce,
though bearing many resemblances to the Notodontidce,
this small family is represented in Britain by three species.
The Buff Arches, Thyatira derasa, is a quaintly
marked little Moth whose larvae feed upon Euhus spp.;
on the same plants may be found the larvae of the
Peach Blossom, T. hatis. The Yellow Horned Moth,
Asphalia flavicornis, may often be overlooked, for,
evidently recognizing that its colouring is protective,
it on tree-trunks and old wood.
rests Its larvae feed
on birch and oak.
20
154 INSECT LIFE
Sesiid^. —Clearwings. The majority of species in
this family have wings without scales, and many have

the tip of the abdomen tufted.

The commonest British species is the Currant Clear-
wing, S. tifuliformis ; less common is the Hornet
Clearwing, Trocliilium crahroniformis . The larvae of
these species are white, and they burrow into the stems
of their food-plant immediately after they are hatched.
Hidden within this shelter they spend the whole of
their larval and pupal lives.
—
Zyg^nid^. Burnet Moths. The commonest British
species of this family of beautiful Moths is the Six-
Spotted Burnet, Zygcena fili'pendnlcB. All the members
of the family have somewhat similar brilliant metallic
colouring, crimson and greens or blues predominating.
The Six-Spotted Burnet is a seaside species. Less
common is the scarce Forester, I no glohularice, a little

gem, resplendent in bronze or blue-green. Its larvae

feed upon the greater knapweed.

All the Burnet Moths construct peculiar cocoons,
which they fasten securely to some support such as a
grass stem; they are remarkable for their great powers
of movement. The pupa forces itself partly from the
cocoon at the time of the emergence of the Moth.
—
PsYCHiD^. Bagworm Moths. For the most part
small Moths, they are of the greatest interest. The
females are wingless, and in some species they are
devoid of legs as well, so that they appear like the
larvse of Diptera.The males are usually provided with
bipectinate antennae.
The females live all their lives within " bags "'; there
also they lay their numerous eggs, and the larvae, when
 PLATE XXVI

HWp

1.
2.
3
4
5.
6.
w
Cfenonymplia pampliilus (Small Heath)
Thecia riibi (Green Hairstreak)
Thecia quercus (Purple Hairstreak)
Thecia w-albiim (White-letter Hairstreak)
Thecia pruni (Black Hairstreak!
Thecia betulae (Brown Hairstreak)
7.
8.
9. I.
w
PBlyommatus dispar (Large Copper)
Polyommatus phteas (Small Copper)
ycaena gaetica (Long-tailed Blue)
10. Lycaena/Egon (Silver-studded Blue)
IL Lycaena astrarche (Brown Argus)
12. Lycaena icarus (Common Blue)
 . MOTHS 155

they emerge, start life by devouring the body of their

mother. Having done so, they feed no more till they
have constructed the " bags " in which they are to
live. These " bags '' vary in form and texture accord-
ing to the species constructing them. Sometimes they
are made of silk; more frequently of sticks or other
vegetable material or earth. They are always in-
genious. In one species the " bags " resemble shells,
but the usual form is a variant of a helix. The sticks
of which some of the bags are made are all of the same
length, sometimes arranged longitudinally, more often
transversely, but always with a regularity and neatness
which no human fingers could excel. When the larva
has made its " bag " it crawls inside, and there spends
the rest of its days, if it be destined to develop into a
female. The males are active and short-lived.
—
CossiD^. The Goat Moths have no proboscis, are
covered with a dense vestment of scales, and are all
either moderate or large-sized insects.
These Moths are of interest on account of the wood-
boring habits of the larvae and their protracted existence
in this state. The Goat Moth, Cossus ligniferda,
deposits her eggs upon the trunks of willow, poplar,
ash, or elm, for choice, and the young larvae, directly
they are hatched, bore into the stems and dwell therein
for three years. When fully fed, they are of consider-
able size, nearly the colour of a boiled prawn, with a
broad mahogany stripe down the back. They exude
an odour strongly reminiscent of that of the goat, and
for this reason they have earned their popular name.
It is reputed that in former days these evil-looking
larvae were considered a table delicacy, though it is
156 INSECT LIFE
hard to believe the truth of the statement. When fully
fed, the larvae leave their burrows and seek a spot for
pupation. They make a hard cocoon of chipped wood
and saliva. It is easy to imagine that larvse so large
and long-lived are capable of doing considerable injury
to timber trees.
Hardly less injurious are the larvae of the Wood
Leopard Moth, Zeuzem fyrina. They are long-lived
and have the same wood-boring habits as Cossus.
Fruit-trees are much favoured by them. Fortunately,
they are not very common.
Hepialid^. —
Ghost and Swift Moths. The species of
this familyvary tremendously in size some might aptly
;

be described as minute; others span as much as seven

inches from tip to tip of their wings. In colour they are
usually sombre, but some of the exotic species, on the
contrary, are gorgeous. The South African Leto venus
has wings studded with metallic spots; species of the
Australian genus Charagia are also brightly coloured.
Of our British species, the Northern Swift, Hepialus
velleda, is by no means uncommon; it should be sought
among the bracken, on which the larvae feed. Here
it may be mentioned that all the Hepialids are difficult

to capture; their flight is low and rapid. More difficult

still is it to obtain perfect specimens. The Gold Swift,
H. hectus, is a much smaller insect, also found near
bracken. The Ghost, H. pumuU, is the commonest of all.
The larvae feed upon roots of grasses, dock, and ragwort.
A glance at our figures will show that the males
differ markedly from the females in colour. That this
colouring serves a useful purpose is shown by Sharp,
whom we quote: " The male is an insect of exceptional
 PLATE XXVI 1

'-''0m-

rt d P.
cuu<

i_
 MOTHS 157

colour, being white above, in consequence of a dense

formation of imperfect scales the female ; is of tbe brown-
ish tints usual in Swift Moths. In the month of June
the male selects a spot where he is conspicuous, and
hovers persistently there for a period of about twenty
minutes in the twilight; his colour has a silvery- white,
glistening appearance, so that the insect is really con-
spicuous notwithstanding the advanced hour. Females
may be detected hovering in a somewhat similar manner,
but are not conspicuous like the male, their colour being
obscure; while so hovering they are ovipositing, drop-
ping the eggs amongst the grass. Females that have
not been fertilized move very differently,and dash
about in an erratic manner till they see a male; they
apparently have no better means of informing the
hovering male of their presence than by buzzing near,
or colUding with him. There can be little doubt
. . .

that the colour of the male attracts the female."

The male of H. hectus, according to the same authority,
gives off from his swollen hind-legs an odour of pine-
apple, which attracts the females.
There is very little authentic information concerning
the life-histories of species belonging to this family.
The larvse mostly live underground or in wood; the
pupae, which are very elongate, are active.
Drepanid^. —Hook Tips. Nearly all the species of
this family have outwardly directed, acute-angled tips
to their fore- wings. They are all moderate-sized insects.
In Britain we have half a dozen species, of which the
common Hook Tip, Drepana lacertinaria, is the most
frequently met with. Its larvae feed on birch and
heather, and are remarkable in possessing a long tubular
158 INSECT LIFE
process in place of the usual hind-claspers. The Pebble
Hook Tip, D. falcataria, but little less common; its
is

larvae dwell within shelters which they construct of

birch and alder leaves. Cilix glaiicata, when at rest,
closely resembles bird excrement.
—
LiMACODiD^. Small, stoutly built Moths, nearly
always of an apple-green colour, often edged with
brown. There are only two British species, of which
Afoda testudo is the commonest. As may be gathered
from the scientific name of this insect, the larva is a
footless, slug-like creature. Owing to their structure,
they glide rather than walk over the leaf-surface on which
they feed. This peculiar larval structure, combined with
the exceedingly ornate appearance of many species, makes
the family of great interest. The cocoons of Limacodids,
too, are interesting; they are provided with lids through
which the Moths may escape without difficulty.
—
Lasiocampid^. The species of this family are all
large insects, and are densely covered with scales;
antennse of males pectinate. These Moths are easily
recognized; they are, for the most part, heavy insects
and clumsy in flight. The commonest British species
is the Drinker, Odonestis potatoria, so named on account

when
of the curious dipping flight of the adults, which,
their course is over water, makes them appear to be
swooping down for a drink. The females are consider-
ably bigger than the males and a lighter colour. Differ-
ences in size between the sexes in this family are
common, the females of some more than
species being
three times the size of the males. Thebrown,
large,
hairy Drinker larvfe may be found feeding upon grass
in autumn and spring.
 PLATE XXIX

1. Papilio machaon (Swallow Tail) 5. Pieris napi (Green-veined White)

2. Aporia crateegi (Black-veined White) 6. Pieris daplidice (Bath White)
3 Pieris brassies LarRe Garden White) 7. Eiichloe cardamines Orange Tip)
4. Pieris raps 'Small Garden White) 8. Leucophasia sinapis (Wood White
9. Colias liyale (Pale Clouded Yellow)
See patie 14S.
 MOTHS 159

Almost as common is the Lacl^ey, Bomhyx neustria.

Its eggs and larvae, at any rate, are only too well known
to most fruit-growers. The former are deposited in
neat rings round the smaller twigs of some favoured
tree, probably an apple, and the larvae, which hatch in
the spring, are very destructive to the foliage. There
is another closely allied Moth, known as the Ground
Lackey, B. castrensis ; it is a somewhat local insect and
is not injurious, for its larvae feed on seaside plants.

The Oak Eggar, B. quercus, is one of our handsomest

Moths. The females, as is usual, are larger than the
males and paler in colour. There is, however, con-
siderable colour variation in this species; the oak- fed
larvae produce paler-coloured adults than those fed
upon heather. This Moth is supposed to take its
peculiar popular name from its close-spun cocoon,
which is not unlike egg-shell in appearance. The larval
hairs of this species are easily shed, and are particularly
irritating to the skin. The Fox, B. ruhi, is so called
on account of the colouring of the male; the females are
grey. As its name implies, it is a lover of bramble
in the larval state. The Lappet, Lasiocamfa querci-
folia : this handsome Moth is not common except in
the South. It is somewhat inert, but escapes attention
as it rests on some branch, because it very closely
resembles a dead leaf. Its larvae feed upon bramble
plum, sloe, amongst other plants. Of the December
Moth, Poecilocampa fofuli^ it is said that it sometimes
remains in the pupal state for several years.
Endromid^. —The British Moth popularly known as
the Kentish Glory, Endromis versicolor, is the sole
species of the family. It is by no means common, but
160 INSECT LIFE
may be taken by day in birch woods. The larvae are
almost destitute of hairs; they feed on birch, and super-
ficially resemble Sawfly larvae.
LYMANTRimiE. —This is a most interesting family of
sombre-coloured Moths, many of which have highly
injurious larvae. The Moths are mostly white, grey, or
brown, the first-named colour being the most frequently
met with. The larvae are hairy and often beautifully
coloured; the hairs of most species are irritating to the
skin. It is said of the larvae of the Nun, Psilura
monacha, and of the Gipsy Moth, Ocneria dispar, that
when newly hatched they have hairs provided with
air-bladders. These air-bladders are supposed to so
lighten their owners that, by launching themselves into
the air from a height, they are distributed for a con-
siderable distance by air-currents. Hair forms a con-
siderable portion of many Lymantriid cocoons, and,
more unusual still, the pupae of some species are hairy.
We have about a dozen species in Britain, and of
these the Vapourer, Orgyia antiqua, is very common

even in London. Although common, the Vapourer is

well worth a little attention. As our figure shows,
there is a striking difference between the sexes. The
male is strong on the wing and an active insect; the
un-moth-like female is a small, hairy, heavy-bodied
creature, with wings so minute as to be useless for
flight. She rarely strays far from her cocoon, and on
it she often lays her eggs. The larvae are among the
most beautiful of our native species, of a peculiar
bluish-grey colour with a paler strip down the back,
on which there are rows of red dots; they bear a couple
of tufts on their heads and four yellow tufts on their
PLATE XXX

5 = S
 PROPERTY OF
p, METCALF
\OTHS 161
backs, in addition to numerous smaller tufts. They
are catholic in their tastes, and there is little vegetation
that they will not devour. Occasionally, even in
London squares, the trees are completely defoliated
by these voracious larvse, and were it not for the activi-
ties of an Ichneumon parasite they would
speedily
an alarming extent.
increase to
The Gold Tail, Porthesia similis, is equally common,
though not a town-frequenting species. A glance at
our figure will show how appropriately this insect is
named. The larvae may be found on hawthorn and
various fruit-trees in the summer; they are prettily
marked with black and red.
The Black Arches, Psilura monacha, is also known
as the Nun. It is not common in Britain, but on the
Continent, and in Germany especially, it is a serious
forestry pest, for the young larvae feed upon the leaves
of many trees, but especially upon those of the
Coniferce.
The Pale Tussock, Dasychira pudibunda, also known
as the Hop Dog, because it does a considerable
amount of damage to hops, is a noted forestry pest
in France.
The most notorious Lymantriid, however, is the
Gipsy Moth, Ocneria dispar. Exactly fifty years ago
an American enthusiast who was studying various
Lepidoptera, with a view to making use of their silk,
accidentally released some imported Gipsy Moths. For
many years the insects merely held their own; then
they seemed to awaken to a new life; they increased
enormously, though they did not spread quickly.
Every effort was made, and is being made, to keep
them in check; a million dollars a year are spent on
21
162 INSECT LIFE
their control. Parasites and enemies have been im-
ported from Europe, but still the Gipsy Moth holds its

own as America's greatest forestry pest. Nearly as

injurious is the Brown-Tail Moth, Ewproctis chrysorrhcBa^
also imported from Europe. The adult is not very
dissimilar to the Gold Tail, but brown takes the place
of gold on the tip of the abdomen. A near relative of
the Pale Tussock, known as Dasychira rossii, is note-
worthy because it inhabits the Arctic regions.
Hypsid^. —A small family of tropical and sub-
tropical Moths, which do not resemble any European
species. Most of them are straw-coloured, with white
dots or lines.
Arctiid^. —This is a large family, and many of the
species are highly ornate.Everyone knows the " woolly
bears," those long-haired active larvae which may be
met with on all manner of vegetation in the early
summer, or may be seen walking rapidly over garden
paths or even roads. They are the larvae of the Garden
Tiger, Arctia caia. The long hairs of these larvae are
not without their uses; they serve as a protection for
their owners against many enemies, and they are used
to form the cocoon, for which purpose the owner bites
them from its body before pupating. The Cream-Spot
Tiger, A. villica, is a very similar insect to the Garden
Tiger in appearance, though easily distinguished. Much
more similar, however, are the larvae; those of the
former species may be known by their red heads, those
of the latter species are black. Both will eat almost
any vegetation.
The Ruby Tiger, S'pilosoma Juliginosa, is quite a
—
different-looking insect in fact, this genus bears some
 PLATE XXXI

wl^
%./^
w fo
3

WW
1. Lyceena bellargiis (Clifden Blue) 7. Nisoniades syrichthus malvae
2. Lyesena corydon (Chalk-hill Blue) (Grizzled Skipper)
3. Lycaena minima (Little Blue) 8.Nisoniades tagos (Dingy Skipper)
4. l.ycaena argiolus (Azure Blue) 9.Hesperia thaumas (Small Skipper)
5. Lyccena arion (Large Blue) 10. Hesperia actjeon (Lulworth Skipper)
6. Nemeobius lucina (Duke of Bur- 11. Hesperia sylvanus (Large Skipper)
gundy Fritillary) 12. Hesperia comma (Pearl Skipper)
Cseterocephalus palzemon (Checkered .Skipper)
 MOTHS 163
resemblance to certain species of Hypsidce. It is usually
met with on high ground, and heather is a favourite
food-plant of the larvae. The Buff and White Ermines,
S. lubricipeda and S. menthastri, are common every-
where. The Buff Tiger, Nemeo'phila russula, is a
daintily marked insect, a dweller on moorland. We
figure the male. Its larvae feed on heather and heath,
and hibernate through the winter. The Scarlet Tiger,
Callimorpha dominula, though a member of a different
subfamily, bears considerable resemblance to the Garden
Tiger. The Cinnabar Moth, Euchelia
jacohwcB, has a
livery which, in colour,strangely reminiscent of the
is

Burnet Moths, though there the similarity ends. Its

larvsD, black with conspicuous yellow bands, are common
on ragwort, and literally cover their food-plants, for
they are gregarious.
The little Muslin Moth, Nudaria mundana, is a frail
creature with feeble powers of flight. Its larvge feed
upon lichen, a favomite food of the species of this sub-
family. The "Footmen," of which we figure three
species, are all light-bodied,
somewhat narrow- winged
Moths. They by day, and their livery is usually
fly

some shade of yellow marked with black. The Common

Footman, Calligenia lurideola, is not easy to find in
its larval state, for the insects closely resemble their
food-plants in colour. Less common is the Eosy
Footman, Calligenia miniata, and quite local the Four-
Spotted Footman, Gnophria quadra, which, by the way,
is not spotted in the male; our figure is of a female.

The larvae of both species feed on lichens.

—
Geometrid^. This is an immense family, and,
curiously enough, the larvae are usually better known
164 INSECT LIFE
than the adults. The former are known as Loopers or
Geometers on account of their curious looping gait,
necessitated by their anatomical structure. They
possess thoracic legs, a pair of claspers, and but one
other pair of abdominal legs, on the ninth segment.
When walking, they clasp their support with the
thoracic legs and draw up their abdominal legs so that
their bodies are looped; then, after making firm with
their hind-legs, they advance the fore-part of the body
and repeat the operation. When at rest these larvae
assume curious attitudes. Being thin and hairless and,
some of them, coloured like a dry twig, they frequently
clasp their support with their hind-legs and rest at
an angle of about 75 degrees thereto. When in this
position there is always a life-line of silk from the
larva to some near-by twig. This silken thread serves
a double purpose: it lends additional support to the
larva, and when danger threatens the insect can drop
from the tree and remain suspended by its thread till
the danger be past. After an interval the larva returns
to its original support by means of the thread. Many
Loopers, when at rest, bear a remarkably close resem-
blance to twigs, green or dry, according to their colour.
The adults are all night fliers; they are somewhat
delicate insects, but nearly all of them are provided
with relatively large wings, with the exception of the
females of certain species, which are wingless or nearly
so. The family includes the numerous Moths known to
entomologists as " Pugs,'* " Carpets,'' and " Waves,"
etc. Many species are decidedly injurious to crops and
forest trees.
Lack of space forbids even a cursory view of the
 PLATE XXXII

ACTIAS SELENE
 MOTHS 165
fifty-seven species we figure in colour, and these are
but a fifth of the British species.
The Early Thorn, PericalUa bilunaria, is interesting
because it belongs to a genus whose larvae, when resting,

resemble thorns or small branches. They should be

sought on hawthorn and oak in the summer. The
Pale Brindle Beauty, Phigalia pedaria, is a species with
wingless females. The females of this order are much
more active than are those of the Vapourer Moth.
Many of them ascend the highest trees, and it has even
been asserted that the males carry them thence. Oak
and beech are the favourite trees of the female and
their larvae.
The Magpie Moth, Abraxas grossulariata is often a ,

serious pest of gooseberries and currants, and on that

account is sometimes called the Gooseberry and Currant
Moth.
The most notorious pests of the family are the Mottled
Umber, Hyhernia defoUaria, and the Winter Moth,
Cheimatohia hrumata. Both of them are well named;
defoUaria speaks eloquently of the Mottled Umber's
defoliating propensities, and the Winter Moths are on
the wing in November and December. The females of
the former species are wingless; those of the latter have
wings only slightly developed. This lack of wings does
not appear to affect the geographical distribution of the
Winter Moth, for it is found almost everywhere in
Europe and in North America.
NocTuiD^.— Another unwieldy family of Moths, con-
taining a large number of species which are very similar
to one another. Often, in such cases, the larvae are
quite distinct, a statement which may be verified by
 166 INSECT LIFE
an examination of the larvae and pupse of Acronyda fsi
and A. tridens. The larvae of some of the Dart Moths
(Agrotis spp.), on the other hand, are so much alike
that it is impossible to identify them with certainty,
though the Moths themselves are quite distinct.
As may be surmised from the name of the family,
nearly all these Moths are night-fliers; the larvas, too,

of many species remain hidden by day and come out

at night to feed.
We no less than sixty-five Noctuids, but a
figure
tithe of which we can mention here.
The Antler Moth, Charceas graminis, is an exception
to the usual Noctuid rule, in that it often flies by day.
It is exceedingly common and very prolific, and, seeing
that its larvae feed upon grasses, it is not surprising to
learn that in certain seasons it becomes a serious pest.
Very frequently we read of plagues of Caterpillars
which devour all the herbage of our pastures; usually
the culprits are the larvae of the Antler Moth.
The Cabbage Moth, Mamestra brassicce^ is another
serious pest, though, fortunately, it is not so prolific

as the last-named species. Its larvae refuse little that

is green, but appear especially partial to cruciferous
plants, cultivated for choice.
The genus Agrotis is noted for its evil-doers, and every
husbandman knows the Turnip Moth, A. segetum, and
the quaintly named Heart and Dart, A. exclamationis.
The larval attacks of these species are exceedingly
insidious, for they are subterranean feeders upon roots
of grasses, cruciferous plants, and the like. Very
frequently the total failure of the crop is the first indica-
tion to the farmer that anything is amiss, for the larvae
PLATE XXXIII
 MOTHS 167

rarely show themselves. A near relative, the Australian

Bugong Moth, A. S'pina, was formerly used as an article
of food by the natives.
Very interesting are the Plusias ; they are frequently
devoid of the usual complement of larval legs, and on
that account they progress in a manner very remin-
iscent of the Geometers. This trait has earned them
the name of Semi-Loopers. Many of the Moths have
wings, beautifully marked with metallic gold or silver
spots and blotches. The Gold Spot, Plusia festucce,
affords but a hint of the lovely ornamentation to be
found in some exotic species.
The Orange Under wing, Brofhos parthe^iias, is a
diurnal Moth, and is on the wing in early spring. Its
near relative, B. notha, has the peculiar habit for a
Noctuid of spinning two or three leaves of its food-
plant (aspen) together and living within the shelter.
When fully fed, it seeks some soft wood, into which it

bores, there to pupate. Before doing so, however, it

takes the precaution to close the hole by which it has

entered with a double door of silk.

In a family containing so many injurious species, it

is pleasant to mention one which is useful. The South

European Noctuid, Erastria scitula, as a larva preys
upon the Peach Scale, Lecanium olece. The larvae are
small, the scales are large. The former eagerly devour
the latter, and eventually add to the scale by means
of silk, so that it forms a shelter beneath which they
can pupate.
The story of the Noctuids could be unfolded to con-
siderable length; from the giant American Erebides,
which may span asmuch as eight inches from tip to
168 INSECT LIFE
tip of their wings, to the most minute forms, all are
interesting and many extreme beauty. We must,
of
however, leave the family with the remark that the
larvae of the Marbled Beauty, Bryofhila perla, share
with certain of the Arctiids the very uncommon habit
of feeding upon lichens, and, as is usual in such cases,
their colouring closely resembles that of their food-
plants.
Pykalid^. —An enormous family of small or medium-
sized, long-legged, somewhat fragile Moths. In Britain
about a hundred and known; many of
fifty species are
them are injurious, and some are among the most
interesting of all the Lepidoptera.
The Scoparias, of which we Hoary Grey,
figure the
Scoparia dubitalis, are, like the species we mentioned
above, lichen-feeders. The Ephestias, and notably the
Flour Moth, E'phestia Kuhniella, are many of them
which they not only eat,
serious pests of stored grain,
but damage by matting together with their silken webs.
A species of E'phestia also attacks dried figs, and its

larvae are by no means strangers to our dinner-tables.

The Meal Moth, Pyralis farinalis, is very similar in
habit to the Flour Moth.
The Grass Moths of the genus Cramhus are very
common. They may be seen in thousands during a
walk through meadowland in summer little pale- —
coloured Moths, which only seem capable of flying a
short distance without resting. Their pointed heads,
owing to the shape of their palpi, and their method of
resting with wings tightly folded over their backs,
render them unmistakable.
Of the British Pyralids, the most remarkable are the
 PLATE XXXIV

1 Ai-herontia airopu 4 Ueilephila eiiphorbiie 7. Chaerocampa elpenor

2 Splimxconvolvul^ .')
Deilepliila galii 3. Smeriiithus ocellatus
3 Sphinx liBii>.tri (J CliEErocampa porcellus 9. Smerinthus populi
See i/at/e 151
 MOTHS 169
China Marks Moth— we figure one species, Hydrocam'pa
stagnata. Their larvae are aquatic, and not only so
their life-histories are of absorbing interest. For a
very full and interesting account of the life-history of
the Brown China Marks Moth, H. nympheata, the
reader is referred to Miall's **
Natural History of Aquatic
Insects/' In brief, the Moths deposit their eggs upon
the leaves of some aquatic plant. When the larvae
emerge they tunnel into the leaves and appear oblivious
of the water which surrounds them. After a moult
the larvae forsake their burrows and make dwellings by
cutting out pieces of leaf and fastening them to the
under-sides of other leaves. These shelters are not
waterproof, but the water causes the larvae little incon-
venience. More moults occur, and hibernation takes
place below water. In the spring the larvae each take
a couple of pieces of leaf and fasten them together in
the shape of a double convex lens. At this stage the
water seems to trouble them for the first time, and they
contrive to make their lens-shaped shelters watertight.
In them they complete their development.
Despite their aquatic environment, these larvae are
not provided with gills or any organs for respiration
below water; they apparently breathe through their
skins. In certain closely related, though not British
species the larvae are provided with branchial gills.*
The larvae of the Small China Marks Moth, Cataclysta
lemnata, live in little cases which they form by binding
together the leaves of duckweed with silk.
Of all the Pyralids, the most extraordinary is the
genus Acentropus. " This insect is apparently the most
completely aquatic of all the Lepidoptera, and was for
22
170 INSECT LIFE
long associated with tlie Trichoftera in consequence of its
habits and of the scaling of the wings being of a very-
inferior kind. The males may sometimes be found in
large numbers fluttering over the surface of shallow,
but large, bodies of water; the females are rarely seen,
and in some cases have no wings, or have these organs
so small as to be useless. The female, it would appear,
comes quite to the surface for coupling, and then takes
the male beneath the water. The larvae have the
usual number of Lepidopterous feet, and apparently
feed on the leaves of plants below water, just as Lepi-
dopterous larvae ordinarily do in the air. They have
no trace of gills, and their mode of respiration is un-
known."'
Species of the genus Galleria —there are three in
Britain —are much dreaded by bee-keepers. These
Moths enter the hives at night and deposit their eggs
near the combs. The larvae greedily devour the wax,
and at the same time spin tough silken webs wherever
they go.
Pterophorid^. —The Plume Moths are easily dis-
tinguished on account of their deeply divided wings,
the hind-wings especially —the fore-wings are some-
times nearly entire, and in one genus, Agdistes, the
wings are quite undivided. These are delicate little

Moths, many of them white, and their chief interest lies

in their coloured, soft, and hairy pupae. There are

thirty species of these little Moths in Britain.
—
ToRTRiciD^. Minute Moths whose larvae all live
inside their food, which may consist of either fruits,
seeds, roots, or leaves. When leaves are the food, the
larvae roll them most ingeniously and fasten them with
 PLATE XXX\-

1. Chserocampa alecta 2. Deilephila vespertillio 3. Smerinthiis tilli

4. Chserocampa nerii
5. Deilephila lineata 6. Deilephila dahlii 7. Sphinx pinastri
 MOTHS 171

silk in such a manner that they will remain in a per-

manently rolled state. As the larvae are all very small

and the leaves are often large, the exact methods by
which they accomphsh their object have been the cause
of considerable conjecture. Of the " leaf-rollers/' the
commonest, in Britain, are the Green Tortrix, T. viri-
dana, a not inconsiderable pest of oak, and T. ribeana.
The most serious pest of the family is the Codling
Moth, Carpocafsa fomonella. The female lays her eggs
on young leaves of apple, about May, and the larvae,
when they hatch, bore into the young fruit at the calyx
end and penetrate to the core. Here they live and
feed and collect a nauseating mass of frass which ruins
the fruit. When fully fed, the larvae tunnel their way
out of the fruit and pupate beneath the loose bark of
the apple-tree. The closely related C. splendam infests
acorns, and 0. Juliana Spanish chestnuts.
The most curious of these Tortricidce are those whose
larvae live in the seeds of Euphorbias and give rise to
the so-called " jumping beans." Carfocapsa saltitans^
for instance, lives in the seeds of Croton coUiguaja. It
hollows out most of the interior, from one end to the
other, and by various movements, which have not yet
been observed, it causes the centre of gravity to shift
from time to time and the seed to move.
— —
TiNEiD^. A very large family there are seven
hundred British species— of minute Moths. Their hind-
wings, which are small, are usually fringed.
Perhaps the most remarkable fact about the majority
of species of this family is the nature of their food.
The larva of the Clothes Moth, Tinea tapetzella, feeds
upon clothes and builds cases of its food-material in
172 INSECT LIFE
which to dwell. The larvae of the Woollen Moth,
T. pellionella, have similar habits, whilst those of
T. hiselliella appreciate the same food, but do not make
cases. Of the exotic species, T. vastella feeds on the
horns of living antelopes, and another species ** has
been found in abundance in the hair of a live Sloth,
Brady pus cuculliger, under circumstances that render
it possible that the larva feeds on the creature's hair,

though it may feed on minute vegetable matter found

in the hair.''
Many of the Tineids are " leaf- miners.'' The larvae,
quite early in life, burrow between the upper and lower
epidermis of the leaf of their food-plant. There they
feed on the leaf- tissues, secure from most enemies, and
there also they pupate. The common Oak-Miner,
Nepticula ruficapitella, is frequently seen, or rather the
workings of its larvae.

The Small Ermine, Hyponomeuta padella, a beautiful

little white Moth with black markings on the fore-
wings, is better known by the activities of its larvae
than by the appearance of the adults. Its gregarious
larvae are known as " tent-caterpillars " from their habit
of spinning dense silken webs on the branches of their
—
food-plants apple and hawthorn. Within these tents
they dwell when young, and to their shelter they retire
when alarmed in later life.
 PLATE XXXVI

1. Cossus ligniperda Ocneria dispar

2. Zeuzera pyrina
7. 12. Bombyx castrensis
8. Psihira monacha 13. Bombyx neustria
3. Bombyx riibi
9 Dasychira pudibunda
Bombyx 14. Lasiocampa querifolia
4. quercus 10. Orgyia antiqua
5. Odonestispotatoria
15. Endromis versicolor
11. Orgyia antiqua (female) 16. Saturnia pavonia (male)
6. Porthesia similis
See page 152.
 BEETLES 173

CHAPTER VI

COLEOPTERA AND STREPSIPTERA

Okder Coleoptera, or Beetles.
Beetles are four-winged insects; their fore-wings
hard and horny, and serve as shields
(elytra) are usually
for the membranous hind- wings. In almost every case
the hind edges of the fore-wings are placed together
when not expanded, so as to form a suture down the
insect's back. Mouth-parts designed for biting; meta-
morphosis complete.
Although there can be few readers of these pages
who do not possess a general idea of Beetle anatomy,
as far as externals are concerned, at the same time,
mainly on account of their mode of life. Beetles are
not nearly such famihar creatures as FHes or Moths.
For the most part, they are ground dwellers, and the
Coleopterist must needs know something of their habits
to be able to come upon them. They form, in fact, by
far the largest order of insects; about seventy thousand
species are known, and of these more than four thousand
are native to this country.
Coleoptera may be found of every conceivable form;
some of the most bizarre insects belong to this order.
In colour they vie with the Butterflies and Moths, some
of the Lamiidce being brilliantly attired; certain of the
Weevils are of exquisite metallic hue, veritable gems
174 INSECT LIFE
of the insect world; the Eose Beetles, the Ladybirds,
the Leaf Beetles, and many others, cannot fail to arouse
our admiration in the adornment of their armour. On
the other hand, the species of several families are nearly
all any rate of sombre shades; the Tene-
black, or at
hrionidceand the Bostrychidce are of this nature. Some
Beetles have elytra so smooth that they have the appear-
ance of being polished daily; others have pits, more or

Fig. 7 External Anatomy of a Beetle. (Upper Side.)

1, Head stretched forward; 2, prothorax; 3, mesothorax, scutellum;
4, metathorax; 5, abdomen; 6, anterior wing (elytron) of right side,
turned forward; 7, posterior wing of right side, expanded; 8, maxillary
palps; 9, femur of third right leg; 10, tibia of third right leg; 11, tarsus
of third right leg.

From " Zoology of the Invertehrata" by A. E. Shipley.

less deep all over their surface or arranged in longi-

tudinal rows, or in some other definite pattern. Other
species have furrowed or crinkled or hairy elytra;
indeed, it is hard to set a limit on the various forms
which this vast order exhibits. In size there is every
stage between the tiny SfhceridcB, of which S. acaroides
occurs in Norfolk, no longer than one-fiftieth of an inch,
or Nanosella fungi, but half that size, up to the giant
 PLATE XXXVII

.> . /

S
W
^^
1. Plusia chrysilis 2. Halias prasinana
3. Zygsena exulans i. Bombyx qiiercus (Female) 5. Zygffina lavandulae
6. Eurraiithis plumistaria 7. Odonestis potatoria {Female) 8. Callimorpha Hera
9. Hylophila bichlorana 10. Ocneria dispar 'Female) 11. Utethesia pulchella
 BEETLES 175

Goliath Beetles or the South American Prionids, Titanus

giganteus, which may measure between two and three
g ab p
inches in length.
The habits of Beetles
are as varied as their
forms. There are
species which are per-
fectly adapted to an
aquatic life in the adult

Fig. 8 —External Anatomy of a

Beetle. (Under Side.)

A, Ligula; B, paraglossus; C, labial palp;

D, maxillus, or lower jaw; E, labrum,
or upper lip; G, mandible, or jaw; H,
antennae; I, mentum, or chin; K, buccal
Fig. 9. Head and Mouth
fissure; L, gula; M, prosternum; N,
Parts of a Beetle.
prosternal episternum; O, prosternal
epimeron; P, coxae; Q, mesosternum; R, A, Mandibles; B, labial
mesosternal episternum; S, mesosternal paljii; C, maxillary palpi;
epimeron; T, metasternal episternum; D, antennae; E, labrum.
U, metasternum; V, metasternal epi- 1, Lacinia; 2, galea, or
meron; W, trochanters; XI to XG, seg- palpiform lobe; 3, palpi;

ments of abdomen; Y, femur; Z, tibia. 4, stipes.

From "Common British Beetles,'' by From " Common British

C. A. Hall. BeeUes," by C. A. Hall.

stage; others dwell in decaying animal or vegetable

matter; others are purely leaf-eaters; others, again, are
carnivorous. The mode of life of the larvss has not
176 INSECT LIFE
been so thorouglily studied in this order as in, say, the
Lefidoftem ; sufficient is known, however, to render it
quite impossible to sketch one larval history which will
apply to all. The most curious larvae, in point of view of
their behaviour, are those
of the Oil or Blister Beetles
{Meloidce) but as they are
;

fuUy described elsewhere

(p. 21), the point need not
be laboured here.
It is natural that so
immense an order as the
Coleoftera should be con-
siderably subdivided; it

is unfortunate that there

Fig. 10. Types of ANXENNiB.

should exist so much differ-
1, Moniliform (beaded); 2, filiform ence of opinion concern-
(threaded); 3, serrate (saw-like); ing its correct subdivision.
4, pectinate (comb-like); 5, capi-
tate (with ahead); 6 and 7, clavate
We have elected to follow
(clubbed); 8, perfoliate clavate; 9, Sharp, who recognizes six
lamellate (plated); 10, geniculate
series.
(elbowed).

From " Common British

Series 1. Lamelli-
by
C. A. Hall.
Beetles,^''
CORNIA. — The terminal
joints of the antennae are
leaf-like, or at least broader than the rest, and when
at rest and not expanded appear as a club. Tarsi
five-jointed.
Series 2. Adephaga. —Antennae with their terminal
joints never Well-developed mouth-parts.
leaf-like.
Six or more ventral abdominal segments visible. Tarsi
five-jointed, with the fourth joint quite distinct.
Series 3. —
Polymorph a. Antennae with the terminal
 PLATE XXXVIII

A STAG BEETLE {CLADOGNATH US GIRAFFA), MALE

 BEETLES 177

joints clubbed or, from the third joint, saw-like, on the

inner face. Other characters very variable.
Series 4. Heteromera.—Hind tarsi four-jointed,
other tarsi five-jointed.
Series 5. —
Phytophaga. Fifth tarsal joint usually
so small that the members of this series appear to have
four- jointed tarsi. Lower surface of the feet may be
pubescent, bristly, or naked.
Series 6. Khynchophora. —Head prolonged into a
beak. Tarsi five-jointed, but, owing to the small size
of the fifth joint, apparently four-jointed.
By some authorities the series Polymorflia is not
recognized, and, instead, there is a series Glavicornia,
with clubbed antennae, and a series Serricornia, with
serrate antennae.
In the six series of the Coleoptera there are recognized
more than eighty families. To deal with such an
unwieldy horde in these pages is an impossibility. We
have elected to survey sixty of the families, either
because they are well represented in Britain or because
they contain remarkable exotic species.

Series 1. Lamellicornia.

It is a remarkable fact that, so far as is known, the

larvae of all the seven families comprising this series
are very similar in habit. They are all six-legged
creatures with their bodies curved into the shape of
the letter C, and swollen at the hinder end. They live
underground or in rotten wood, feeding upon their
surroundings, or upon living roots, or upon excrement.
Passalid^. —Large dark brown or black Beetles, with
parallel-sided elytra, for the most part deeply furrowed.
23
 178 INSECT LIFE
These Beetles are mainly tropical and aU live in
decayed wood; none are Britisli. They are only men-
tioned here because of the remarkable fact that, though
the adults are incapable of producing a sound, the hind
pair of legs in the larvse are in the form of modified
hands, the fingers of which scrape on an adjacent file-

like surface and produce a distinctly audible note.

Exactly why the larvae should possess these sound-
producing organs it is hard to say.
LucANiDiE. —^Mandibles of the males highly developed
and often enormous size. Ten- jointed antennae,
of
usually elbowed and terminated by a comb-like club.
The elytra entirely cover the upper surface of the
abdomen.
The Stag Beetles are noteworthy on account of the
remarkable development of the mandibles in the males
in some species the mandibles equal the body of the
insect in length. It has been stated that this mandi-
bular growth is of little or no use to the insects; be
that as it may, a couple of male Stag Beetles, when in
the mood, will use every effort to damage one another
with these weapons, and their manoemTes on such
occasions are highly entertaining.
There are three common species of Stag Beetle in
Britain: the Small Stag Beetle, Dorcus 'parallelopipedus
a dull black insect without the excessive mandibular
development of the Stag Beetle Lucanus cervus. Its
elm and beech, whilst those of
larvae live in decaying
the Stag Beetle are partial to decaying oak. The
larvae of the latter Beetle —our largest British insect,
by the way — are very similar to those of the common
Cockchafer. They do not become fully fed till the
 PLATE XXXrX

-v^^
fc-^
f'

1. Dicranura vimila 9. Acronycta riimicis 17. Phalera bncephala

2. I.ophopteryx camelinj 10. ISIoma Orion 18. Hydraecia micacea
3. Thyatira derasa 11. Notodonta dromedarius I'J. Leucania impura
4. Drepana falcataria 12. Leucania conigera 20. Phalera curtula
5. Drepana lacertinaria 13. Acronycta psi 21. Tapinostola fulva
6. Asphalia flavicornis \i. Notodonta ziczac 22. Bryophila perla
7. Thyatira batis 15. Hydraecia nictitans 23. Gortyna ochracea
8. Notodonta dictsea 16. Diloba ceeruleocepliala 24. Xylophasia rurea
See page 133.
 BEETLES 179

fourth year, and even then, after pupation, the adults

often remain in hiding for some months. Like the
larvae of Passalidce, those of the Stag Beetle are capable
of producing sound. The smallest native Stag Beetle,
Sinodendron cylindricum, should not be placed in the
family according to some authorities; in place of the
usual over-developed mandibles, the males of this species
possess a single horn on the head.
CoPRiD^. — Terminal joints of the antennae capable
of wide separation and well coadapted. Pygidium
usually exposed; six (usually) visible ventral abdominal
segments. Abdominal segments placed in a line, and
entirely coveredby the elytra.
The Dung Beetles comprise an enormous family.
Unfortunately, we do not possess in this country any
of the Scarab Beetles, sacred to the ancient Egyptians
and immortalized by Fabre. The French entomologist's
description of the life and habits of the sacred Beetle,
ScarahcBus sacer, is so admirably conceived and so
charmingly narrated that it should be read by every
insect lover.
In Britain the commonest Dung Beetles are the little

Onthofhagus fracticornis, a dull yellow Beetle, whose

head and thorax are of a greenish metallic sheen; the
small Dung Beetle, Aphodius fimetarius with red elytra ,

and a shining black thorax; the much larger, shining

black Aphodius fossor ; the black red-legged Aphodius
niflpes ; and Copris lunaris, a near relative of the Scarab.
Of all the species in this family, the most familiar is
the "Dor," " Dumble-door," or "Clock'' Beetle,
Geotrupes stercoranus . This is one of the few Beetles
that habitually takes to flight; its heavy, noisy efforts
180 INSECT LIFE
in aviation are a familiar sight on calm summer even-
ings; its defunct, mite-ridden carcass is by no means
rarely observed. The closely related Geotrupes spiniger
possesses an unpunctured ventral plate, which is absent
from the " Dor "' Beetle, whilst the equally common
Geotrwpes sylvaticus has much less deeply gi'ooved and
more metallic blue-coloured elyta.
Beetles of the genus Geotrwpes can emit sounds by
rubbing a rough surface on the hind-coxae against a
ridge on the under-surface of the abdomen, whilst those
of the genus Trox do so by rubbing a pair of ridges,
situate on the upper surface of the last abdominal
segment but one, against a pair of somewhat similar
structures which occur on the inner face of the elytra.
Melolonthid^. — Characters similar to those of the
CopridcB, but the abdominal spiracles are not all in one
line and the terminal spiracle is not usually covered
by the elytra.
By most frequently encountered of the Cock-
far the
chafers, not only in Britain, but on the Continent, is
the so-called Common Cockchafer, Melohntha vulgaris.
It is injurious both in the adult and larval stages, and
in certain districts of France and Germany the adults
appear, in some years, in such enormous numbers as to
defoliate all the trees on a wide area. The chestnut-
coloured Cockchafer is so distinct from all our other
native Beetles that it may be identified by means of
our illustration. The female deposits her eggs below
the surface of the ground, and the larval life extends
over from three to five years, according to the climate.
During this period feeding takes place without inter-
ruption, except when hard frost drives the insects deep
 PLATE XL

^%#

1. Macroglossa stellatariini 9. Calligenia lurideola 17. Arctia caia

2. Macroglossa fuciformis 10. Gnophria quadra IH. Spilo^oma lubricipeda
3. Trochiliiim crabroniformis 11. Kuclielia jacolxea I'J. Spilosoma menthabtri
4. ZyRcena filipenduljE 12. Callimorpha dominula 20 Hepialiis hiimuli
5. Sesia tipuliformis Vi. Arctia villica 21. Hepialus luimuli (female)
6. Inoglobularia li Spilo>oma tuliginosa 22. Hepialus velleda
7 Xiidaria mundana 15. Nemeophila riissula 23. Hepialus hectus
8. Calligenia miniata 16. Nemeophila plantaginis
See pai/e 102.
 BEETLES 181

into the soil. Eoots of herbage and trees form the

staple food of the Cockchafer larvae. Rhizotrogus
solsiitialis is more local, but equally common in some
districts. Serica hrunnea is a much more uncommon
Beetle than its near relative, whilst our single repre-
sentative of the genus HopUa, H. fhilanthus^ is rare in
most localities.
EuTELiD^. — As MelolonthidcB, but the abdominal
spiracles are in two lines. Tarsal claws unequal.
Little is known concerning the life-histories of the
Rutelidce. The British June Bug, Phyllopertha horticola,
is very similar in habit to the Common Cockchafer, and
like that insect is an annoying garden and farm pest.
Anomala friscJm is rather less common. The members
of this family are remarkable for their wide colour
variations, and afford a striking lesson to the budding
systematist that but little reliance can be placed on
colour as a characteristic.
Dynastid^. —As Rutelidw, but tarsal claws equal and
front coxae transverse and hardly prominent; head and
thorax nearly always more or less horned, especially in

the males.
This, the smallest, family of the Lamellicorns contains
some of the largest individuals —in fact, there are no
Beetles of greater bulk than some of the typical Dynas-
tids. no British representatives of the
There are
family. The most remarkable feature of these Beetles
is the curious and often unwieldy outgrowths which

occur on their heads and prothoraces, especially those

of the males. All the Dynastid larvae feed upon
wood, after the manner of Longicorn and Lucanid
larvae
182 INSECT LIFE
The Rhinoceros Beetle, Oryctes rhinoceros, is a for-
midable and striking-looking insect, black in colour and
about two inches in length. From his head grows a
long upwardly curved horn, and from the front of his
thorax a double-pronged projection. The smaller brown
South European 0. nasecornis has very similar head
adornments. The giant of the family is Dynastes
hercules, a West Indian species with enormous head
and thoracic appendages. The length of a well-grown
male often exceeds six inches.
—
Cetoniid^. As Bynastidce, but the front coxae are
more prominent and shorter transversely; head broad
and flattened; ten- jointed antennae with a compact
three- jointed club.
The most beautiful Lamellicorns are to be found in
this family. Even the Common British Rose Chafer,
Cetonia aurata, rivals many tropical Beetles in the
brilliance of its elytra. It is very destructive to roses.
Gnorimus common native species, and
nohilis is a less
still less met with is the black, white-spotted
frequently
Oorythyrea stictica. The Rose Chafers are sun-lovers;
in sunshine they readily take to flight by raising the
tips of their elytra and so allowing the wings to be
spread; they never separate their elytra in the usual
manner. In the genus Trichius this peculiarity is not
exhibited. These are pubescent Beetles, and one native
species T.fasciatus, a black insect with orange markings
on its elytra, frequents thistles.
One most beautiful Cetoniids, if comparison
of the
can be made among such resplendent insects, is the
very common West African Cetonia marginata, a velvety-
black creature margined with orange. From the same
 PLATE XLl

1¥
7
^^ 9 ^J^

30 31 ^ 32 33

Uropteryx sambucaria Amphidasys strataria Bupalus piniaria

Rumia luteolata Acidalia bisetata Hybernia margrinaria
AnHCroiia prunaria Cheimatobia brumata Hybernia marginaria
Pericallia bilmiana Cheimatobia brumata (female)
Metrot-ampa marRaritaria (female) Eupithecia venosata
Crocallis elinguaria Abraxas grossulariata Oparobia dilutata
7. Pliigalia pedaria Geometra papilionaria Ematurga atomaria
7a Phigalia pedaria (female) Cabera piisaria Eupithecia oblongata
8. Larentia cjesiata Acidalia ornata Hybernia defoliaria
9 Kmmelesia albiilata Cleora lichenaria Eupithecia satyrata
10 Larentia didj-mata Halia vauaria Acidalia aversata
11 Zanosoma punctaria Larentia viridaria Boarmia gemmaria
12. Amphidasi'S betularia Teplirosia biundularia
See ixiiie ItiS.
 BEETLES 183

country hail the GoHath Beetles, which often measure

as much as four inches in length. Their heads are
armed with horns.

Series 2. Adephaga.

The families comprising this series form a very

natural group. The species are all carnivorous; on that
account the series is sometimes known as Carnivora, a
title which is obviously misleading.
—
CiciNDELiD^. Eleven- jointed, filiform antennae aris-
ing above the base of the mandibles; tarsi five-jointed;
legs long and usually very slender eyes prominent.
;

The Tiger Beetles are among the most active of the

Coleoptera ; some of them are powerful fliers, all are
swift of foot. Bates, describing a South American
species, said: " Their powers of running exceed anything
I have ever observed in this style of insect locomotion;
they run in a serpentine course over the smooth sand,
and when closely pursued by the hand they are apt to
turn suddenly back and thus baffle the most practised
hand and eye.'' All the species are predaceous both
in the larval and adult stages.
Most of the Tiger Beetles are resplendent in mail of
metallic sheen, greens and blues predominating. Four
species occur in Britain, and our green Tiger Beetle,
Cicindela camfestris can hold its own mth its tropical
relatives as far as colour is concerned. The Wood
Tiger Beetle Cicindela sylvatica is of more sombre hue.
So far as is known, the larval habits of all the species
in this family are similar. The female Beetles deposit
their eggs in the ground. The larvae, when they emerge,
excavate deep vertical burrows and station themselves
184 INSECT LIFE
so that their hard, horny heads cover the mouth of their
subterranean home. In this position they remain
motionless till some passing insect comes within reach
of their powerful jaws; then the victim is seized and
devoured. All the known larvae are well adapted for
this mode of life. Their eyes are keen-sighted; their
relativelyenormous heads serve as excellent stoppers to
their burrows; their slender, distorted bodies are armed
with a pair of formidable hooks on the back of the fifth
segment; by the aid of these hooks and the hind end
of their bodies they can easily remain at the mouth of
the burrow awaiting passing prey. Tiger Beetles are
certainly useful in keeping down the numbers of harmful
insects.
Carabid^. — Antennae filiform, terminal joints pubes-
cent, arising from behind the base of the mandibles;
and slender.
tarsi five-jointed; legs long
The Ground Beetles form one of the largest families
of Coleoptera, about thirteen thousand species having
been described. They rival the Tiger Beetles in activity
and voraciousness, though the majority of British
species do not take to flight readily. Nearly all species
are carnivorous both in the larval and adult stages; but,
unlike the Tiger Beetles, the larvae are active and fleet
of foot.
Amongst the Ground Beetles with vegetarian tastes
there are several species in Britain. Ldbrus gibhus is

a grain-eater, and its larvae devour roots. Amarafulva

and^. aulica are common. Most species of the genus
Har'palus are not wholly carnivorous, and H. ruficornis^
H. ceneus, and H. latus may be met with in most gardens,
probably near the strawberry-beds, for they are partial
 PLATE XLII

THE LONG-HANDED BEETLE (EUCHIRUS LONG/MANUS), MALE

 PLA.TE XLIII

HERCULES BEETLE {DVIVASTF.S NERCULES), MALE

PLATE XLIV
 PLATE XLV

OOLIATH BEETLE {GOLIATHUS DRURVl), MALE

 PLATE XLVI

GOLIATH BEETLE {GOLIATHUS GIGANTEUS), MALE

 PLATE XLVII

GOLIATH BEETLE {GOLIATH US CACICUS), MALE

 PLATE XLVIII

GIANT TIGER BEETLE {MANTICHORA HERCULEANA)

 PLATE XLIX

FIDDLE BEETLE (MORMOLYCE PHVLLODES)

 BEETLES 185

many species of the genus

to the ripe fruit, as also are
Pterostichus, ofwhich we figure P, cwpreus, P. madidus^
P. picimanus^ and the wingless P. striola. A volume
of considerable dimensions could be filled with descrip-
tions of the wonderful forms and varied habits of
Ground Beetles. The most ciu'ious members of the
family are, perhaps, the British species of A'^pus,
A. marinus and A. rohinii, dwellers by the sea, which
spend part, at least, of each day below water, yet they
are not aquatic Beetles. The European and American
cave-dwelling species of Anophthalmus are remarkable
in that they are blind. One would imagine this a
handicap to a free-roving predaceous Beetle, but so
well are these insects furnished with tactile bristles that
the loss of sight causes them little inconvenience.
Maybe, like the Ants, they possess a sense of which we
are not conscious. Other Carabids haunt the nests of
Termites, and one species, Glyptus sculftilis^ according
to Horn, very closely mimics the queen of Termes
hellicosus. One of the most beautiful Carabids is the
golden-green Calosoma sycophanta. It is very rare in
Britain, but common on the Continent. It haunts oak-
trees and feeds upon the larvse of the Processionary
Moth. It was introduced into America to control the
Gipsy Moth.
The most striking British species undoubtedly belong
to the genus Carahus ; the Violet Ground Beetle, Carabus
violaceus, is a beautiful insect and one of our largest
Beetles. Other species are the copper-coloured C.
arvensis, the purple C. nemoralis^ and the nearly black
C. catenulatus.
A Ground Beetle which always claims attention is the
24
186 INSECT LIFE
curious little Bombardier Beetle, BracJiinus crepitans
Witli many Carabids it is a common habit to eject a
caustic liquid as a protection against enemies. The
Bombardier Beetle performs this feat so rapidly when
alarmed, and the ejected fluid is so volatile, that a
slight explosion ensues; hence the popular name of the
Beetle. The ejection of an evil-smelling acid or alkaline
fluid is a well-known protective device in the Animal
Kingdom, from the notorious skunk downwards.
There is no more puzzhng family for the entomological
student than the Carabidce. We have figured a large
number of British species, but, however well executed,
no Ground Beetles.
figures will serve to identify the
With accurate and even authentic named
descriptions
specimens before one, it is by no means easy to be sure
of one's ground when attempting to identify some
species of Ground Beetles.
PELOBiiDiE. —Antennae not pubescent; hind-legs
swimming; tarsi longer than tibiae.
slender, adapted for
This small and unimportant family consists of but
one genus and foiu* species, of which one, Pelohius
tardus, is British. Its chief claim to our notice lies in
the peculiar adaptation of the larvae to a purely aquatic
hfe, and the remarkably loud note which the adults are
able to sound.
Dytiscid^. — Antennae fihform and quite naked; legs
adapted for swimming and useless for walking.
These true Water Beetles are beautifully adapted for
an aquatic life. Their legs could not be more perfectly
contrived for propulsion through the water; their
method of breathing, while below water, is ingenious
in the extreme, yet many authorities, including Sharp,
 PLATE L

Xylophasia monoglypha 10, Caradriiia quadripunctata 19. Noctua C. nigrum

Dipterygia scabriuscula Jl. Agrotis suffu^a 20. Noctua f estiva
Neuronia popularis 12 Agrotis segetum 21. Noctua zantliographa
Charaeas trraminis VS. Agrotis exclamatioiiis 22. Triphsena ianthina
IMamestra brassicK 14. Agrotis tritici 23. Triphsna fimbria
Apamea basilinea 15. Agrotis strigula 24. Triphffiiia comes
Apamea didyma 16. Agrotis praecox 25. Panolis piniperda
Miana fascinuncula 17. Noctiia plecta 26. Triphsena pronuba
StUbia anomala 18. Noctua augur 27. Tseniocampa gothica
See pai/e 165.
 BEETLES 187

consider them to be but modified terrestrial insects, for

the reason that (1) in general, they are very similar to
the CarahidcB in their organization, and they drown
more quickly than the majority of land Beetles; (2) the
adults can exist perfectly well on land, and are capable
of taking long flights; (3) so far as is known, the pupse
are always terrestrial.
In some species the males and females differ from
one another considerably; in Acilius sulcatus, for
instance, the male has smooth elytra, whilst those of
the female are deeply ridged. Of the hundred or so
British species, the commonest are Agahus nehulosus
and A. bipustulatus , Ilyhius fuliginosus, I, ater^ the
interesting Dytiscus and D. marginalis.
functulatus
The last named, the Margined Water Beetle, is well
worthy of some study by every nature-lover. Its
method of carrying a supply of air beneath its well-
fitting elytra; the suckers on the fore-legs of the male
by which he is enabled to hold the female during the
breeding season the oviposition of the female and the
; ;

curious, predaceous larvae, somewhat reminiscent of

those of the Dragon-flies, will supply material in abund-
ance for the enlightenment of the field naturalist.

Other common pond frequenters of the family are

Colymhetes fuscus, the sole British representative of the
genus, and the minute, rust-red Hyphydrus ovatus.

Series 3. Polymorpha.

Paussid^. — Antennae usually two but

sometimes six
or ten jointed and of extraordinary form; tarsi five-
jointed; pygidium exposed.
These are amongst the most extraordinary of all
188 INSECT LIFE
Beetles. Much remains to be learned of their life-

histories, but, as far as our knowledge extends at

present, all of them dwell in Ants' nests. As a family,
they are easily recognized by their remarkable antennae,
which assume various bizarre forms. Some of them
eject volatile liquids, after the manner of the Bombardier
Beetle (p. 186).
The exact relations of the Paussidce to Ants are
difficult to determine. " When observed in the nests
they frequently appear as if asleep, and the Ants do
not take much notice of them. On other occasions
the Ants endeavour to drag them into the interior of
the nest, as if desirous of retaining their company; the
Paussus then makes no resistance to its hosts; if, how-
ever, it is touched even very slightly by an observer,
it immediately bombards. The Ants, as may be
imagined, do not approve of this, and run away." It
is thought that the Ants derive some nutriment from

the Beetle's secretions; it is certain that the latter

devour the Ants' eggs and larvse.
—
Gyrinid^. Antennae very short; eyes four; mid
and hind legs adapted for swimming.
The Whirligig Beetles are as common in our ponds as
are the Bytiscidce. Their evolutions on the surface of
the water are always attractive, and they are the best
adapted of all insects for their peculiar mode of life.

There are many aquatic insects, a host of terrestrial

ones, and but few that dwell normally on the surface
of the water. Our common species is Gyrinus natator,
sometimes called the " Shiner." When alarmed, its
surface capers cease and it dives beneath the water,
where it clings to some water- weed. Soon it rises again
 PLATE LI

k^^f ^^
8

r^v?"..»*

43 ^^ -

42 '
46 47

1 Melanthia bicolorat: 25 Chesias sparti; 37 Torlrix viridana

2 Hypsipetes sordida 38 Aciptilia galactodactyla
3 Thera obeliseata 39 Hnnychia octomaculata
4 Melanippe hastati 28 Py. 40 Scopula lutealis
5 Melanippe tiuctuata Cida 29 My .phi
I, 41 Tortrix ribeana
6 Anticlea liadiata L.ffim 30 Platyptiliagon. tyla 42 Mixodia Schiilziana
7 Melanthia ocellata Anaitis plagiata 31 Scoparia diibitalis 43 Argyresthia brochella
8 Melanippe montana '
Eubolia liniitata 32 Piunea forficalis 44 Dictyoptcryx
9 Eucosmia undulata Cidaria populate 33 Cranibus pratelliis liergmanniana
10 Cidaria siderata Cidaria fulvata 34 Pyrausta purpuralis 45 Gracillaria alcheiiiiella
11 Eupithecia nanata lirephns parthenias 33 Hydrocampa stagnata 46 Elachista argentella
12 Coremia designata Eurrhypara urticata 36 Carpocapsa pomonella 47 Dasycera sulphurella
 BEETLES 189

to the surface, for the Whirligig Beetle cannot remain

submerged for long; lack of air forces it to ascend.
The larvae are purely aquatic, breathing by means of
gills,which serve the double purpose of acting as
breathing organs and as a means of locomotion. They
are provided with formidable jaws, and are carnivorous.
There is one British species of the genus Orectockilus
but this is a less familiar creature than Gyrinus, for the
reason that it only performs its aquatic evolutions at
night. The giants of the family occur in the tropics,
in Asia and Brazil.
Hydrophilid^.— Antennae short, consisting of one or
two elongate joints at the base, two or more small
intermediate joints, and a terminal part of broader,
pubescent joints; tarsi five-jointed; abdomen with five
visible segments.
This moderately large family of unattractive Beetles
has been but little studied by entomologists. Some
of the genera are aquatic, some are terrestrial. Of the
ninety odd British species, by far the most interesting
and the best known is the Silver Water Beetle, Hydro-
fhilus ficeus—with. the exception of the Stag Beetle,
the largest of the British Coleoptera. " This insect
breathes in a most peculiar manner; the spiracles are
placed near bands of delicate pubescence, forming
tracts that extend the whole length of the body, and
in this particular species cover most of the under-
surface of the body; these velvety tracts retain a
coating of air even when the insect is submerged and
moves quickly through the water. (This gives the
Beetle a silvery appearance, from which it has earned
its popular name.) It would appear rather difficult to
190 INSECT LIFE
invent a mechanism to supply these tracts with fresh
air without the insect leaving the water; but, never-
theless, such a mechanism is provided by the antennae
of the Beetle, the terminal joints of which form a
pubescent scoop, made by some longer hairs into a
funnel sufficiently large to convey a bubble of air. The
insect therefore rises to the surface, and by means of
the antennae, which it exposes to the air, obtains a
supply with which it surrounds a large part of its body;
for, according to Miall, it carries a supply on its back,
under the elytra, as well as on its ventral surface/'
The female constructs a curious egg-cocOon, shaped
like a chemist's retort. In this she deposits about fifty
eggs, attaching them in rows to the side which will
float uppermost. Then she sets the cocoon free to float
on the water, with the portion which represents the
neck of the retort projecting into the air. The larvae
are aquatic and feed upon animal food; from time to
time they are compelled to rise to the sm-face for pur-
poses of respiration.
—
Platypsylled^. Curious parasitic Beetles of which
little isknown. They live amongst the fur of European
and American beavers.
—
Leptinid^. Another very small and little under-
stood family of parasitic Beetles. The British Leftinus
testaceus occurs in the nests of mice and of Bumble
Bees. The mice probably carry the Beetles from one
Bee's nest to another.
SiLPHiDiE. —Antennae usually eleven- jointed (some-
times with nine or ten joints); elytra may or may not
cover the body usually five abdominal segments visible
;

tarsi usually five-jointed, sometimes four-jointed.

 PLATE LII

25

1. Mania maura 9. Dianthtecia capsincola 18. Habrostola tripartita

2. Mania typica 10. Polia chi 19. Plusiachrysitis
3. Taeniorampa incerta 11. Miselia oxyacanthce 20. Plusia gamma
4. Tsniocampa stabilis 12. Agriopis aprilina 21. Plusia testuca;
5. Zantiiia fulvago 13. Phlogopliora meticulosa 22. Anarta myrtiUi
G. Zanthia flavago 1-t. Hadena oleracca 23. F.uclidiagiyphioa
7. Calymnia trapezina 15. Calocampa vetiista 24. Hypena proboscidalis
8. Diantliaecia nana 16. CiicuUia verbasci 25. Catocala nupta
17. Gonoptera libatrix
See page 105.
 BEETLES 191

This family contains the " Burying" or Sexton

Beetles {Necrophorus) and the Roving Carrion Beetles
about a hundred species are known in Britain.
{SilfJia);
Of the Burying Beetles the best known are Necro-
phorus ruspator, N. vespillo, N. mortuorum, and, com-
monest of all, N. humator, the Black Burying Beetle.
All of them, as a glance at the figures will show, are
brightly clad, except for the funereal-looking humator.
They liveupon carrion, and a dead bird or mouse
attracts them from afar, just as larger carrion attracts
vultures. Having found their prize, they assiduously
remove the earth from below it, so that in an incredibly
short time the carcass falls into the Beetle-made grave.
Once buried, the carcass forms the home of the Beetle
home and food for the larvse.
eggs, and, later,
Necrodes littoralis is another native member of the

family. Silpha atrata and S. Iwvigata are sworn enemies

of Snails, though not averse to carrion when other food
is lacking. S. thoracica seems partial to dead nestlings,
and is frequently found in birds' nests. S. sinuata and,
commonest of all British species, S. rugosa feed on
carrion. The four-spotted Carrion Beetle, S. quadri-
punctata, is badly named, for instead of carrion it feeds
upon insect larvae. Most curious of all, however, is
S. opaca, which so far forgets its obHgations as a Roving
Carrion Beetle as to feed entirely upon beet and similar
crops, to which it is a very serious pest.
The family contains several foreign species which
dwell in Ants' nests, and some cave-dwelling species
which are bhnd, but little is known of their life-
histories.
PsELAPHiD^. —Minute Beetles with short elytra;
192 INSECT LIFE
segments of the abdomen scarcely mobile; tarsi three
jointed.
Claviger testaceus appears to be a welcome visitor to
Ants' nests. by the owners as they feed their
It is fed
own larvae, and transported by them from place to
place.
—
Staphylinid^. Easily recognized by their short
elytra and their elongated, exposed and mobile abdo-
mens. Tarsi variable, sometimes five- jointed, some-
times only three, and not always the same on all feet.
The Eove Beetles are an enormous family, and in
Britain alone there are more than eight hundred species.
They vary greatly in size some of them are exceedingly
;

minute, and our *' Devil's Coach Horse," Ocypus olens,

ranks with the largest.
The most interesting point in the life-histories of
certain species of Eove Beetles consists in their habit
of living in the nests of other insects.Atmeles and
Lomechusa are obviously on good terms with the Ants
among which they dwell. Some species of Myrmedonia
are looked upon as unwelcome guests by Ants; there
and
are species, again, which dwell in Termites' nests,
one species, Velleius dilatatus, whose only residence is

the nests of Wasps and Hornets. From the host of our

British species we figure no less than nineteen; but the
entomologist bent on identification should supplement
the figures with descriptions, if he would not be led
astray.
HisTERiDiE. —Neat, jet-black, shining Beetles; an-
tennae short, bent,and clubbed; elytra hard and trun-
cated, leaving two dorsal abdominal segments exposed;
five ventral segments are visible.
 PLATE LIII

1 Silpha thoracica Ips quadriguttata In Sinodendron cylindricum

2 Silpha r.igosa Tenebrioides mauritanicii 16 Onthophagus fracticornis
3. Silpha atrata Mycetophajjiis 4-pustiilatii 17. Aphodius fossor
i Hister unicolor Dermestes lardarius IS Aphodius fimetarius
5. Hister cadaverinus (Bacon Beetle) 19 Aphodius riifipes
Anatis ocellata Byrrhiis pilula (Pill Beetle 2(1. deotrupes spiniger
(F.yed Lady-bird I
Lucanus cervus 21. deotrupes stercorarius
7. Coccinella 7-pimctata (Stag B-etle) 22. Geotrupes sylvaticus
<,7-spot Lady-bird; Dorcus paralielopipedu';
(Small Stag Beetle:
See iKiiic ISO
 BEETLES 193

The members of this family have been named Mimic

Beetles, but the term is not a happy one, although
derived from their scientific name histrio meaning an
actor or mimic. The origin of the name probably arises
from their habit of feigning death, with heads retracted
and all appendages drawn closely to their bodies.
Of the forty British species, we figure Hister unicolor
and H. cadaverinus, both predaceous on the larvae
of Diftera and common in excrement. Another com-
mon species, H. bimaculatus, has a brilhant red spot
near the tip of each elytron. Some of these Beetles,
of the genus Hololepta, under bark, and they have
live
curious flattened forms, well adapted to their mode of
life. There are species, too, which dwell in Ants' nests,
and some which live with Termites.
—
NrriDULiDiE. Small Beetles with eleven- jointed
antennae, the last three forming a club; tarsi five-
jointed, the fourth joint being smaller than the rest;
elytramay or may not cover the body.
These Beetles are of varied habit; nearly a hundred
species areknown in Britain; some live in flowers, some
on carrion, and others on the sap of trees. Many of
them have some resemblance to Rove Beetles, but they
can be distinguished at once by the structure of their
antennae.
Meligethes ceneus, the Turnip Blossom Beetle, is

common on the flowers of Crucifers, which it often

damages to such an extent as to prevent the formation
of seed. Pria dulcamercB lives in the flowers of Solanum
dulcamem. Nitidula bipustulata, a small dull-black
insect with a red spot on each elytron, is common on
carrion. Ips quadriguttata is one of the sap-frequenting
25
194 INSECT LIFE
species, and in common with others of the genus is remark-
able in possessing sound organs on the front of its head.
—
Trogositid^. Closely related to the Nitidulidce,
from which they differ by having tarsi of apparently
four joints; in reahty they are five-jointed, with the
first joint very minute.
of this family, none are
Of the three British species
so well known imported Saw-Toothed Grain
as the
Beetle, Tenebrioides mauritanicus which is now common
,

everywhere. Whether it does more harm than good is

a moot point; it certainly devours the larvse of a number
of grain-eating insects, but it also devours a consider-
able quantity of grain.
Cryptophagid^. —Minute Beetles with the terminal
joints of the antennae swollen; five-jointed tarsi; five
ventral abdominal segments visible, of which the first

is much longer than any of the others.

A small and little understood family, whose chief
interest lies in the fact that the larvse of some species
dwell in Bees' nests, and that the adults, although good
fliers, are transported thereto by attaching themselves
to the Bees when they visit flowers. Other genera are
dwellers in Wasps' nests.
Mycetophagid^. —Five ventral abdominal segments
visible; tarsi four-jointed, except in the front legs of the
male, when there are only three.
These Fungus Beetles are of little interest, except for
the unusual anatomical character of the male described
above. They mostly live either in fungi or below the
bark of trees. There are about a dozen British species,
of which Litargus bifasciatus and Mycetophagus quadri-
fustulatus are amongst the commonest.
 PLATE LIV

I I I I

'^ '^
16 18 19
^'
17
^^
,4 20

Gnorimiis nobilis Phyllopertlia horticola \frriotes obscurus

Melolontlia vuli^aris Athous licemorrhoidalis 0. Athous niger
Cetonia aiirata Corymbites tesselatus 7. Dascillus cervinus
Hopl'ia pliilanthus Lacon muriiuis 8. Elater sanguinolentus
Anomala frischii Corymbites pectinicornis 9. Corymbites liolosericeus
Agrilus aiigiistaUis Corymbites Kiieus 20. Campylus linearis
Serica brunnea Melanotus riifipes
See poj/e ISO.
 PLATE LV

1. Amaurodes passerini 2. Dicranocephalus wallich 3. Ceratorrhina oberthuri

4 Eccoptocnemis reliicens 5. Cheirolasia histrio 6. Coryphocera dohrni
7. Neptunides polychrous 8. Coelorrliina polyphemus 9. Smaragrdesthes certzeni
10. Tlieodosia telifer
12. Ranzania petersiana 13. Lomaptera jamesi
15. F.udicella gralli 16. Megalorrhina pereerrina
See pane 1H3.
 BEETLES 195

CocciNELLiD^.— Antennae eleven- jointed with ill-

developed clubs; head almost covered by the thorax;
and fourth joints being very
tarsi four-jointed, the third
minute; nearly hemispherical in outHne.
Ladybirds are familiar everywhere and to everyone.
We have more than forty species in Britain, and the
family is well represented the world over. In the main
Ladybirds are useful insects, for most species are
predaceous upon Aphides and other soft-bodied insects,
both in the adult and in the larval states Ladybirds
of the genus Efilachia are vegetarians, and are there-
fore harmful when they appear in numbers, as these
Beetles are liable to do.
Amongst the commonest British species are the
Seven-Spotted Ladybird, Coccinella 7 -punctata ; the
Two-Spotted Ladybird, Coccinella hi-punctata ; the Ten-
Spotted Ladybird, Coccinella 10-punctata, and the
Thirteen-Spotted Ladybird, Hippodamia IS-punctata.
There is always a difficulty in identifying these Beetles,
by reason of the fact that the number of the spots on
the specimen does not always correspond to the number
one might expect to find. The reason is that the spots
are very often fused, sometimes to such an extent that
the insect is almost black. Anatis ocellata, which we
figure, is a rare Ladybird in Britain.
The female Ladybirds, of the species named above
at any rate, deposit their eggs upon the leaves of rose-
bushes and the like, which are attacked by Aphides.
The larvae, unlike those of tlie majority of Beetles, are
very active and crawl about rapidly, devouring an
enormous quantity of prey during tneir rambles. Pupa-
tion is quite unlike that of other Beetles, and more akin
196 INSECT LIFE
to tlie same phenomenon in Lefidoftera. Tlie fully
fed larva attaches itself to a support by its tail; its

skin splits, and

pushed back to the tail end; the
is

pupa remains suspended, after the manner of a Butterfly

larva.
One Ladybird has been of real service to mankind,
the little Australian, Novius cardinalis. Some years
ago the orange and lemon groves of California were
threatened with destruction by the Cottony Cushion
Scale, Icerya 'purchasi. Means were taken to find out
whence and it was traced
this noxious Scale originated,
to Australia. In its was not a serious
native country it

pest, for the reason that it was kept in check by a little

red Ladybird. The Beetles were shipped to America
and released amongst the Scale insects in the Cali-
fornian orange groves, with the happiest results, and
the Cottony Cushion Scale is no longer a serious pest
in America. Large breeding establishments have been
formed where the Beetles are raised in quantity, and
whenever an outbreak of the Scale threatens, the insects
are sent to the scene, in order that they may carry out
their good work.
Dermestid^. — Antennae short, with well-developed
clubs; tarsi five-jointed; five visible, movable, ventral
abdominal segments.
These are moderate-sized or small sombre-hued
Beetles, many of them pubescent or bearing bands or
patches of hair. Owing to the fact that nearly all of
them find their sustenance on hides, furs, museum
specimens, skins, cheese, bacon, and the like, they are
known as " Leather '* or sometimes as " Bacon '*
Beetles. There are fourteen species in Britain, and the
 BEETLES 197

Bacon Beetle, Dermestes lardarius, is perhaps the com-

monest species. As our figure shows, there is a broad
whitish or yellowish pubescent band across both elytra,
and six black spots, three on each elytron, make the
Beetle easy to identify. Aitagenus fellio is destructive
to furs; poor food for a Beetle, one would think, but
some of these insects have been raised upon such
uninteresting fare as horsehair, and all of them
can survive for long periods without any food
at all.

Bykrhid^. —^Round or oval Beetles; convex; tarsi

five-jointed.
The Pill Beetles are of little and hardly
interest,
anything is known of their They are
life-histories.
slow-moving insects, and, when alarmed, they draw
their legs close to their bodies, retracting their heads
at the same time. This habit has earned them their
popular name. Our common Pill Beetle, Byrrhus
pilula, is figured.
BosTRYCHiD^. —Tarsi five-jointed, the first being
very small; five visible, ventral abdominal segments;
sides of elytra parallel.
These Beetles are, with one exception, black or brown
in colour, and their elytra are beautifully and charac-
teristically sculptured. The ends of the elytra also are
frequently peculiarly shaped, so that they have a curious
truncated appearance. On these apical portions there
are frequently spines.
In Bostrychids vary from the large Californian
size the
species, which attain a length of fully two inches, down
to microscopic specimens. All of them are wood-
borers, and some are capable of doing a considerable
198 INSECT LIFE
amount of damage. For the most part, they are
tropical or subtropical insects.
Ptinidje. —Tarsi five-jointed, the first joint often
longer than the second; antennae serrate; five visible,
ventral abdominal segments.
These Beetles are almost all of them harmful, either
because they devour food or because they damage
wood.
The family is divided into two subfamilies, the
Ptinidce and the Anobiidce. Of the former the best-
known species is Ptinus fur, an inveterate enemy of
museum specimens and all dried animal matter. The
Anobiidce, as represented by Anohium paniceum, are
little better. This common Beetle is very catholic in
its tastes;opium, cinnamon, ginger, biscuits, and even
cayenne pepper, do not come amiss. It is often called
the Biscuit Weevil, though, needless to say, it is not
a Weevil.
Anohium striatum, Xestohium domesticum, and X.
tessellatum, are only too well known in many of our
"
houses, and are the origin of so-called " worm-eaten
wood. The latter is the insect which has wrought so
much havoc in the beams of Westminster Abbey.
The wood-boring Ptinids are known as " Death
Watches,"' and are associated with much superstition.
By beating their heads upon the walls of their tunnels,
these insects are enabled to make a loud and inter-
mittent ticking noise, which is said to presage death.
As a matter of fact, the ticks are merely sex signals
from one Beetle to another. The Beetle gives a definite
number of taps, followed by a pause, and then repeats
the performance. A captive " Death Watch " makes
 PLATE LVI

f f * t

J f ¥

I *

I *
A GROUP OF TIGER BEETLES
1. Oxychila florida 2. Oxychila g-loriola 3. Pseudoxychila tarsalis 4. Tetracha Carolina
5. Tricondyla aptera 6. Therates labiatus 7. Cicindela sp. 8. Cicindela chinensis
9. Cicindela sp. 10. Cicindela sp. 11. Cicindela sp. 12. Therates whitehead!
13. Cicindela sp. 14. Tetracha australasicE 15. CoUyris sp. IG. Cicindela sp.
See paffe 1S3.
 BEETLES 199

an interesting specimen. By tapping with a pencil or

other object outside the box in which the Beetle is
confined the insect will answer the taps, but only
when the same number of taps is given as is usual
with the Beetle. For instance, some of these Beetles
give five tapsand a pause; a signal to the Beetle con-
sisting of ten taps would not be answered; a five-tap
signal would receive an immediate reply.
—
Malacojdermid^. Tarsi five- jointed; always seven,
and sometimes eight, visible, ventral abdominal seg-
ments; leathery elytra.
As the scientific name of this family indicates, these
Beetles are covered with soft skins; the horny elytra
of almost all the other families are wanting in the
Malacodermidce. The most interesting species of the
family belong to the Lampyrides, for the reason that
they are luminous. In some species the males are the
more luminous, in other cases the reverse is the case.
With our common Glow- Worm, Lampyris noctiluca,
every stage from egg to adult is luminous, and the
females are more so than the males.
Our figure shows clearly the striking difference between
the sexes. The female is so unlike the commonly
accepted notion of a Beetle that to her has been given
the name of Worm. So far as is known, the adults do
not feed; the larvae are carnivorous, and feed upon
living or dead Mollusca.
Other species of this family, belonging to the genus
common upon wayside flowers in
TelepJiorus, are very
the summer-time. Frequently they appear in con-
siderable numbers; the larvse of all these species are
carnivorous and feed upon Earth- Worms, Snails, Slugs,
200 INSECT LIFE
etc. Our common species are T. 'pellucidus, T. Uvidus,
and T. rusticus, all of wliicli we figure.

Species of genus Lyciis, wliicli hail largely from

tlie

Africa, are curious yellow and black insects with almost

leaf -like elytra. Though the genus cannot be mistaken
for any other, the species are frequently so much alike

that they are very difficult to separate.

Clerid^. —Tarsi five-jointed, joints two to four,
furnished with membranous pads; antennse arise from
before the eyes; five or six visible, mobile, ventral
abdominal segments.
These Beetles are nearly all conspicuously marked; all
are predaceous, and their larvae are exceedingly active.
Among the commoner British species are Necrohia
rufipesand N. ruficollis ; the former has been carried
from one part of the world to another in hides, skins,
etc., so that now it is practically cosmopolitan, whilst
the larvae of the latter have acquired the curious habit
of pupating within the puparia of Biftera.
Thanasimus formicarius a Clerid bearing more or less
,

of a likeness to an Ant, as our figure shows, preys upon

Beetle larvse, mainly those with wood-boring tendencies,
Clerids of the genus Trichodes are predaceous on Bee
larvse: T. apiarius on those of Honey Bees, and T.
alvearius on those of Mason Bees. Other species are
enemies of Locusts, and one of the most useful British
members of the family is the beautiful metallic blue
Corynetes coendeus, an inveterate enemy of the wood-
*'
boring Death Watches."
—
Dascillld^. Eleven- jointed antennae, rising from
the front of the eyes; tarsi five-jointed; five visible,
ventral abdominal segments; elytra somewhat delicate.
 PLATE LVII

I -* t

« * I 1

^"^
13 ^ 15 V

f t I « t 19 20

1. Dichirotrichus pubescens 8. Pterostichiis striola IJ. Zabrus gibbus

2 Harpalus ceneiis 9. Pteropticluis madidiis 16. Ap-ibiis nebulosiis
3. Harpaliis nificornis 10. Amara aulica 17. Ilybius fuliginosiis
4. Harpahis latiis 11. Bracliinus crepitans IS. Aiiclumienus angu>ticollis
5. Anisodactylus binotatus 12. Calathus ci.iteloides 19. Ilybiiis ater
6. Amara fiilva 13. Pristonycluis terricola 20. Agabus bipustiilatus
7. Pterostichus picimanus li. Pterostichus rupreus
See page 184.
 BEETLES 201

These little Beetles are not favourites with ento-

mologists, and as a consequence but little is known of
their habits and life-histories. Some of the larvae are
aquatic, some live on fungi, and those of our common
species, Dascillus cervinus, live underground and feed
on roots. Of another British species, Eydrocyphon
deflexicollis, it is said that the adults live upon shrubs

overhanging streams, and that, when alarmed, they

dive below the water.
Elaterid^. —Antennae eleven-jointed, usually serrate
on the inner margin, sometimes pectinate, and rarely
filiform; tarsi five-jointed; the hind-angles of the thorax
usually prolonged backwards; five visible, ventral
abdominal segments.
The members of this family are commonly known
as Click Beetles, on account of the very curious habit,
possessed by most of them, of jumping into the air with
a click. These jumping Beetles bend themselves back-
wards, so that the forward part of their heads and the
hindermost part of their bodies alone touch the ground
then, suddenly straightening themselves, they spring
upwards. The leaping powers of these Beetles vary
with the species; the common British Lacon murinus
does not jump.
Of our other native species we figure the Black and
the Keddish Skipjacks, Athoiis niger and A. hcemor-
rhoidalis respectively; the black pubescent Melanotus

rufifes ; the beautiful, though rare, Elater sanguino-

lentus ; and, most notorious of all, the Common Chck
Beetle, Agriotes obscurus, whose larvae are known as
**
Wireworms/' These larvae are most injurious to the
roots of growing crops. They are elongated, pale-
26
 202 INSECT LIFE
yellow, six-legged creatures, and they spend all their

time beneath the surface of the soil.

There is a remarkable genus of Elaters which hails

from tropical America. All the species of the genus
Pyrofliorus so far described are luminous, but
P. noctilucus is the best-known species. This insect,
commonly known as the Firefly, bears a luminous
patch on either side of the thorax, and another on the
ventral surface of the abdomen. " The light given off

mi.///. 7. 2. a -fe

Fia. 11. An Elater (Skipjack).

At 1, lying on its back; at 2 and 3, in the act of skipping, and thereb}', as

shown in 4, landing upon its legs, D, Spine of the first thoracic
segment (prothorax).

by these insects is extremely pleasing, and is used by

the natives on nocturnal excursions and by the women
for ornaments. . . . The light is said to be the most
economical, all the energy that is used being converted
into light, without any waste by the function of heat
or chemical rays."
BuPRESTrD.ffi. — Antennae short, serrate, and eleven-
jointed; tarsi five-jointed, the first five joints with
membranous pads; abdomen with five visible, ventral

segments; eyes oval.

 PLATE LVIII

1 Fanagaeus -t-pustulatus U Carabus iiemoraiis y( hrus rostratus

C

2. Cicindela campestris 7. Carabus vioiaceus Nebria brevicoilis

;i. Cicindela sylvatica 8. Clivinia fossor 3. Mlaphrus riparius
i. Leistus spinibarbis 9. Carabus arvensis 1 Broscus cephalotes
5. Carabus catenulatus 10. Notiopbilus big-\ittatus 5. Badister bipustulatus

Sfe jiage l.s'o.

 BEETLES 203

These Beetles are remarkable for their brilliant

colouring, metallic blues and greens predominating,
though the species of the genus Capnodis are dull black.
Sternocera is a genus containing some remarkably
ornate species, including S. castanea, with black head
and thorax, the latter studded with red, and rich brown
elytra.
The largest Buprestids are the Catoxanthas. C. hicolor
is bright metaUic green, with a red spot on each elytron;
C. opulenta, a very similar insect, with white instead of
red spots. Julodis contains the most curious species,
all of them ornamented with brightly coloured hirsute
tufts on their thoraces and elytra. J. cirrosa is black
with yellow tufts of hair.
All of the ten British species are small and uncommon;
Agrilus migustulus reflects little of the glory of his
exotic relatives. In America the Red-Necked Cane-
Borer, Agrilus ruficollis, is a considerable pest of black-
berries and raspberries, whilst Agrilus politus attacks
oak-trees, killing off the smaller branches.

Series i. Heteromera.

TenebrioniDuE. —Antennae eleven- jointed as a rule;

front coxae short; tarsal claws smooth.
These Beetles are nearly all black in colour; they
form an enormous family, one of the largest of the
Coleoptera, but few species are native to Britain.
In form the Tenebrionidce are very variable; many
of them are wingless, and most of them appear to feed
upon vegetable matter.
One of our commonest native species is Tenehrio
molitor, whose larvae, known as " Mealworms," bear a
204 INSECT LIFE
striking resemblance to " Wire worms " —in fact, the
similarity in general structure between the larvse of
this family and those of the ElateridcB is remarkable.
*'
Mealworms " are of considerable economic importance.
They are bred in millions as food for insectivorous
birds, and sold to zoological gardens and private avi-
culturists. As with several more important commodi-
ties we in this country had relied altogether on foreign
supplies, so that shortly after August, 1914, our stock
ran out. Efforts were made to breed Mealworms in
Britain, but we apparently did not know the secret of
breeding the insects in large quantities, and the attempts
were unsuccessful.
Frequently in our cellars we meet with a black,
funereal-looking Beetle, whose form is well shown in
our figure. This insect is the well-known Churchyard
Beetle, Blafs mucronata. If we are lucky we shall

come across its much rarer relative, the Cellar Beetle,

B. mortisuga. Many of these insects are very fleet of
foot, and may be found running rapidly over the ground
in dry, sandy places. One of the commonest of our
sand-loving Tenebrionids is Heliofathes gibbus, but the
species of this habit reach their greatest pitch of de-
velopment in Africa, Central America, and the Western
States of North America. The genus Strongylium
contains some brilliantly coloured species.
CiSTELiD^. — Claws comb-like, other characters as
TenebrionidcB.
This family is only mentioned because it is very
closely allied to the last one, and by their claws alone
is it possible to separate individuals of the two families.
Their larvae also are very similar.
 PLATE LIX

10
Iff 1,
'
12 \ 13 14

1. Dytiscns punctulatus 5. Tacliinus liumeralis 10. Leistotroplms miiriniis

(female! 6. CTeo,philu> maxillosiis 11. Leistotrophus iiclmlosus
2. Aciliiis sulcatiis .female) 7. Hydrophilus piceus 12. Colymbetes fufciis
3. Dytiscus marginalis (male) 8. Staphylinus pubescens 1.'}. Staphylinus erythropterus
4. Aleochara fuscipes 9. Gyrinus natator 14. Staphylinus Ci-psareus
See paije ISd.
 BEETLES 205

MELOiDiE. —Heads relatively broad, with abrupt

necks; elytra short and soft; tarsal claws with closely
applied appendages.
The family is divided into two subfamilies, the
wingless Oil Beetles (Meloides), and the winged Blister
Beetles (Cantharides). They are easily recognized by
the characters given above, and they yield to no other
family in point of interest, mainly on account of the
extraordinary metamorphosis of many species. The
early life of one of these parasitic Beetles is fully

described elsewhere (p. 21). Some larvfe, however,

notably those of the genus Epicauta, do not trust to
such happy-go-lucky methods as are usual with the Oil
Beetles, but hunt their hosts, and thus make sure of
attaining their ends.
Many species of Blister Beetles are brilliantly coloured,
yellows or reds and blacks predominating in the colour
scheme others are
; of metalHc green or blue shades yet ;

others are black with neat white stripes. All of them

are amply protected, though conspicuous, by reason of
the fact that they emit a powerful vesicant when
disturbed.
The common British Oil Beetles, Meloe proscara-
bcBus,and the Violet Oil Beetle, M. violaceus, are
famihar objects in the spring. The females especially
are easily recognized, with their much-distended bodies,
heavily laden with eggs. Each mother Beetle lays
approximately ten thousand eggs in a season. Immense
as this figure may appear, it is by no means inordinate
when the numerous risks which must be overcome
before the adult stage is reached are taken into con-
sideration.
206 INSECT LIFE

Series 5. Phytophaga.

The members of this series are easily recognized if it

be borne in mind that " the tarsi have never the
Heteromerous formula, the head is not constructed like
that of Rhynchofhora^nov the mouth and feet like those
of Adepkaga ; the antennae are different from those of
the Lamellicorus." Practically all of them are vegetable-
feeders; hence the name of the series.
Bruchid^. —Presternum very short, perpendicular
in front; hind-femora more or less thickened.
AH the members of this family are seed-eaters;
accordingly, many of them are looked upon as pests
by farmers. Another result of this seed-eating habit
is that many species have become so distributed over

the world as to be practically cosmopolitan. Bruchus

chinensis is a case in point. Hailing originally from
Eastern Asia, this chestnut-brown Beetle is now found
the world over, and in quantities too.
The Pea Weevil, Bruchus pisi, deposits its eggs on
pea-pods; the larvae tunnel in the pods till they reach
the ripening peas. In the seeds they take up their
residence, one in each seed; there they complete their
larval growth and pupate. Bruchus oUectus is a com-
mon bean pest which continues to breed amongst and
feed on stored beans. Bruchus lentis, another pest of
pulse, cannot complete its development in one seed,
but requires two for the purpose. The largest members
of this family belong to the South American genus
Caryohorus. The family, though one of the most
important economically, has been little studied by
entomologists. But little reliable literature exists on
 PLATE LX

1. Philoiitluis aeneus
I.athrobium elongatun 14. Necrophorus niortuorui
2. Ocypus morio Oxyporus rufiis
3. Ocypus olens 15. Siipha Itevifrator
I.atlirobium horeale
4. Ocypus cupreus Quedius picipes 16. Necrophorus vespillo
5. Quedius lateralis Olophrum piceuni 17. Siipha quadripunctata
6. Xantholinus jrlabratus \'ecrodes littoralis 18. Necrophorus ruspator
Necrophorus humator 19. Siipha simiata
See pa ye lUl.
 BEETLES 207
the BnichidcB, and their study is by no means easy.
Owing to the fact that nearly all of these Beetles are
clothed with a very transient pubescence, their identifi-
cation, in the absence of well-marked characters, is
rendered still more difficult.
DoNACiD^. — Antennae slender; head narrowed behind
the eyes; square thorax, much narrower than the
elytra.
These Beetles are interesting on account of the fact
that they are aquatic in the larval stage. None of them
are common in Britain, but the most likely species to
be met with are Donacia crassises and D. semicuprea.
Still more curious are the members of the genus

Hwmonia, which are aquatic in all stages; H. curtisi

is a very rare British species.
The extraordinary feature of Donacia larvae is not
that they dwell below the surface of the water, feeding
upon the roots of aquatic plants, but that they derive
the air necessary for their well-being from the plants
on which they feed. The roots and stems of all aquatic
plants are well provided with air-channels, a fact of
which the larvae are evidently well aware, for they
puncture the plant tissues in order to tap the air-
supply. When fully fed, they construct cocoons,
which they affix to their food-plants. These cocoons
are filled with air, for the larvae before pupating take
the precaution of cutting a channel in the supporting
plant in such a manner that an air-channel and the
interior of the watertight cocoon are in communication.
Sagrid^.— An unimportant but highly ornamental
family. These Beetles are dazzHng in their splendour,
competing even with the Bufrestidce in the brilliance
208 INSECT LIFE
of their metallic colouring. The only species of any-
economic importance is Sagria splendida which damages ,

the stems of sweet potatoes. S. serapkica is a dazzhng

violet-blue West African species, and the Javan S.
huqueti, the largest species of the family, is emerald-
green with a red suture to its elytra.

Criocerid^. —Closely allied to the two preceding

species; mandibles bifid at the tip.
The larvae of many species of this family are remark-
able in that the anus is dorsal instead of ventral or
terminal. As a result the voided excrement is forced
on to the creature's back, where it is retained by a
viscid substance, to act as a protection. This curious
method of self-preservation may be well studied in the
larvae of Crioceris merdigera, a common pest of lilies.
The most notorious member of the family is the
Asparagus Beetle, Crioceris asparagi. The adults are
conspicuously marked red and black insects, with four
whitish dots on the elytra, so arranged that they form
a cross. The females lay curious black, barrel-shaped
eggs, in rows, on the asparagus heads. These eggs,
projecting at right angles to the surface of the stem,
are all too familiar objects. The
larvae, which have
not the habits of mentioned above, feed
self -protection
voraciously on the asparagus and ruin it for market
purposes.
Clythrid^. —Antennae serrated; eyes large; thorax
short and, at the base, as broad as the elytra. Broad,
oblong, parallel-sided Beetles.
The species of this family are nearly all yellow and
black in colour. There is only one British species,
Clythra quadripunctata
 PLATE LXI

If 9 M
IT '
I\ I
I
1
^
9
"
10

M
le plate is
A
I

GROUP OF CLICK BEETLES

designed to sliow the remarkable variety of form and colour in the far
No. 9 is the so-called Fire-fly.
See pape 201.
 BEETLES 209

The most remarkable fact about these Beetles is

that the females, when depositing an egg, hold it with
their hind-legs till they have covered it with an en-
velope of excrement. This envelope becomes leathery,
and forms a case for the larva, in which it dwells,
enlarging it from time to time, during the whole of
its life.

Cryptocephalid^. —Long thread-like antennae; ely-

tra usually covering the abdomen.
These are small Beetles which frequent flowers.
Many of them are brilliantly coloured, and blacks,
greens, blues, violets, reds, yellows, and metallic copper
shades predominate. A by no means uncommon
British species, Cryftocefhalus sericeus, is yellowish-
green in colour.
—
EuMOLPiD^. Oval bodies; thorax only slightly nar-
rower than the bases of the elytra; antennsG long, with
terminal joints larger than those at the base.
Another family whose species are resplendent in
brilliant metallic armour. There are few European
species; one of them, however, Adoxus vitis, a black
insect with reddish tibiaeand antennae, is a serious vine
pest. The South American Eumolpus fulgidus is a
beautiful Beetle its colours vary from brilliant metalHc
;

blue to green, and in some lights it reflects a warm

copper-red hue.
Chrysomelid^. —Terminal joints of antennae barely
longer than the others; head separated from thorax;
elytra convex, oval,and entirely covering the body.
The Chrysomelidce are a numerous family and contain
some injurious species. They are often referred to as
Leaf Beetles, and sometimes as Golden Apple Beetles.
27
210 INSECT LIFE
Of the British species we figure Chrysomela nmrgiimlis
and C. stafhylea. A more beautiful, but very rare,
native Leaf Beetle is C. cerealis. It is brilliant golden-
green, with a purple lustre; its thorax and each elytron
are decorated with three deep blue bands, and its
suture is of the same colour. It is one of the most
ornate of a gaudy family.
As an example of the varied hues of the Chrysomelas,
Kirby says: " C
hanJcsii is bronzy green; C. Umhata is
black with a red border; C. rufa is pale brownish-red.
C. goettingensis is dark violet, and C. scJiach is blue-
black."' The tropical American genus Doryophora in-
cludes some beautiful species. D. punctatissima a large ,

species, has a black head and thorax, and its pale

yellow elytra are studded with small black spots. The
most sombre species belong to the genus Timarcha, of
which we figure the curious Bloody-Nosed Beetle,
T. tenehricosa so named on account of its similarity to
,

some of the Tenebrionids. It is the largest European

Chrysomelid, sluggish and wingless, and when touched
it emits a blood-red fluid; hence its popular name.

The North African T. turbida is a very similar insect.

By far the most notorious of all the family is the dreaded
Colorado Beetle, Leftinotarsa decemlineata. Originally
finding its nourishment on wild SolenacecB in the Rocky
Mountains, it took to evil ways and became a
later
very serious pest of potatoes. Though introduced into
this country from time to time, it has always been
eradicated before it could do serious damage.
IlALTiciDiE. —Long cylindrical antennae inserted close
together between the eyes; hind-legs longer than the
others and with thickened femora.
 PLATE LXII

1. Cyphogastra javanica 6. Sternocera orissa 12. CatONantha bicolnr

2. CoiioKnatha practiossissinia 7. Sternocera pulclira j:i l l;ryi^ocl.rl)a buqueti
3. Euchroma goliatli S. Chrysochroa fulmiiians 11, Julocis cirrosa
4. Belionota snmptuosa !). (latoxantha opulenta l-^ I'liiloctcanus niaitlamli
5. Sternocera eschscholzi 10. Jnlodis sp. l(i Dupre^tis gigantca
11. Chrysochroa vittata
See iinne 20'3.
 BEETLES 211

Minute Beetles, usually of bronzy blue or black

colour. They are agile jumpers, and on that account
are usually known as Flea Beetles, Turnip Fleas, or
even as Turnip Flies. There is no need to labour the
point that the term " Fly " is a misnomer. The species
of the two common genera, Haltica and Phjllotreia, are
nearly all injurious to Cruciferous plants.
Galerucid^. — Antennae long, slender, and cylindri-
cal, ijiserted close together between the eyes; legs long
and slender; femora never thickened; body long, usually
somewhat depressed.
These Beetles often resemble the Grioceridm in general
form and colouring, but may easily be distinguished
by their antennae. We figure Galeruca tenaceti, a species
frequently met with on tansy Many species are
flowers.
injurious, notably the Elm Leaf Beetle, Galerucella liiteola.
Hispid^. — Antennae inserted close together on the
front part of the head, which latter organ is bent
downwards.
This is a small family of tropical Beetles. The
members of the genus Hispa are peculiar in that their
elytra and thoraces are covered with long and sharp
spines. The pupae of many species are also spinous;
the larvae, so far as is known, live between the upper
and lower epidermis of some favoured leaf till nearly
fully fed; then they invariably forsake their temporary
home and tunnel into the midrib of a second adjacent
leaf to pupate.
—
CASsrDiD^. Agree in most characters with the
HispidcB, but the margins of thorax and elytra are so
expanded that they have earned the name of " Shield "
or " Tortoise " Beetles.
212 INSECT LIFE
Many Tortoise Beetles are beautifully coloured during
life. Several, including tlie British species Cassida
viridis and C. equestris, are green; others are black and
orange or black and red, but most beautiful of all are
certain iridescent species. Unfortunately, the colours
in most cases fade soon after death; our figures are
made from faded specimens.
The larvae of these Beetles have the peculiar habit of
covering themselves with excrement —
not owing to
their anatomical structure, as in the case of certain of
the Crioceridw, but of set purpose, and by the aid
of a forked appendage on the hinder portion of their
bodies.
Sharp records a most extraordinary costume which
is assumed by the larvae of a South American Tortoise
Beetle, of the genus Porfhyraspis. "P. tristis is
apparently a common insect at Bahia, where it lives
on a cocoa-palm. The larva is short and broad, and
completely covers itself with a very dense coat of fibres,

each many times the length of the body and elaborately

curved, so as to form a round nest under which the
larva lives. On examination it is found that these long
threads are all attached to the anal extremity of the
insect,and there seems no alternative to believing that
each thread is formed by small pieces of fibre that have

passed through the alimentary canal, and are subse-

quently stuck together, end to end. The process of
forming these long fibres, each one from scores of
pieces of excrement, and giving them the appropriate
curve is truly remarkable. The fibres nearest to the
body of the larva are abruptly curled so as to fit exactly
and make an even surface; but the outside fibres stand
 PLATE LXIIt

~^ '^
01
21 23 19
20

18 > '7 'S

22

1. Uonacia crassipes ]l). Biaps mucronata 16. Otiorrhynchiis tenebri-

2. Donacia semicuprea t'liurchyard Beetle") cosus
3. Clythra quadripmictata 11. Heliopatlii-s gibbus 17. I.iophlcBus nubilis
4. Trinarcha tenebricosa 12. Tenebrio molitor 18. Barynotiis obscunis
5. Chrysorrn-'la iiiarBiiialis (Meal-worm Beetle) 19. Fhyllobius calcaratus
6. Chrysomela stapliylea 13. Meloe proscarabceus 20. Hypera punctata
7. Adimonia tanactti (Common Oil Beetle) 21. Cleonis sulcirostns
8. Cassida equestris U. Meloe violaceus 22. Hylobins abietis
9. Cassida viridis 15. Attelabus cnrculionoides 23. Balanimis g-landinm
Sfie paffe 203.
 BEETLES 213

out in a somewhat busliy fashion. The construction

is much like that of a tiny bird's nest."
The American genus Himatidium has longer and more
slender antennae than the species of other genera, and
its thorax does not conceal its head. H. latreillei is a
beautiful bronzy-green colour, with an orange-brown
thorax. The most remarkable Cassids are the tropical
American species of Galas f idea. From Guiana hails
C. grossa, with red elytra on which are depressed black
dots and reticulations.
—
Prionid^. Front coxae large and transverse thorax ;

with distinct side-margins; head not flattened in front;

eyes kidney-shaped; antennae long; mandibles very
large, especially in the males.
These Beetles are somewhat reminiscent of the Stag
Beetles (LucanidcB), but theymay always be distin-
guished by their antennae. Many of them are of large
size and of a curiously flattened form, and chestnut-
brown is the prevailing colour. The sole British species,
Prionus coriarius, is by no means common; it is a dwarf
compared to some of the tropical species, seeing that
it measures little more than an inch in length.

The largest species is the South American Titanus

giganteus. Well-grown specimens measure as much as
seven inches in length and two inches across the folded
elytra. This Beetle has short but powerful mandibles
and a formidable spine on either side of its thorax.
From South America also hail some genera which
depart from the sombre colouring usual to the family,
—
and also the pale brown Macrodontias insects with
enormous toothed mandibles. All the larvae are wood-
borers.
214 INSECT LIFE
CERAMBYcrD.s:. —Front coxae not greatly extended
transversely; thorax not margined; head produced in
front, but never vertical; eyes always concave and
more or less surrounding the base of the antennsB.
The largest British Cerambycid is the Musk Beetle,
Aromia moschata, a metallic-green insect with a spine
on either side of its thorax. It is a sluggish insect, and
may often be found sunning itself on the decaying
wood of willows, on which its larvae feed. When
handled it emits a musk-like aroma; hence its name.
The genus Clytus, of which there are several European
species, is notable on account of its remarkable mimicry
of Wasps. Nearly all the species are black with yellow
markings; all are active on the wing. CalUchroma is
a genus noted for the brilliant metallic blues and greens
of most of the species. Some species of the South
American genus Cosmosoma are peculiar in that their
antennae bear dense tufts of hair about midway along
their length. Coremia Mrtipes, another Cerambycid
from the same country, has similar though denser tufts
on the hind-tibiae. It flies slowly over dead timber in
new clearings, and when on the wing resembles a large
Culex.
Lamiid^.. —Front coxae usually round and deeply
embedded ; front tibiae with a slanting groove on the
inner side; head vertical, flattened in front; wings
sometimes absent.
These Beetles may always be distinguished from those
of the last family by the position of the head. The
family is a large one, and contains some exceedingly
ornate species.
Our largest British Lamiid is Sa'perda carcharias, a
 PLATE LXIV

1. Zopliobas sp. I). Blaps prodiicta 19. Opatium sub;:iilcatiim

2. Erodius( 1. Eleodes dentipes £0. Scpidiiim wagiitri
3. Adesmia miLrocephala 2. Aiachala biiqueti 21. Praocls submetallicus
4. Tenthyria rotimdata if. Asida bilplioides 2:^. Platynotiis excavatus
5. Epitragiis fiiscus i. Gyriosomusluczoti 23. Saiagriis IcevicoUis
6. Zophenis mexicanus 5. Nyctaclia Itevis 21 HcBcinonia filibiiiter
7. Eurychlora major G. Prionotlieca coronata 20. Hcmicyclus grr.ndis
8. Akis elongata 7. Epipedonota ebeiiina 2G. Uolichodcriis KIiiru
9. Scotobius clathratus 8. Trachynotus sp.
 BEETLES 215

black insect densely clothed with yellowish down; its

elytra terminate in a short spine, and it frequents willows
and poplars. The largest species is the beautiful
Brazilian Macropus longimanus. It is black marbled
with red and grey, and its fore-legs are enormously
developed in length; hence its name. Batocera is a
common East Indian genus of large size, and most of
the species are brown spotted with white. Nearly as
large as any of the Batoceras is the African Petrognatha
gigaSj a grey species with a large black patch on the
outer edge of each elytron. Monohammus is one of the
largest genera of the order; it is of almost world-wide
distribution, and most of the species are of sombre hue.
Any description is inadequate to portray the beauty of
form and the brilliant colouring of these elegant Beetles
a good representative collection alone can convey an
idea of the wonders of the Lamiidce.

Series 6. Rhynchofhora.

—
Anthribid^. Antennas with a short first joint, not
elbowed and often long; third tarsal joint small and
partially concealed by the second joint; pygidium
exposed.
Nearly all the species of this family are tropical, and
one or two are agricultural pests of some notoriety.
They are frequently confused with the Weevils, though
the two families are quite distinct, as a comparison of
our British Platyrrhinus latirostris with any Weevil will
show. The species vary considerably in size; our
native Choragus sheffardi is one of the smallest, and
certain exotic species, with their antennse included in
their measurements, attain considerable dimensions
216 INSECT LIFE
Certain of these " long-horned
'*
species bear consider-
able superficial resemblance to Longicorns.
All the AnthrihidoB are dull brown or grey coloured
insects; frequently they are mottled, barred, spotted,
or otherwise decorated with lighter shades.
CuRCULiONiD^. —Antennse usually elbowed, first joint

long; head prolonged into a beak of variable shape and

dimensions; larvae legless and usually curved.
The Weevils are undoubtedly the most harmful
family of the Coleoptera. Larvae and adults are vege-
tarians, and there is no part of a plant which is immune
from the attacks of some species of Weevil; roots, stems,
back, leaves, flowers, fruit, and seeds may any or all
of them be attacked by Weevils. We can rarely eat
our dessert without encountering the obnoxious larva
of the Nut Weevil, Balaninus nucum. A near relative,
the Acorn Weevil, B. glandium, does not force its

attentions upon us to the same degree, because it feeds

upon a fruit which is unfitted for human consumption.
The Pine Weevil, Hylobius ahietis, has the character
of being our worst forestry pest. It is peculiar for the
reason that all the damage is caused by the adult
Beetles, w^hich eat the bark of Coniferous trees, so that
it has the appearance of having been attacked by some
rodent. The larvae feed upon dead wood.
Weevils of the genus Anthonomus damage flower-
buds; Anthonomus grandis is the notorious Cotton
Boll Weevil of America, a pest which had done more
harm than any single species, and is only checked from
further destruction by climatic reasons; it cannot with-
stand the cHmate of the more northern cotton fields.

A. signatus lays its eggs in the buds of strawberry-

 PLATE LXV

f f i VI 3

6 ^ 8

I f 'If
II
I 12

I T Y I

1. Moluris gibba M rarUiutlnirax walckenffin 1

2. Cionopiis tibialis i) SiiMiiSi Imni bicolor 1

3. Spheniscus erotyloides h> St.oiitrylium sp. 17 l'\ tli. i

dcinx-s: us
4. Micrantereiis anomalus II Ne- (i;rcna pp. is. .\ i Ik, I.mmUis
5. AmaryRrnus sp. 12 ,\ll"ciila sp. 111. I'lilo (itr\ .i rufipes
6. Helops vulcanus 13. Omoplilus fp. 2ll. l.ajri la liirta
7. Adelium sp. 14. Omoplilus betnlae 21. Statira sp.
 BEETLES 217

flowers, with the result that no fruit is formed; sub-

stituting apple for strawberry, similar remarks apply-
to the Apple Blossom Weevil, A, fomorum.
The Plum Weevil, Conotrachelus nenuphar, awaits in
hiding till the fruit of plums, cherries, or peaches is

formed. At this period the females make numerous

holes in the fruit, and in each hole they deposit an egg.
Needless to say, the larvae feed upon and ruin the
ripening fruit. Other Weevils which prefer the fruit
to the flowers from which the fruit should arise, are
the Grain Weevil, Calandra granaria, and the Rice
Weevil, C. oryzce. These little pests, like some of the
Bruchids, have been carried all over the world in the
grain upon which they feed and in which they breed.
Some Weevils construct ingenious leafy nests for
their larvse. Of these, the work of the Birch Weevil,
Rhynchites a marvel of engineering skill. The
hetulce, is

ingeniously rolled leaves, cut and made into funnels by

these insects, may often be seen upon young birch-trees
during the summer months. Attelahus curculionoides
is another, though less skilled, nest-builder. While
searching for the Birch Weevil, there is every likehhood
of finding a beautiful little emerald-green Weevil,
Phyllobius calcaratus, which sometimes literally swarms
upon our hedges. This Beetle is one of our most
little

beautiful native insects. Compared, however, with some

of the exotic Weevils, exquisite insects of delicate blue
and green hue, it is dingy.
Of the more sombre-coloured native Weevils we
figure Otiorrhynchus tenebricosus ; another hedge -fre-
quenter in the shape of Liofhlceus nuhilis; Barynotus
ohscurus, with a penchant for hiding beneath stones;
28
218 INSECT LIFE
Cleonus sulcirostris, a harmless species confining itself

to thistles; and Hypera punctata, which is often taken

at considerable distances from any food-plant.
Weevils are, for the most part, small or medium-sized
Beetles. One or two species attain considerable dimen-
sions, notably the Palm Weevil, Rhynchophorus pal-
marum, of the West Indies, whose fat grubs find some
favour as human food. A short acquaintance with
these insects in the field reveals a curious trait, common
to nearly all species. When alarmed, instead of run-
ning away or taking to flight, they fall to the ground,
curlup their legs, remain motionless and sham dead.
This trait is especially common amongst the dull-
coloured species, which, on account of their colour, are
exceedingly hard to detect when they reach the ground.
ScoLYTiD^. — Antennse short and clubbed.
These Beetles are closely allied to certain of the
Weevils. Nearly all of them are wood-borers, and
many are exceedingly destructive.
To any but entomologists the Beetles are little known;
to nearly everyone their w^ork is There can
familiar.
be few people so little observant that they have never
seen some tree with bark so loose that it easily peels
away. Where stem and bark come in contact, the
Beetles have made their tunnels in all directions, so
that both parts of the tree are marked. The tunnels
or burrows are very characteristic of the species which
make them, and an expert can tell at a glance, from
the nature and direction of the burrows, what species
of Scolytidhad carried out the work.
Some known as Ambrosia Beetles, fill their
Scolytids,
tunnels with a certain fungus, which thrives on the
 PLATE LXVI

^ /
I * I f 5

I
«

1 l.ampyris noctiluca (ma G. Tlianasimiis formicai 1. Callidium viulacsum

2. Telepliorus riisticiis 7. Xecrobia rulipes 2. Aromia moscliata
'i. Telepliorus lividiis 8. Asemum striatum :i Rhagium bifasciatum
4. Telepliorus pellucidus I). Prionus corinarius -1. Saperda carcharias
5. Lampyris noctiluca fen 10. Strangalia armata o. RhaRium inquisitor
 BEETLES 219

exudations of tlie tree. The fungus serves as food for

the Beetle larvae; it renders the work of the insects
more obnoxious to the forester, for the growth hastens
the decay commenced by the excavations of the insects
it sometimes increases so rapidly as to choke up the

tunnels and kill the inmates.

Among the common British Scolytidce, the Elm Bark
Beetle, Scolytus destructor, is a serious pest, causing the
bark of its food-plant to peel of! in sheets. One species
of tree may harbour several species of these Beetles.
The Scots fir, for example, may have its uppermost
shoots attacked by Pityogenes hidentatus, its young
branches by Hylastes palliatus, its stem by Hylurgus
piniperda, and its roots by Hylastes ater.
Of the deep-boring Scolytids, Beetles which do not
confine themselves to the bark and subjacent parts,
species of the genus Trypodendron are the worst offenders,
and in Britain we have T. domesticum, partial to oak,
beech, and birch, and T. Uneatum, a pest of Conifers.
Oaks are also frequently riddled by the all too common
Xyleborus dispar.
All these Beetles, as may be inferred from their habits,
are of small size in colour they can
; show nothing beyond
blacks and shades of brown. Though the injury caused
by a single Beetle may be small, when, as is usual, the
Scolytids appear in force their damage is widespread,
and in America they have spread over areas so great
as fifty thousand square miles and destroyed millions of
feet of lumber.
Brenthid^. — Antennae not elbowed; rostrum
straight.
These most bizarre of all the Coleopiera are practically
220 INSECT LIFE
all confined to the tropics. It would be difficult to
imagine more curious insects than certain of these Beetles
In some species the snouts are prolonged to an extra-
ordinary extent.There are species in which the males
have no snouts, but formidable mandibles instead*
The females use their snouts to bore holes in wood
for egg-laying purposes, and in this connection Sharp
says that, in one species, the snout of the female is apt

to become fixed during the operation. " The male

then extricates her by pressing his heavy presternum
against the tip of her abdomen; the stout fore-legs of the
female serve as a fulcrum and her long body as a lever,
so that the effort of the male, exerted at one extremity
of the body of the female, produces the required result
at the other end of her body."
Certain species are exceedingly thin, elongated, and
delicate. It is believed that all these attenuated species
are carnivorous, and that their forms are specially
adapted to enter the burrows of wood-boring insects
for the purpose of preying upon the larvse. The apices
of the elytra in many species have curious prolongations
whose utility is not known. The antennae of all species
are freely mobile on a ball-and-socket joint; they
remain mobile even in the dried state.

Order Streps ipter a.

Stylopid^. —Males small; fore- wings much reduced;
hind- wings very large vnih radiating veins. Females
minute sacs, the smaller end forming the head.
These curious parasitic insects are placed with the
Coleoptera by many entomologists, including Sharp;
here, however, they are considered as a distinct order,
PLATE LXVII
 STYLOPS 221

according to Nassonoff and Von Siebold. They are

most aberrant creatures; all of them are parasitic on
either Hymenoftera or Rhynchota. Of the latter forms
practically nothing is known; of the former much
remains to be learned.
Bees of the genus Ealictus and Andrena and Wasps
of the genus Polistes are specially liable to become
" stylopized "—i,e., attacked by the
parasite. Unlike
many parasites, Stylops does not kill its host.
The
females may be seen projecting
from between the
abdominal segments of the Bee or Wasp, and so slight
is our knowledge of these anomalous insects that it is

uncertain whether the head or the tail end projects.

Undoubtedly the most extraordinary effect of " stylo-
''
pization is that the secondary sexual characters of

the host are affected. For instance, there are many

species of Hymenoptera in which the males are of a
totally different colour to the females. In the " stylo-
**
pized individuals of such species the males or females
may not only fail to develop their characteristic colour-
ing,but may even assume the livery of the opposite sex.
Exactly how the Strepsiptera reach their hosts has
never been fully explained. In the genus Stylops, all
the members of which are Hymenopterous parasites, the
larvae attack their host larvae, penetrate below their
skin, and both parasite and host develop concurrently.
When the time arises for the host to pupate, the male
parasite makes its change from the larval state in the
manner common to other insects. The female parasite,
on the other hand, remains within her host and at the
right moment pushes her way between the latter 's
abdominal segments. The female Stylops never moves
222 INSECT LIFE
from the position she takes up at this juncture. The
active males are short-lived; those of the genus Xenos
exist for but a quarter of an hour; they lose no time
in accompHshing their one object, the fertilizing of the
immobile females.
Enormous numbers of larvae are produced by each
female. They crawl about over the body of their host
in such numbers as to give it a powdered appearance.
In the case of social Bees and Wasps, it is an easy
matter for the parasite larvae to reach the host larvae;
in the case of the solitary Hymenoftera the young
parasites must needs await some means of transport
'* "'
to the nest of a new host, for the stylopized females
never build nests. Thousands must perish without
ever finding a host; the fact that they are produced in
thousands points to very considerable wastage. At
any rate, the Stylops larvae somehow contrive to attach
themselves to the hair of a healthy insect, and she
unwittingly conveys them to her nest.
PLATE LXVIII

a tj o >,
 ANTS, BEES, AND WASPS 223

CHAPTER VII

HYMENOPTEKA
Insects with four sparsely veined wings, often clothed
with short bristles; mouth furnished with mandibles
and proboscis; females with large ovipositors, often
modified into a sting; metamorphosis complete.
This order includes the well-known Bees, Wasps, and
Ants; members, without exception are of the greatest
its ,

interest to the entomologist. Bees, Wasps, and Ants

of many species have the social habit highly developed
— in fact, these insects and the Termites are the only
species which dwell in colonies. The solitary species
of the order are no less interesting. The nests of
certain solitary Bees are ingenious in the extreme; the
methods by which some of the Sand Wasps store their
nests with living, though benumbed, food would be
beyond belief had not reliable mtnesses testified to the
veracity of the earlier observers. The story of Ants'
guests, of Bee *' cuckoos,'' and other invited and un-
invited hangers-on, would fill a bulky volume in
itself.

Most of the parasitic insects belong to this order.

The life-histories of the Gall-flies, some species having
a single generation of both sexes, some a single genera-
tion of females only, and others two generations, one
224 INSECT LIFE
of females only, the other of both sexes; the study of
their curious galls —these
and a thousand other details
combine to make the Hymenoptera a most attractive
order to the student of insect life.

The species comprising the order fall naturally into

two suborders
I. Sessiliventr.es. —
Hymenoptera with the basal
segments of the abdomen not constricted to form a
" waist " or petiole, and ovipositors designed for boring
or cutting, never for stinging.
II. Petiolata. — Hymenoptera with the basal seg-
''
ments of the abdomen constricted to form a " waist
or petiole; ovipositor usually a sting.
The Sessiliventres form a small division of but
three families. Apart from the structural characters
of the adults, the larvae of the majority of these insects
closely resemble those of Lepidoptera^ except for their
greater number of legs.
The Petiolata are divided into three series
Series 1. Parasitica. —Ovipositors exserted or con-
cealed, frequently of very great length; larvae parasitic
upon other insects.
Series 2. Tubulifera. —Terminal segments of the
abdomen forming a retractile tube, in which a small,
imperfect sting is situated; larvae usually live in the
nests of other Hymenoptera.
Series 3. Aculeata. —Very frequently the ovipositor
is modified into a sting.
The Aculeata may be said to contain all the Hymen-
optera which cannot be included in either the Parasitica
or the Tubulifera.
 PLATE LXIX

COCOON OF PALM WKEVIL

 SAWFLIES 225

SUBORDER SESSILIVENTRES.
This division is much smaller than Petiolata ; to the
latter division all the better -known families of the order
belong. Here there are but three families of insects
for the most part inconspicuous, but also, with few
exceptions, highly injurious.
—
TENTHREDrNiD^. Antcnuse not elbowed, short;
wings large and considerably veined; ovipositor saw-
like; larvae resemble those of Lepidoptera in form, but
possess six to eight, in place of five, pairs of legs.
The Sawflies are so called on account of the structure
of the ovipositor. Each of these organs consists of
a pair of saws side by side, and their owner can move
them up and down with a saw-like motion when she
wishes to cut a slit in some plant tissue for the purpose
of depositing her eggs therein. The majority of these
insects are injurious pests among crops and in gardens.
Amongst the British species, of which there are
many, the commonest and most destructive are the
Currant Sawfly, Nematus rihesii, and the Gooseberry
Sawfly, N. ventricosus, whose larvae, being gregarious,
rapidly defoliate currant and gooseberry bushes re-
spectively. Two other common species of the same
genus, N. galUcola and N. salicis-cinerecB, form galls on
willow-leaves, for the reason that the larvae remain
within the leaf-tissues instead of emerging to the
surface.
Lophyrus pini is a common pest of Conifers; Hylatoma
rosce, in its larval state, defoliates rose-bushes; its green
Caterpillars are remarkably similar to those of Lepi-
doptera. There is no member of the family, however,
29
226 INSECT LIFE
more interesting tlian tlie Pear Slug, Eriocampoides
limacina. The adult Sawfly is a shiny black insect,
about a fifth of an inch in length. The female slits
the under-side of a pear-leaf and deposits an egg in
the pocket-like cavity thus formed. The egg hatches
in a short time, having previously increased in size,
probably owing to the assimilation of some of the
juices of the leaf. The larva escapes from its pocket
by making a semicircular cut in the upper surface; at
first it is very pale yellow, almost white in colour.
Very rapidly, however, the larva darkens in colour, for
the reason that it covers itself with a dark olive-green,
shiny secretion. At the same time it alters consider-
ably in shape; its anterior end becomes swollen and its
head retracted into the enlarged portion. Feeding
takes place on the upper surface of tbe leaf, and con-
sists not only of the leaf-tissue, but of the larval skin
after each moult. When the last moult takes place
the larva makes no meal of its skin, but leaves it upon
the leaf. In colour it has changed to orange, and its

body no longer covered with slime. Crawling down

is

the stem to the ground, the larva builds a little earthen

cell for itself just below the surface; in this cell pupation

takes place.
In addition to pear-trees, apple, cherry, and plum
are also attackedby limacina. " Frequently the larvae
appear in such numbers as to do serious damage. Some-
times,when the slugs are very abundant, the sound of
the eating of myriads of mouths resembles the falling
of fine rain upon the leaves."
Parental care is so rare, except among the social
insects, that the case of Perga lewisii, an Austrahan
 WOOD WASPS 227
Sawfly, is worth quoting. The female deposits her
eggs in sHts near the midrib of a eucalyptus-leaf. " On
this leaf the mother sits till the exclusion of the larvae;
and as soon as these are hatched the parent follows
them, sitting with outstretched legs over her brood
protecting them from the attacks of parasites and other
enemies with admirable perseverance."
—
SiRiciD^. Large insects with cylindrical, awl-like,
exserted ovipositors; abdomens not constricted into a
petiole at the base.
The Wood Wasps are conspicuous-looking insects,
which, owing to their formidable-looking ovipositors,
often strike terror into the person beholding them for
the first time. In reality they are quite harmless to
human beings, for they possess no sting.
The two most frequently met with in Britain
species
are the Giant Wood Wasp,
Sirex gigas^ and the Blue
Wood Wasp, S. noctilio. In form the two species are
very similar; in colour, gigas is black banded with
yellow on the abdomen, whilst noctilio is of a dark
metallic blue colour.
The females deposit their eggs in wood; they prefer
Conifers,and usually only oviposit in felled timber.
The larval life is considerably protracted, and all the
while considerable tunnelhng takes place, to the ulti-
mate ruin of the timber.
In America the Pigeon Tremex, Tremex columba, has
similar habits, but prefers living trees, especially maple.
Cephid^.— Antennae long; wings large; ovipositor
needle-like and exserted. Larvae live in stems of
plants.
The most notorious species of this family is Cephus
228 INSECT LIFE
fygmcBus. In some countries, on tlie Continent and in
America, for instance, it does considerable damage.
The female bores into wheat-stems with her o\dpositor,
lays her eggs therein, and the larvae complete the work
of destruction. Pygmwus is not common in this
country.
The American Phyllaceus integer has a more interest-
ing life-story. The female punctures a willow-twig just
below the growing point with her ovipositor; she then
directs that organ obUquely into the pith and deposits
her eggs. Wisely, lest the growth of the willow should
injure her eggs, she girdles the twigs just below the
puncture she has made; this causes the death of the
shoot, and its ruin for basket-making.

SUBORDEK PETIOLATA.
Series 1. Parasitica.
—
IcHNEUMONiD^. Antennae with more than sixteen
joints; abdomen constricted at the base into an elon-
gated petiole, or not constricted; ovipositor often long
and protruded.
The Ichneumon Flies as these insects are often
wrongly termed, for they are not Flies, are all parasitic
insects. The family is a large one, and is divided into
a number of subfamilies. The order is by no means
an easy one for the entomological student, and those
who wish to attempt systematic work should not essay
the effort unless they have access to a representative
collection.
The methods of oviposition differ with the species;
some deposit their eggs on the bodies of their hosts.
 PLATE LXX

I 3

f
X
I
A GROUP OF WFKVll.S
The fiprures give a tiood idea of tlie striking colouring wliicli occurs in many species of tliis family.
No. 7 is the Palm Weevil, the largest of the Curculionidae.
See pane SlU.
 ICHNEUMONS 229

some within them. In the majority of cases the larvsB

of Lepidoftera are the hosts of these insects; a few
species, however, prefer Beetles and others, Hymenoftera.
Certain species of Pimpla, notably P. rufata and P.
fairmairii, are known to be parasitic upon Spiders.
The long ovipositors of many of the IchneumonidcB
appear to be somewhat of a hindrance to their owners;
there are species in which these organs measure as
much as four inches. The true ovipositor is always
protected by a sheath of four stylets equally as long
as itself. Possibly all the species with inordinately
developed ovipositors prey upon insects whose larvaB
burrow in wood or some other medium. Certainly this
is the case with the common British Rhyssa 'persuasoria
whose hosts are the larvae of the Wood Wasp. Now,
the Wood Wasp deposits its eggs in timber, and its

larvae make extensive and deep-seated tunnels in the

same material.So deeply do they bore that it is
impossible for Rhyssa itself to reach them; it accom-

plishes its object, however, by the aid of its long ovi-

positor, which it plunges far into the recesses of the
Wood Wasp's larval tunnels, and deposits its egg in its
victim.
Braconid^. —Very similar to IchneumonidcB ; an-
tennae generally with more than sixteen joints, the first
and third being longer than the second; second and
third abdominal segments fused.
This family has been neglected by entomologists, and
from a systematic point of view is in a chaotic state.
The species are frequently so similar to the Ichneumons
that only the expert can separate the two families.
Many exotic Braconidce are exceedingly ornate insects,
230 INSECT LIFE
black and yellow or red and yellow being the prevailing
colours of the family, though there are a number of
self-coloured, red species.
The genus Aphidius includes several species parasitic
upon Aphides ; in consequence, they are insects to be
protected. The commonest British species, at any rate
the species whose activities are most easily observed,
is Apanteles glomeratus, a parasite of the Cabbage White

larvse. This Braconid lays a number of eggs inside the

body of its host, and its larvse feed upon the fatty
matter with which they are surrounded. When fully
fed, the parasitic larvse leave their host to spin small
silken cocoons, in which they pupate. A. formosus
makes curious stalked cocoons.
EvANiiD.^. — Antennae thirteen or fourteen jointed;
abdomen attached to the upper part of the metathorax;
ovipositor straight.
Species of the genus Evania can always be distin-
guished by their short, compressed abdomens attached
by a slender petiole to the upper part of the thorax.
In outline the female abdomen is triangular, that of
the male oval. The colour of the Evaniids is invariably
jet black.
These insects are widely distributed, probably because
they are parasitic upon the eggs of Cockroaches. Evania
appendigader is the most widespread species. It is
black; its fore- wings barely span an inch, and its hind-
legs are quite twice the length of its body. The larvae
of this parasite live within and feed upon the yolk of
the Common Cockroach's eggs.
The genus Foenus is remarkable for the long, slender
abdomens of its species, in striking contrast to those
 PARASITIC WASPS 231

of Evania. Fcenus jaculator, a by no means uncommon

insect, frequents the nests of Crahro and oviposits in
its larvae.

CHALCmiDiE. — Antennae elbowed, usually six to thir-

teen jointed; wings but little veined.
This is the largest and most interesting family of the
parasitic Hymenoftem. Nearly all the species are
parasitic; a few, belonging to the genus Megastigmus,
live in seeds, and some, of the genus Isosoma, are gall-
makers. Till quite recently this fam^ily had been much
neglected by British entomologists, for what reason it is
difficult to say, unlessthe minute proportions of the
majority of the species acted as a deterrent; it could
not have been because the Chalcididce lacked interest.
Howard, who has studied the family in America, says:
" Nowhere in nature is there a more marked example
of the correlation betv/een structure and habits than
occurs in this family. This correlation descends to the
relation between the parasites and their hosts, so that
it is possible for an experienced person, on seeing a
new species of Chalcis Fly, to tell precisely what kind of
an insect it will be found to be parasitic upon."" The
habits of these Hymenoftem are so varied that it is
impossible to take one as a type of all the family.
Some species are parasitic upon Lepidopterous larvae,
—
some on Diptera, some on Bees in fact, they are the
most assiduous of all parasites, and the most cathoHc
in their tastes. Many of them are of beautiful metallic
sheen, and many also are interesting structurally.
Species of Chalcis, for example, have their hind-femora
so much thickened that they may equal the abdomen
in size. Leucospis, a non-British genus, has species
232 INSECT LIFE
with ovipositors recurved over the back of the
abdomen
The utility is not confined to their
of ChalcididcB
parasitic activities In fig-growing countries the services
.

of a species of Blastophaga are utilized to bring about

the fertihzation of the fig-flowers. The inflorescence
of the fig is pecuHar; the flowers grow within a hollow
receptacle quite out of reach of the majority of insects.
Blastophaga , however, enters the inflorescence, brings
about fertilization, and thus causes the fruit to ripen.
This semi-artificial fertilization of figs is known as
" caprification."
The life-cycleof many Chalcids is completed very
rapidly. Howard has carefully noted the time taken
by Ewplectrus comstockii to pass through its transforma-
tions. The egg stage lasted two days, the larval stage
three, the pupal stage the same length of time, a com-
plete generation in eight days. " It is altogether the
shortest development of any Hymenopterous parasite
that has been studied."
Podagrion fachymerus has the very interesting habit
of shelteringbelow the wing of a female Mantis as she is
forming her egg-mass. From this advantageous position
the Chalcid can lay her eggs amongst those of the Mantis.
—
Peoctotrypid^. Antennae elbowed, ten to sixteen
jointed; bodies long and slender; wings with very few
veins.
These insects are even less known than the ClialcididcB ;
as a family they are the smallest of all insects. Some
idea of their size may be gleaned when we learn that
sometimes as many as six larvae may live within a
single Lepidopterous egg, feeding upon the yolk and
 GALL FLIES 233

undergoing all their transformations therein. Another

genus, Trichacis, possesses species that " develop in the
nervous system of one of the little gall midges, while
the larvae of another genus, Polygnotus, develop in the
digestive tract of the same insect." Spiders' eggs, also
those of Lepidoptera and Coleoptera, are parasitized by
Proctotrypids ; they also live in the larvae of Diptera,
Coleoptera, and small Hymenoptera.
Marchal described a curious life-history of a species
of Encyrtus. The insect lays its egg within that of a
Tineid Moth, and, instead of a single Encyrtus larva
appearing, as might be expected, a number hatch from
the single egg, owing to this egg becoming divided into
a number of embryos.
Cynipid.^. —Antennae straight, thirteen to fifteen
jointed; wings with few veins; ovipositor concealed.
The Gall Flies, so called, are not by any means the
only gall-makers in the insect world, nor, indeed, are
all the CynipidcB gall-makers, for some species are
parasitic upon Aphids and larvae of Diftera.
For a long time it was thought that no male Gall
Flies existed; to this day the males of some species have
never been discovered, but it is highly probable that
in these species timeand research will show them to
have a spring brood of females and an autumn brood
of both sexes, a common happening with Gall Flies.
The alternation of generations, so common amongst
Cynipidce, has led to further confusion, and many of the
spring broods have been described as different species
to theautumn broods. The preponderance of females
is advantage to the insects, for they are much attacked
of
by parasites, mainly Chalcididce ; this, again, is yet
30
234 INSECT LIFE
another factor making the study of Gall Flies difficult,

for frequently parasites instead of the rightful owners

appear from the galls.
" One of the most peculiar facts connected with the
Gall Flies is that a particular part of the plant is always
af!ected by the same species, and that each species of
the same generation always produces a deformation
or gall of exactly the same character, so that the gall
alone identifies the species of insect, and, in fact, for
a long time generic and specific names were given to the
galls before the insects were named."
Many theories have been suggested to account for
the formation of galls by these insects. No gall begins
to develop till the larva hatches from the egg, and it

is probable that the larva excretes some substance

which causes the rapid growth of the plant cells in its
immediate vicinity. The oak is the tree most favoured
by Gall Flies; there are twenty-four quite common oak
galls, and many more less frequently met with. One of
the most curious of our native galls is the Bedeguar
Gall, or " Robin's Pin Cushion," formed by RJiodites
rosw, which deposits its eggs in a leaf-bud, with the
result that, instead of the formation of normal leaves,
the well-known, characteristic green or red hairy galls
are formed.
Series 2. Tubulifera.
Chrysidid^. —Cuckoo Flies or Ruby Wasps. Insects
with hard, often deeply sculptured, metaUic green or
blue dorsal integuments; antennae thirteen- jointed and
elbowed. Terminal abdominal segments in the form
of a tube, which can be retracted or extruded; hence the
name of the series.
 RUBY WASPS 235

Before going further, it is well to remark that these

insects are not Fhes, as their popular name suggests.
Many insects, Dragon-flies, May -flies, and Green Flies,
amongst others, are not Flies, but still they bear titles
to which they have no right.
The Ruby Wasps are easily recognized; their brilliant
colouring of metallic sheen, often with ruby-tipped
abdomens, and their ceaseless activity, render them
conspicuous. All the score of British species are small,
and no members of the family attain large size. They
are widely distributed over the world, and all of them
deposit their eggs in the nests of other Hymenoptera ;
hence their name of Cuckoo Flies.
The majority of Chrysids are parasitic upon the Mud
Wasps, Odynerus. These little solitary Wasps leave
their nests exposed while they hunt for provender with
which to stock their larders, so the evil work of the
Cuckoo Flies is easily accomplished. Our native Chrysis
ignita deposits its eggs in the nests of the Mud Wasp,
Odynerus parietum ; G. hidentata favours the home of
0. spinifes. The former Cuckoo Fly has been observed
to deposit a single egg in the nest of its host the latter ;

lays as many as ten in each nest, but invariably all

except one are infertile. In both cases in fact, in —
every observed case of parasitism by these insects
their larvae feed upon the larvae of their hosts. It is
remarkable also that, except by colour, it is almost
impossible to tell the white parasite larva from the
yellow host larva.
An American species, G. ccerulans, is parasitic upon
the Potter W^asp, Eumenes fraterna. Sometimes, as
Howard remarks, there is confusion in the host nest.
236 INSECT LIFE
Odynerus goes in search of food, and leaves its cell
unguarded; along comes a Trypoxylon —a Sphegid
—
with Cuckoo habits and stores the host cell with its
own provisions, closing the entrance against the return
of the owner. On the arrival of the Odynerus her first
care is to open the cell once more; having done so,
further food must be found, and while she is away
Chrysis comes on the scene, deposits an egg in the
newly opened cell, from which a larva emerges that is

destined to survive the progeny of host and primary

parasite.
To the genus Cleptes belong the only species of the
family capable of stinging Not only so, but in general
form they more closely resemble the aculeate Hymen-
oftera than do the other Cuckoo FHes. They are
parasitic upon Saw^ies.

Series 3. Aculeata.
This series is somewhat artificial, since it does not
include all the Hymenoftera capable of stinging. Various
other suggestions have been made for the better classi-
fication, and many of them are worthy of every con-
sideration. The arrangement adopted here, however,
is generally accepted, so that at least it has the merit
of popular approval.
The Aculeates are subdivided into four divisions
1. Anthophila, or Bees.— Body clothed, in part
with plumose hairs; mouth-parts elongated and usually
tubular, flexible at the tip. Adults all winged. Often
dwell in societies.
2. DiPLOPTERA, OR Wasps .—Anterior wings folded
longitudinally when at rest; no scales or nodes on the
 PLATE LXXI

#
^
6

I
a

•#4!^|p^^

f
» ^^^

A GROUP OF BEES
1. Hombiis lepidariiis 2. Bombus hortorum 3. Bombus muscorum
4. Bombus venii>tus 5. Xylocopa sp. (i. .Xnthopliora sp.
7. Halictiis rubicundii N. Megacliile sp.
9. Megachile sp. 10. Bombus terrestris 1 1 Cu?lioxys sp.
12 Bombus lucoriim \A Xylocopa sp. 14. Apathus vestalls
 BEES 237

basal segments of the hind-body; hind-tarsi designed

for walking. Either dwelling in societies or solitary.
3. FossoRES, OR Digger Wasps. No plumose hairs —
on body; no longitudinally folded wings; no scales or
nodes on basal segments of the hind-body.
—
4.'FoRMicn)^, OR Ants. The segment or two seg-
ments behind the posterior part of the thorax either
small or irregular and very mobile; trochanters not
divided. Live in colonies.

Division 1. Anthophila, or Bees.

Bees are nearly always hairy insects; they have
peculiarly modified mouth-parts, which serve their
owners and entomologists a good purpose in collecting
nectar and in forming a guide to classification respec-
tively; their hind-legs are modified —greatly so in some
species. The pecuHar plumose hairs with which many
Bees are clothed presumably assist in the collection of
pollen, and the presumption is strengthened by the fact
that many parasitic Bees, which gather no pollen, are
destitute of these hairs. Some parasitic Bees, however,
possess these hairs, and opponents of the pollen-collect-
ing theory have not been slow to point to these species
as confirmation of their own assumption that feathery
hairs are not designed for gathering food. That pollen
does adhere to these modified hairs is by the way.
As already remarked, the tongues of Bees are used
for takingup nectar. They are complex organs, and
these pages are not the place to enter into minute
anatomical details. There are three types of Bee
tongue — (a) short and forked, (6) short and pointed,
(c) long and pointed. With these organs the insects
238 INSECT LIFE
take up nectar and swallow it; it passes to ttie honey-
sac, where it remains till the Bee returns to her nest,
where it is regurgitated as honey. During the period
in the honey-sac part of the water is removed, and
various secretions, including formic acid, which acts

Fig. 12 -Left Hind-Leg of a Working Female Honby-Bee

(Strongly Magnified).
On the left, viewed from the outer side; on the right, viewed from the
inner side. S, Femur; Sch, tibia; F, foot; E, two pointed claws
with balls between them; Kb, pollen-basket; B, brush.

as a preservative, are added from glands of the bee. The

regurgitated honey requires further treatment before
it is fit for consumption.
The legs of Bees are beautifully modified to suit the
work of their owners. The hind-legs show the greatest
variation from the normal, especially in the females, for
on these organs the pollen is mainly carried. Those
Bees which carry dry pollen have densely haired hind-
 BEES 239

legs; those which carry the paste-like " Bee bread/' a

mixture of pollen and nectar, have hollowed tibias
edged with stiff bristles " pollen-baskets'" in which —
to carry their burdens. Males and parasitic Bees do
not possess pollen-carrying modifications, and where
drones exist they also are destitute of these appendages.
The young larvae of all Bees, whether Solitary or
Social, are reared in nests or cells constructed either
by the parent Bee or by workers, or, in the case of
parasitic Bees, by some other insect. They are never
exposed and left to their own devices, as, for instance,
are Lepidopterous larvse. The Social Bees feed their
larvae upon honey and pollen, after the manner of birds)
Solitary Bees store sufficient food for the needs of their
young, deposit an egg on the stored food, and seal up
the cell, leaving the larva to fend for itself. Parasitic
Bees usually lay their eggs in the cell of some Sohtary
Bee; their larvae always either hatch first or grow
quicker than those of their hosts, so they are well
provided for by their host's food store and, if necessary,
its egg or larva. With the exception of these parasitic
Bees, which sometimes eat their host's progeny, all
larval Bees are fed upon vegetable matter or material
of vegetable origin.
The classification of Bees is in a most unsatisfactory
state. To avoid confusion as far as possible, we treat of
—
these insects in two sections (1) the Solitary and (2) the
Social Bees.
1. Solitary Bees.

Short Forked-Tongued Bees. — ArcJiiapidce of

Friese. We have sixteen species of these Bees in Britain,
all belonging either to the genus Colletes or to Prosopis.
240 INSECT LIFE
Of the latter genus there are ten British species;
they have earned their generic name from the white
faces of the males. They are all small, almost non-
hairy creatures, and their hind-legs are not modified
for In general colour they are in-
carrying pollen.
variably black, and most of them emit a pleasant odour.
They usually construct their cells in the pith of bramble
stems, and cut or broken ends of these stems are in
much request by the
little Bees. Each cell is lined with
a thin membrane, and is stored with a mixture of honey
and pollen. The latter is swallowed by the female
along with the nectar, being swept to her mouth by her
hairy front legs. Frequently a Chrysid larva usurps
the Prosopid cell; they may often be found living on
the stores of our commonest species, Prosopis signata.
The genus CoUetes is smaller, so far as this country is
concerned, for we can only boast of half a dozen species.
In general appearance these moderate-sized Bees closely
resemble the genus Andrena. With a single exception
they are all well clothed with brown hair; the middle
and hind legs of the females bear pollen-carrying hairs.
Their nesting habits are peculiar. They burrow in the
ground, making unbranched tunnels, which they line
with a membranous substance, which, by the way, is

of glue-like consistency when first formed; hence the

name of the genus. The burrows are then divided into
separate cells, six to eight innumber, by the same
material, and each one is filled with semi-liquid food
in which an egg is deposited.
CoUetes, of which our commonest species is C. suc-
*'
cincta, is subject to the attentions of a cuckoo," just
as is Prosopis, but in this case it is not a Euby Wasp,
 SOLITARY BEES 241
but a long-tongued Bee of the genus Epeolus, which
shares, or rather usurps, its home. Sometimes
host
and parasite frequent the same flowers. Tansy is the
favourite of Colletes daviesanus and its
'*
cuckoo,"
Efeolus variegatus.
Andrenid^.—Short pointed-tongued Bees.
This the largest section of British Bees, no fewer
is

than a hundred and twenty species belonging thereto.

The largest native genus is Andrena, containing about
fifty species. In appearance these Bees closely resemble
Honey Bees, but they are smaller. They are among
the first insects on the wing in the spring. Their nests
are always made in the ground, frequently in gravel
paths, and, though true Solitary Bees, they frequently
nest in close proximity to one another.
One of the earhest Andrenas to appear is the little
red Andrena fulva, an attractive little creature,
whose
burrowing habits may easily be observed. These early
arrivals have hibernated below ground through
the
winter. As soon as they arouse themselves they
set
to work to make nests for theirown families. Tunnels,
often a foot in length, are made in the earth, and from
the main shaft numerous side-galleries are run; in each
one, before it is closed, there is deposited an egg and
a store of pollen and honey. By summer the eggs are
hatched and the larvae are fully fed; in early autumn
the perfect insects have emerged from the pupse, but
they remain in their subterranean homes till the first
warm days of spring summon them to activity.
A. vicina passes through its life-cycle more rapidly,
and the adults are on the wing in the summer. A.
argentata, resplendent in its silvery hirsute clothing,
is
31
242 INSECT LIFE
another late Andrena, for it may be seen assiduously
collecting nectarfrom heather-flowers late in August.
The Andrenas are preyed upon by " cuckoos " of the
genus Nomada. These Bees, which are invariably of a
yellow and black or red and black colour, appear to live
—
on the most friendly terms at any rate, the attentions
of the " cuckoos " are never resented. The Nomada
have few hairs, and their legs are not adapted for
carrying pollen. All the species are parasitic, and their
hosts are always Andrenas. Friese relates that he has
frequently seen Nomada latlihuriana and Andrena ovina
flying about together.
Reference has been made to the friendly relations
of host and parasite, and the fact may seem strange.
Further consideration shows that, after all, the pheno-
menon is not so peculiar as it appears at first. The
parasites do not interfere with their hosts, and the
latter do not feed their larvae from time to time, as do
the social insects. " The Wild Bee that seals up its
cell when it has laid an egg therein, and then leaves

it for ever, has no conception of the form of its progeny;

never in the history of the race of the Andrena has a

larva seen a perfect insect and survived thereafter;
never has a perfect insect seen a larva.''
The genus Halictus includes our smallest British
Bees, and they are interesting also from another point,
for in them we see the beginnings of a social life. A
common burrow serves for several females; each side-
gallery the preserve of one individual, but the single
is

front-door is the thin end of the wedge. " A sentinel is

often stationed at the entrance, and there is close behind
the doorway a small recess into which the sentinel can
 SOLITAEY BEES 243

step whenever she wishes to allow a member of the

establishment to pass in or out." This semi-social
condition is specially developed in Halictus lineolatus
and H. sexcinctus.
These Bees are but slightly clothed with hair, and
some of them, especially the exotic species, are of dark
metallic hue. Some species appear to have more than
one generation a year, but our commonest species,
//. morio^ is only one-brooded. A striking peculiarity
of these Bees, which cannot fail to strike the collector,
is that females only are taken in the spring, and that

later in the year males preponderate. The nests of

H. quadricinctus and of H. maculatus have been minutely
described by Verhoeff, and it is to be regretted that
lack of space forbids our quoting him.
Just as Andrena had its " cuckoos," so has Halictus ;
in this case they are Bees of the genus Sphecodes. These
Bees appear to be on the border-line between criminal
and decent living habits. Some authorities deny their
parasitic propensities; they are ill-fitted for ordinary
Bee labour, having very slightly developed pollen-
collecting apparatus. It is doubtful, however, whether
Sphecodes is, generally, degenerating into an evil-doer
or is struggling to lead a better life as a law-abiding
Bee. It is against them that S. ruhicundus has been
taken from the nest of //. quadricinctus, and ;S. suh-
quadratus has been observed fighting with H. malachurus^
prior to taking possession of the latter 's nest. Evidently
the relations between Halictus and Sphecodes are not
so friendly as between Andrena and Nomada.
All the species of this genus are small, brilliant,
polished insects with red and black or red abdomens;
244 INSECT LIFE
one of our commonest species, S. gihhus^ is very typical
of the genus.
The genus Dasypoda contains one of the most striking
of our native Bees, D. hirtipes. A large Andrena-like
insect, its body is heavily clothed with tawny hair,
its black abdomen is banded witli white hair, and the

hind-legs of the female bear exceedingly long, bright

golden tufts of branched hairs, which give the insect
its striking appearance.

Dasypoda tunnels depth of two

in the earth to the
feet or so. At the end burrow she constructs
of her
half a dozen chambers, in each of which she places food
and an egg. The pollen which forms the larval food is
carried to the nest on the hairy legs of the mother Bee
frequently her load weighs half as much as herself.
In the nest she moistens her burden with honey, kneads
it to a pasty mass, and rolls it into a ball. This opera-
tion is repeated with load after load, each subsequent
load being added to the first, as a schoolboy builds up
a big snowball, till a large-sized pollen-ball is formed.

Three feet are made of the same material, to raise the

ball from the floor, and an egg is laid on the top. The
larva hatches from the egg in a few days, and finds
itself upon a food-mass nearly a hundred and fifty

times bigger than its own body. It devours the food

layer by layer, so that the mass may retain its shape,
and it voids no excrement till the whole is eaten.
—
Apid^. ^Long pointed-tongued Bees.
This section, so far as our native Bees are concerned,
is rich in genera, but poor in species, there being less
than fifty, including the social species.
Anthophom is a large and widely distributed genus.
 SOLITARY BEES 245
Our native A. 'pili'pes, a very early spring arrival, bears
a remarkable resemblance to a small Bumble Bee.
The black, hairy females have orange legs, and may
easily be distinguished from the chestnut-brown males,
whose middle legs bear long grey and black hairs.
Their nests consist of short burrows in sand or clay
banks, and the few cells they contain are lined with
clay by the mother Bee. One species, A. fersonata^
is said to require two years to complete its life-
cycle.
This genus has its" cuckoos '' of the genus Melecta
,

and A. 'pilipes is favoured by the attentions of the

closely related though dissimilar M. armata, a slightly
hairy, somewhat elongated insect, whose black abdomen
is marked laterally with white spots. In this case the
relations between host and parasite appear friendly,
but another species of Anthophora has been observed
to resent the attentions of M. luctuosa.
The Carpenter Bees, Xylocopa, are the largest mem-
bers of the family, some of the tropical species measur-
ing nearly two inches in length. They have broad,
somewhat flattened bodies, sparsely clothed with hair
on their abdomens, except on the edges, and in colour
they are mostly black or blue-black. There are few
European species, of which the most widely distributed
is Xylocopa violacea ; none of them occur in Britain.

Their popular name

is derived from their habit of

making tunnels dead wood for nesting purposes.

in
These Bees display an extraordinary amount of patience
in making
their cylindrical burrows and their galleries •

All thework is accomplished by their powerful

mandibles, and the cells of the galleries, each containing
 246 INSECT LIFE
an egg and food, are all separated by partitions formed
of salivaand wood shavings.
Euglossa is a tropical American genus, noted for and
named from the inordinate length of the proboscis,
often exceeding the length of the insect's body. Flat-
tened, plate-like tibise, highly polished on their outer
surfaces and fringed with bristles, are also character-
istic of the genus. The colouring of many of these
Bees is beautiful in the extreme, metalHc greens,
purple, violet, and gold, being mingled in perfect
harmony.
Chalcicodoma is another interesting genus not repre-
sented in this country. The members of this genus are
known as Mason Bees, a name, by the way, which is
also applied to species of the genus Osmia.
The nesting habits of Chalcicodoma muraria may be
taken as typical of the genus. The nest is built upon
some solid foundation, a stone for preference. At first

a single cell is built of earth mixed with saliva and

incorporated with carefully selected small stones. After
the edifice has reached the height of an inch or so,
food in the shape of honey and pollen — ^the latter
carried on the ventral abdominal hairs is placed —
within to the height of about half an inch, an egg is
deposited on the food, and the cell is closed. Nearly
a dozen of these cells are made, and the whole group is
then covered with a dome-shaped cement shelter " about
the size of half an orange.'* In spite of their protection,
the larvae of these Bees are parasitized by the Chalcids
Leiwosfis gigas and Monodontomerus nitidus, which
perforate the shelters and cell caps; by the Bee Stelis
nasula^ which does likewise; and by another Bee,
 SOLITARY BEES 247

Dioxys cincta, which lays its eggs in Chalcicodomas

stored food before the cells are completed. In fact,
sixteen or more insects are known to prey upon
G. muraria.
Of the Carder Bees we have but a single species, the
Wool Carder, Antliidium manicatum, in Britain. It is
a sturdily built black Bee, with yellow abdominal
markings which give it somewhat of a Wasp-like appear-

ance. burrows of other insects, or seeks

It uses the
out some naturally formed hole which will serve its
purpose, and lines its nest with " wool " derived from
hairy plants. The nest-cavity is doubly lined, first
with rough wool, then comes an inner, finer layer of the
same material, which is cemented to retain the honey
stored within. A. diadema lines hollow stems with
vegetable wool, and divides the cavity thus lined into
several chambers. A. sepemdentatum and A. hellicosum
nest in discarded Snail-shells, and instead of using wool
they close their nests with resin. These Bees all possess
pollen-carrying hairs on their ventral abdominal
segments.
The genus Osmia is noted for the remarkably varied
nesting habits of its species. They are all short, stoutly
built insects with very long tongues, and their ventral
segments are densely clothed with pollen-carrying hairs,
which are frequently brightly coloured.
Osmia hicolor frequently nests in Snail-shells, after
the manner of some of the Anthidiums. 0. rufa,
recognized by its orange coat and horn-like protuber-
ance on its face, either selects a similar site or some
bmTows in the ground. 0. leuco-
cavity in a wall or
melana usually and 0, tridentata invariably nest in
248 INSECT LIFE
bramble-stems after having hollowed out the pith. The
cells of these nests are placed in line along the pith and

always the farthest cell from the mouth is the first to

be completed. This being so, it is not surprising that
the Bee in the end cell is the first to be ready to emerge.
It bites through the partition which separates it from
the neighbouring cell, and if its neighbour be ready to

depart also, all is well. If it encounters a pupa it will

patiently await its development and departure. Should

the vigil be long-continued, by biting away the sur-
rounding pith it attempt to make a larger hole
will
and room to pass. Should failure ensue, further waiting
is cheerfully accepted one individual will never damage
;

another in its attempts to escape. This trait led

Fabre to make the very interesting discovery that,
though the Osmias are not averse to bringing harm to
other insects, they will never injure their own species.
The " cuckoos " of Osmia belong to the genus Stelis.
We have already mentioned S. nasiita, which deposits
several eggs in each cell of the Mason Bee, after breaking
down the latter 's masonry. S. minuta deposits a single
egg in the cell of 0. leucomelana. The larvae of host and
parasite live for a time upon the stored food of the
host mother; the Stelis larva grows quicker than its

companion, and with the consumption of the last

remnants of food host and parasite meet; a short
struggle ensues, in which the latter is always victorious;
he devours his victim. Stelis signata is parasitic upon
Anthidium strigatum, which it closely resembles so —
closely that this Stelis was for long considered to be an
Anthidium.
The Leaf-Cutter Bees, Megachile^ are the most
 PLATE LXXII

NEST OF LEAF-CUTTER BEE

The plate shows three series of ctlls arranged in borings in wood
 SOLITAKY BEES 249

interesting of all tlie Solitary Bees. We have eight

species in this country, and they resemble stout Honey
Bees; they have wide heads, and their pollen-bearing
hairs are situated on their ventral abdominal segments.
As with Osmias, these Bees rarely make burrows of their
own, but search for suitable natural resting-places or
appropriate the discarded burrow of some other creature.
MegacJdle alhocincta nests in old Earth-Worm burrows
M. circumcincta bores a tunnel in rotten wood. All of
the species, however, line their nests most ingeniously
with portions of leaves or petals. The nests are com-
posed of thimble-shaped cells formed of leaves and
placed end to end along the burrow. The circular
pieces of leaf are cut by the Bees with mathematical
exactness; pieces of varying size are used for the end,
the sides, and the top of each cell, and the leaf-edges

are glued together by a waxy substance derived from

the body of the mother Bee. Each cell contains a store
of pollen and honey and an egg.
The " cuckoos " of Megachile belong to the genus
** "
Cwlioxys, C. quadridentaia being the special cuckoo
of M. circumcincta. These Bees are quite distinct,
usually of a black or dark blue ground colour prettily
marked with pale blue; non- or very slightly hairy,
and with rather acutely pointed bodies.
Eucera longicorms^ the Long-Horned Bee, is a large
insect of a chestnut-brown colour, and is rendered
conspicuous by the enormous development of the
antennae in the males. The females have these organs
of ordinary proportions. It nests in the earth in an
enlarged chamber at the end of a short burrow.
Sawpoda bimaculata, another of our Solitary Bees, is,
250 INSECT LIFE
curiously enough, most easily recognized by the dis-

tinctive high pitch of its buzz. It is an active insect

which nests in the ground, and is possessed of lovely
greenish-blue eyes.
Social Bees.

These insects differ from all the preceding species in

the important fact that they dwell together in com-
munities, in which there are at least a fertile female or
" queen,'' small sterile females or " workers,'' and
medium-sized males or partially sterile females called
**
drones." They differ also in that their larvae, instead
of being sealed up in a cell along with a store of food,
are subject to unremitting care and attention.
The best known of all these social insects are un-
doubtedly the semi-domesticated Honey Bees, Apis
mellifica.They are considered to be the most highly
developed of the Anthofhila. In point of interest no
insects surpassand few equal them. Publishers, how-
ever, even the most lenient, set a limit on an author's
verbosity, and the Honey Bee does not lack its literary

champions of every degree; its merits have been sung

in verse and lauded in prose. A fair-sized library
could be filled with works dealing with this industrious
insect; on that account we perforce omit it from our
pages.
Bombus, the genus of Bumble or Humble Bees, has
more than a dozen British representatives. The nest-
ing habits of the species fall naturally into two classes;
for some are subterranean nest-builders, others nest on
the ground. They all differ from Social Bees of the
genus Apis in that their workers are merely imperfect
females, whereas those of the latter genus are struc-
 SOCIAL BEES 251

from either males or females. Again,

turally different
each colony ends with the year; a few hibernating
females begin new colonies in the spring.
Of the subterranean nesting Bumble Bees, our com-
monest species are the Earth Bumble Bee, Bombus
terrestris, and the Stone Bumble Bee, B. lapidarius.

The former is hairy, with a yellowish-grey tip to its

abdomen and a yellow band across its thorax and
fore-part of its abdomen; the latter is a big black hairy
insect with a red-tipped abdomen; the males are dis-
tinguished by a yellow band just behind the head.
The nesting habits of the two species are practically
identical. In early spring a hibernating female becomes
active, and seeks a nesting-place. Usually a deserted
mouse-hole or some hollow in the ground is selected.
Moss is then gathered and stored in the hole, and under
this moss a cell is placed, formed of wax externally
and honey-saturated pollen internally; several eggs are
deposited in the cell before it is closed. Other cells
containing more eggs are added at intervals. Then
the larvae in the first-formed cell hatch; the mother
punctures the cap of the cell, and feeds them with
regurgitated food. Later the larvae spin silken cocoons
within their cells, and emerge at irregular intervals.
The first of the new colony to appear are always smal]
females, known as " workers."" The " queen '" now
becomes littlemore than an egg-laying machine; she
rarely leaves her nest, and often loses the power of
flight. The workers build more and more cells, which
the *' queen "' supplies with eggs; there is no food-store
in these later cells, the larvae being fed solely by the
workers. Stores of pollen and honey are laid up,
252 INSECT LIFE
however, in the discarded cells which the earlier members
of the community have vacated. Some of the later
females are fertile and capable of laying eggs, whilst
towards the end of the summer the " drones
''
or males
appear, and mate with the females destined to hibernate
through the winter and become the future queens.
Some of these underground nests contain as many
as four hundred individuals, poor architects all, but
very industrious workers, being on the wing at three
o'clock or so in the morning. It is stated, and the
statement has frequently been confirmed, that each nest
harbours a trumpeter whose duty it is to arouse the
inmates when the hour arrives for their day's work to
commence.
Of the ground-nesters there are also two very common
species, theMoss-Carding Bee, B. agrorum, and its near
relative B. venustus, also a Carder. The former may
be recognized by its tawny thorax and black abdomen,
and the latter is The cells are placed
wholly tawny.
and after they are constructed
in a hollow in the ground,
the mother Bee drags moss to the site, shreds it with
her mandibles, and scatters it over her cells, till they
are covered, with her hind-legs.
Bombi have their " cuckoos " like many other Bees;
they belong to the genus Psithyrus, and, except for their
larger size, very closely resemble their hosts. They
collect no pollen or honey —
in fact, they are not adapted
for so doing.They are, however, not quite such arrant
rogues as some of the " cuckoos," for they actually
construct their own cells alongside those of their hosts,
but they leave the duty of rearing their young to the
worker Bombi. Towards the end of the season these
 WASPS 253
" cuckoos " remain within tlie host nest and
assiduously
devour the stored honey. However similar host and
" cuckoos " may be in all other respects, there is one
infallible method of determining which is which. All
species of Bomhiis
have clear, unclouded wings; all
Psithyrus species have smoky wings—the latter, more-
over, have no pollen-collecting apparatus.
The nests of these surface Bees have far fewer inmates
than the subterranean species. From a hundred to a
hundred and fifty is a fair average—in fact, the latter
figure is above the average.

Division 2. diploptera, or Wasps.

The Diploptera are so named from the habit of its
members of folding their front wings longitudinally
when at rest. The division is split up into two families,
the Eumenidce and the Vespidce ; the former are Solitary,
the latter Social.
EuMENiD^ .—Tarsal claws toothed; outer face of
mandibles longitudinally furrowed.
In Britain there are sixteen species of this family,
one belonging to the genus Eumenes and fifteen to the
genus Odynerus.
Eumenes coarctata is a long-waisted, yellow and black
insect. It builds its globular mud nests on the twigs
of some shrub, usually heather, and stores them with
small Lepidopterous larvae. In each nest it lays a single
egg. Internally the mud nest is divided unequally into
two parts; in the larger division theEumenes larva
livesand grows, in the smaller it deposits its excrement
and wasted food material.
Fabre has described the very interesting nesting
 254 INSECT LIFE
liabits of E. fomiformis, which, by the way, except
for the design of the nest, are very similar to those of
Odynerus reniformis. The nest is vase-Hke and made
of earth; in its walls small stones are embedded. The
interior consists of a single chamber, which the mother
Wasp stores with fifteen or sixteen partially paralyzed
Caterpillars. Now, the Eumenes egg and larva are
dehcate, and the wriggling Caterpillars would speedily
bring about their destruction. The Wasp is equal to
the occasion, for it suspends its single egg by a fine
silken thread to the roof of its nest; here egg and larva
are out of harm's way. WTien the larva emerges it
can just reach its living food from its suspended position.
As it grows older, by a marvellous provision of Nature,
the egg-shell unfolds as a kind of ribbon, so that the
larva clinging to it can reach food farther away. By
the time the larva can no longer reach more food from
above, it has grown big and strong enough to descend

amongst the remaining Caterpillars without suffering

any harm.
Odynerus is a genus of insects very similar in appear-
ance, but with very varied nesting habits. For the
most part they seek out holes and crevices already
made. 0. eallosus nests in clay banks; 0. sfinifes has
similar habits, but builds a curved, dow^nwardly pro-
jecting spout at the entrance. Other species favour
door-locks, cotton-reels, disused screw-holes, and the
like, and some nest in plant-stems, lining the interior
with fine sand. Chrysidice are the " cuckoos ''
of
Odynerus.
The Australian genus Ahisfa constructs immense
nests with funnel-shaped entrances.
 WASPS 255

Species of the genus RhyncMum, for the most part,

nest in the pithy stems of plants. Some species,how-
ever, build mud nests after the manner of Eumems,
and R. hrunneum is said to " obliterate hieroglyphic
inscriptions in Egypt by its babit of building mud nests
amongst them/'
VESPiDiE.— Claws not toothed, mandibles not fur-

rowed.
There are eight British species of Vespidw, and they
build three distinct types of nests, or, to be more correct,
they frequent three different situations. Vespa vulgaris,
V. rufa, and V. germanica, nest underground; V. arborea,
V. sylvestris, and 7. norvegica, build suspended aerial
nests, and V. crahro seeks an intermediate site such as
a hollow tree or beneath a thatched roof. Our eighth
species, F. austriaca, is rare.

All the Social Wasps build elaborate though short-

lived nests, and the early building is always carried
out by a single queen. The material for the comb is
all of vegetable origin, which is gathered in the man-

dibles of the nest-builders, made into pulp, and cemented

" Nearly any oak fence
with a secretion of the Wasps.
in the open country bears upon it during the summer-
time hundreds of marks as if it had been lightly scraped
wath the finger-nail; these marks are made by the jaws
of wasps.'* The early " queen "-made cells are of finer
material than those formed later by the workers. The
queen cements a single egg to the upper angle of

each of the early cells, and in about a week the larvae

emerge. As the Wasp cells are open and inverted,

the legless grub keeps some of its hinder segments

within the remains of the egg-shell, so that it may not
256 INSECT LIFE
fall out. In common with allother Wasps, as opposed
to Bees, the larvae are fed upon animal matter in the
shape of Green Flies, etc. As growth takes place the
cells are added to by the queen. When fully fed the
larvae spin a silken cocoon within their shell, and later
the perfect Wasp appears. Her first act is to clean
herself, and then to visit a well-grown larva, from
whose mouth she obtains a drop of liquid food. Her
early duties consist in helping the queen to feed the
other larvae, but in a day or two she becomes a worker,
and sallies forth to hunt for food for the inmates of the
nest, or helps to build more cells and thereby enlarge
her home. Often there are many thousands of inmates
in a Wasp's nest; as many as twelve thousand have
been counted at one time, and during a single summer
one nest may harbour sixty thousand individuals —
" workers,'' " drones," and " queen."
In the nests of our common Wasps there are several
guests. The little Fly, Pegomyia inanis, which lays
its eggs on the comb, is a useful member of the com-
munity. Its larvae devour the Wasp excrement which
always collects below the comb. The larvae of another
Fly, Volucella sp., visit each cell in turn and feed upon
the excrement of the Wasp larvae. The Beetle RMpi-
fhorus 'paradoxus is a parasite. " The larva of this
beetle is believed to leap upon the bodies of worker
wasps when they are gathering woodfibre off the surface
of timber. It is thus carried by the returning insects
into their nest. It now eats its way into a wasp grub
and devours the less important tissues of its host when ;

itbecomes of such a size as to threaten the life of its

unfortunate victim, it passes out through the skin of
 DIGGER WASPS 257

the wasp grub, plugging the wound with the skin which
it itself moults as it issues, and now becomes an ex-
ternal parasite upon the same host. It refrains from
killing the wasp grub till the latter has spun its cocoon.
Eventually the beetle larva completely devours the
wasp grub, and accomplishes its own metamorphosis
within the cocoon provided for it by its prey/'
The genus PoUstes mainly remarkable for the
is

wonderful colour variations exhibited even by different

individuals from the same nest.
Polyhia species build neat little pear or apple-shaped
nests, and suspend them from the branches of trees
or shrubs; each nest is enveloped in Wasp paper, and
has one or two more holes for the going and coming of
the inmates. Some of these nests are ornamented
externally.
Chartergus chartarius makes its Wasp paper so solid
and compact that it has the appearance of stone. Apoica
pallida covers its nest with a specially fine paper skin.

Division 3. Fossores, or Digger Wasps.

All the Fossorial Wasps are carnivorous, all are
solitary, and most ofthem display such remarkable
instinct in their hunting, their nesting, and their provi-
sion for the future, that, by their actions, they have
drawn to themselves a host of observers and enthusiasts
who have made of them a lifelong study. Lest the
budding entomologist, on that account, should decide
to direct his studies in another channel, we can assure
him that much remains to be learned, and no class of
insects will better repay the time that is given to their
study.
33
258 INSECT LIFE
The Fossores are sun-lovers, more so even tlian
Butterflies; dry, sandy districts are the favoured haunts
of most species, but, naturally, their habits vary in —
fact.Sharp places them, according to their habits, in
four groups: Parasitic or semi-parasitic species which
usurp the nests of other insects; the potters builders —
of earthen cells; ground burrowers; and wood-tun-
nellers. All the work of tunnelling, building, or bur-
rowing is carried out by the females; their mates take
but little part in domestic affairs.
—
MuTiLLiDJS. Females wingless and without ocelli;
males winged, ocelli present; tibiae spined; anteuDse
thread-like.
These insects are often called Cow or Solitary Ants.
As is so often the case, both names are inappropriate,

for the Mutillids are not Ants. All of them are clothed
with a vestment of hair, and there is a standard colour
scheme of deep red and black, relieved by white spots
which is common to the females of the majority of
species.
The males are always totally unlike the females; they
are winged, active creatures, whereas the females are
apterous and sluggish —an uncommon event amongst
the Fossores, whose females are usually exceedingly
active.
But little is known of the habits of these insects.
The commonest European species, Mutilla europcea,
appears to frequent the nests of Bumble Bees, especially
those of Bombus agrorum and B. variabilis. It is
probable that the Mutillid larvse are parasitic on the
Bee larvae, and that the females feed upon the store
of honey. The winged males leave the Bombus nests
 DIGGER WASPS 259

immediately they emerge. There are three rare British

species.
Thynnid^. —Females wingless, stout, and thorax
divided into three unequal parts; males winged, slender;
legs spinous.
By some authorities these insects are not separated
from the MutillidcB. Most of them are black in colour
with some yellow markings. Little is known of their
habits, but they are believed to be parasitic on Lepi-
dopterous larvsB. The males are so totally unhke the
females that in many cases they have been described
as different species. The sole British representative of
the family, Methoca ichneumonides is exceedingly rare.
,

—
ScoLiiD^. Antennae stout and short; legs stout with
compressed and swollen femora and heavily spined
tibiae; apical area of wings devoid of nervures.
Many of the Scohas are large, powerful insects;
most
of them and of a black colour relieved with
are hairy
yellow or red spots and bands. For the most part,
males and females are strong on the wing, but there is
a curious Central Asian species, Komarovia vidoriosa^
in which the female has minute wings, useless for flight.
With few exceptions, these insects are parasitic upon
the larvae of Lamellicorn Beetles. Fabre has investi-
gated the habits of Scolia bzfasciata, which oviposits
on Cetoniid larvae, and of S. interrwpta, a parasite of
Melolonthid larvae. These larvae dwell below ground,
and it is necessary for the mother Scolia to burrow in
order to find her prey. Having done so, she paralyzes
it by stinging a particular nerve ganglion on the ventral
surface of the larva. This ganglion controls the body
movements of the victim, and the Scolia never stings
260 INSECT LIFE
till she is able to reach exactly the right spot. Having
rendered her victim inert, she deposits a single egg just
behind the fore-legs. When the parasite larva hatches,
it at once buries its head in the skin of its host and

feeds on the non- vital parts. Host and parasite never

part company till there is nothing left of the former
but an empty skin.
EUs 4:-notata is said to depart from the usual Scoliid
custom by preying upon Spiders, and still more curious
is the story of S. atrata as related by Kirby. This West
Indian insect is black, and its reddish wings are tipped
with violet. " It is in the habit of provisioning its
nest with a large grasshopper. It first digs its nest,
and then goes in search of a grasshopper. Having
partially disabled it with its sting, it mounts on its
back and rides it up to its own grave, where it buries
it. If the grave proves to be too small the wasp drives
the grasshopper away while it enlarges it as much as
is required,and then brings it back to the hole.''
There are but two British Scoliids belonging to the
genus Tiphia —small black insects with red-brown legs,
Saphygid^. —Closely to the ScoUidce antennae
allied ;

as long as the head and thorax and slender; legs slender,

not spined; males and females winged. A family of
which little is known, and that little is open to
doubt.
We have two British species, Sapyga b-functata, with
black males marked with five transverse white spots
on the abdomen; the markings of the females are similar,
but their abdomens are red. S. clavicornis, our second
native species, is black with yellow markings. The
former species is said by Fabre to live in the nests of
 DIGGER WASPS 261

Osmia and to feed upon the stored honey, whilst Smith

it preys upon Caterpillars.
states that
PsAMMOCHARiD^ (till recently known as Pompilidw).
—Pronotum reaches the tegulse laterally ; hind-legs long
eyes elliptic; abdomen oval, attached to the thorax by
a short petiole.
The Pompilids include some of the largest, most
active of the aculeate Hymenoptera. Their long hind-
legs indicate the fact that they are probably fleet of
foot, and this is the case. They may often be observed
running hither and thither over the ground in search
of prey.
Many species of aculeate Hymencptera, although
possessed of stings, are either incapable of piercing the
human skin, or at worst they cause a wound which is
of temporary duration. The larger Pompilids, some of
them three inches in length, are creatures to be dreaded,
and a sting from one of them may have really serious
consequences.
As a family these insects are remarkably uniform in
colouring. Rich black with red legs, and sometimes
anteimse and wings of beautiful iridescent blue and
green sheen, is a general description which applies to
many species, especially of the genus Pepsis.
In Britain we have thirty species, half of which belong
to the genus Pompilus. As a rule, these insects are
diggers, using their large approximated coxae to shovel
the earth from their burrows, a fact which they accom-
plish by coming from their excavations backwards.
Having brought the earth to the surface, it is scattered
far and wide by their long hind-feet. Certain species,
amongst them the British Agenia carbonaria, depart
262 INSECT LIFE
from the usual custom and construct vase-shaped mud
which they store with insect food for their larvae.
cells,

An Australian species, Priocnemis hicolor, appears to

—
be a vegetable-feeder in part, at any rate. This insect
seeks a Cicada in the act of sucking sap from a hole
which it has punctured in a tree. " The Priocnemis
has not the art of making the puncture necessary to
procure sap, so the wasp seizes the Cicada and shakes
it till it leaves its hold and flies away, when the
Priocjiemis takes its place and sips the sap. The wasp
never hurts the Cicada."
With few exceptions, all the PsammocJiaridce prey
upon Spiders, and each species appears to have a special
species of Spider prey. Now, Spiders are by no means
defenceless creatures, and the Wasps often display
considerable ingenuity in their efforts to get the better
of their victims.Certain species of Pepsis prey upon
the enormous Tarantulas, and the battles between
Wasp and Spider do not always terminate in favour of
the former.
According to Latter, these Wasps are in the habit of
training for their encounters. " Frequently two females
—note this is no love-dance, for both are females
may be seen to settle down face to face on a patch of
sand, to move round and round as though searching for
an opportunity to lean over first on one and then on the
other side, and from time to time to lash round with
their wonderfully flexible abdomens, as though delivering
a stab from the venomous sting. In their actual
encounters with spiders it behoves them ever to face
the enemy, for the poison fangs of the spider are situ-
ated at the head end, and it is thus from that quarter
 DIGGER WASPS 263
that danger tlireatens." The females to which reference
is made are of Pompilus viaticus, one of our largest
native species, which, with P. rufipes, is common on
inland sandy ground. By the coast one may find and
observe the habits of another common species, P.
plumheus, whose special prey is the Spider Lycosa picta.
All the PsammocharidcB are characterized by a
wonderful solicitude for progeny they w411 never see
and " an acute memory for localities/' Their actions
" seem to point to an intelligence higher
than mere
adapt their conduct to meet various
instinct; tlie insects
contingencies; they appear to have a definite purpose
in view, and that purpose they achieve in a fashion
which makes it difficult to deny them at least some
glimmering of the reasoning faculty/' Fabre
has
written of these insects, and every entomologist should
read his works. The bearing away by the Wasps of
Spiders heavier than themselves, the battles with their
prey and their overcoming by stealth, the hiding of their
burrows that others may not plunder their stores are
all related as only Fabre can tell them.
—
Sphegid^. Prothorax narrow in front and not
produced backwards to the base of the wings; first and
sometimes part of the second abdominal segments
forming a petiole wings short.
;

This is by far the largest family of Fossores, and is

usually divided into ten subfamilies. In Britain we
have at least ninety species. As with the preceding
family, many of the Sphegids and their doings are
charmingly described by Fabre, and, risking repetition,
we would say again. Read him.
Sphegides.—The Sphegides are, for the most part,
264 INSECT LIFE
parasitic upon Locustidw ; a few of tliem prey upon
Spiders and some upon Caterpillars.
The common habit of the genus Spkex is to construct
a horizontal burrow about three inches in length; this
is continued into a vertical burrow of about the same
length, terminated by an oval chamber. The horizontal
tunnel forms a shelter and resting-place for the insect;
the oval chamber is a nursery for its larva. As soon
as the terminal chamber is completed, an Orthopteron
is caught, paralyzed, and brought therein and an egg

deposited thereon. The chamber is then closed, and

a second, third, and even a fourth, are made and
similarly stocked. Then the insect starts a new burrow,
till it has completed ten such structures; and as its

period of activity extends but a month, it is obvious

that the female Sfhex labours with unceasing energy.
The larvae feed upon the stored Orihoptera and pupate
within the subterranean cell. Their cocoons are in-
teresting in that they consist of three layers, the inner
one being waterproof, to prevent damage to the pupa
from the damp earth.
There are four species of Ammophila, or sand-lovers,
in Britain. They are easily recognized by their elongate
red and black bodies. They are burrowers, but they
do not use their coxae for removing the earth from their
excavations, after the manner of the Pompilids. All
their tunneUing is by their powerful man-
carried out
dibles; the soil is loosened by these organs, and in
them carried to the surface.
Our largest species is Ammophila sahulosa ; its larvae
are nourished upon Caterpillars, two evidently being
the normal supply for one larva. After collecting her
 DIGGER WASPS 265

small store and laying an egg upon one individual, this

species covers the mouth of its burrow and leaves its
progeny to its fate. The equally common A. campestris,
however, does not provide all the larval food at one
time, but returns now and again with fresh suppHes of
Caterpillars for its growing family.
The genus Sceliphron, not unlike the Ammophilas in
form, but distinctively banded with yellow and black,
possess the curious habit of selecting human habitations
for their nesting sites. They build mud cells and store
them with A
South European species, S.
Spiders.
spirifex, selects a spot in an open fireplace; the Austra-
lian S. Icetus attaches its cells to some article of furniture
and decorates them with acacia bark. The Indian
S. madraspatanus which, by the way, feeds its larvse
,

on Caterpillars and not on Spiders, decorates its nest

in a peculiar manner with rays of mud, " exactly
imitating a lump of mud thrown with some force."
Ampulicides.— Closely allied to Sphegides, but all
the species have elongated heads and necks, and the
petiole is articulated with the thorax ventrally.
This is a small but widely distributed subfamily.
Many of the species are of gorgeous metallic green or
blue colour. They have been studied but little; so far
as known, they prey upon BlattidcB.
is
—
Bembecides. ^Very Wasp-like insects, being for the
most part black banded with yellow; their bands are
always broken in the middle line, and this alone, apart
from other more technical characters, at once distin-
guishes them from the Wasps.
—
Most species there are none in Britain ^prey upon —
Diftera. They build their nests in loose soil, and they
34
266 INSECT LIFE
feed their larvae upon Flies wliich they bring to their
nests from time to time. A North American species,
Sphecius speciosus, provisions its nest with a paralyzed
Cicada. As the Cicada is twice the size of its captor,
the latter climbs with its prey to some high elevation
before returning to its nest. With this advantage it is

able to plane downwards to its destination without

undue effort.
Philanthides. —Head wider than thorax; inter-
mediate tibiae apically armed with one spur; anterior
tarsi ciliated.
Wasp-like insects, usually of a black and yellow
colour. The genus Cerceris preys upon Beetles, and is

remarkable for the fact that each Cerceris species preys

only upon a certain family of Beetles. Even though
the victims be of varied form and colour, these Wasps
are never misled as to their prey.
Our common British Cerceris arenaria preys upon
Weevils; another of our native species, 0. lahiata^
appears to select the " Flea " Beetle Haltica tabida ;
whilst C. bupresticida, as may be guessed from its name,
confines its attention to the Buprestidce.
Certain species prey upon Bees of the genus Halictiis,
and Philanthus triangulum is an enemy of the Honey
Bee. After having killed its victim, the Wasp so
kneads the Bee as to force the honey from its honey
sac, and the sweet liquid is greedily imbibed. The
Bee is then carried off to the Philanthus nest, a long,
deep tunnel in the ground, and an egg is deposited
upon its dead body.
—
Mimes IDES. ^Minute insects with petiolate abdomens;
middle tibiae armed with a single spur.
 DIGGER WASPS 267

These are minute insects which make their nests in

hollow stems or in disused galls. Psen concolor preys
upon PsylUdce. Our British Peni'phredon lugnhris bores
into the decayed wood of beech-trees and stores its
nest with Aphidce. Cemonus unicolor takes possession
of an old Cynips gall for its home, or the late dwelling
of the gall-forming Fly Lifara lucens on the stem of
the common reed.
Crabronides. —Large, squarehead; prothorax short;
antennae often thickened at the apex; hind-tibiae
frequently thickened; clypeus hairy.
This is by far the largest subfamily of Sphegidw as
far as Britain is concerned; there are at least thirty
native species.
Wehave mentioned that the hind-tibiae of these
Wasps are frequently thickened; even in the British
Crabros there are many species with curiously formed
legs. Crabro tibialis exhibits swollen tibiae to a re-
markable degree; G. gonager has swollen front tibiae;

and for the rest, the legs of C. cribrarius^ C. peltarius,

G. scutellatiiSj G. clypeatus^ G. inierruptus, G. cetratus,
and G. palmamis, will all repay investigation. The
uses of these extraordinary modifications have never
been explained; but, as they occur only in the males,
they are probably secondary sexual characters.
The Grabros prey upon Flies. G. leucostomus preys
upon the metallic green Ghrysomyia poliia ; G. podagricus
upon Gnats; G. dimidiatus upon Bluebottles. Their
nesting habits vary. G. quadrimaculatus bores a nest
in decayed wood; G. wesmaeli and G. cribrarius burrow
in sandy The adult Wasps imbibe the nectar
soil.

from various flowers, a habit which is shared by species

268 INSECT LIFE
of the genus Oxyhelus. This genus also preys upon
Diftera, and one species at least, 0. uniglumis, forms
an excellent example of " aggressive mimicry/' for it

closely resembles its prey. Dark grey with a white-

spotted abdomen, this Wasp as it basks in the sun might
easilybe mistaken for a House-fly. The female makes
a short burrow in the soil and stocks it with nearly a
score of Fhes, which she catches on the wing after the
manner of a hawk, and amongst which she deposits a
single egg.

Division 4. Formicid^, or Ants.

The most Ants is the mobile
distinctive feature of all
articulationbetween the thorax and the main portion
of the abdomen. Another feature which cannot fail to
strike the student is the extraordinary degree of poly-
morphism which occurs among these insects, but of this
we have spoken elsewhere (p. 30). Some forms are
blind: this is never the case with winged forms; others
have well-developed eyes and ocelli. Their heads are
of variable proportions: in the forms of certain species
they can justly be described as minute; other forms
have heads apparently out of all proportion to their
bodies.
From a bionomical point of view no insects surpass
the Ants in interest. Many of them are long-lived, so
at least they may learn by experience; as a class they
have brought the art of living together in a perfect
social community to a very high state. They possess
one qualification which is not equalled in any human
community: each individual works for the good of its
colony, never for the benefit of self. ** There can,
 ANTS 269

indeed, be little doubt that Ants are really not only

the '
highest ' structurally or mechanically of all insects,
but also the most efficient/' To deal but cursorily
with these remarkably interesting insects would require
a volume larger than " Insect Life." Professor Wheeler
has written an absorbingly interesting book on Ants;
it should be read by those who would learn more of

Ants than we can tell.

—
Camponotides. Constriction of the abdomen with
a single protuberance (node); no true sting; cloacal
opening circular.
This is a large subfamily, and contains some of the
most interesting species. None of them can sting, but
they are able to eject a highly acid fluid to a consider-
able distance, a habit which renders them formidable
propositions for other animals to attack.
By far the largest genus is Cam'ponotus, but it does
not contain any exceptionally interesting species and
no British representatives. C. ligni'perdus is the largest
European species, and the allied American Carpenter
Ant, G. pennsylvanicus whose nests are built in tree-
,

stumps, has been so minutely described by McCook,

in his " Notes on the Architecture and Habits of the
Pennsylvania Carpenter Ant," that readers who are
interested will naturally turn to this account for fuller
information.
Even a superficial study of Formicidce will reveal
wonder upon wonder to the student, and amongst such
extraordinary insects as Ants it is difficult to know
where to award the palm for ingenuity. Assuredly
the Indian Tree Ant, CEco-phylla smaragdina, ranks with
the most ingenious, and its doings were for years doubted
 270 INSECT LIFE
by sober, or shall we say sane, scientists, till eye-wit-
nesses of undoubted integrity testified to the truth of
the earlier reports. In appearance the insect is remark-
able, for it is green — ^the usual Ant colour is brown,
black, or red. As (Ecofhylla lives in trees and nests
amongst the leaves, its green colour is protective. It
is, however, in its nesting habits that this insect is so
extraordinary. Selecting several leaves growing in
proximity to one another, their edges are brought
together and fastened with silk, so that the whole forms
a commodious abode for the Ant colony. These nests,
which were discovered long before anyone had seen
them in the process of construction, gave rise to much
wonderment, for no Ant possessed spinnerets or had the
power of forming silk. At length the mystery was
solved, though the earlier reports were not believed.
Nest-making was carried out by a band of Ants working
together; having found a group of leaves suited to
their purpose, hundreds of workers seized the edges and
—
dragged them together a feat beyond the powers of
a single Ant, or even of a dozen individuals, was accom-
plished, after much labour, by hundreds. Next came
the most astounding part of the whole performance.
When the leaf -edges were drawn together, a second
host of Ants appeared, each bearing a larva in its

mandibles. These Ants used the larvae as shuttles,

applying them, now to one leaf-edge, now to another,
and squeezing them gently the while, so that they might
give forth the silk which, in normal cii'cumstances
would have gone to the making of their cocoons. By
this marvellous means the leaf-edges w^ere bound
together and the new nest completed.
 HONEY ANTS 271

Equally interesting are the American Honey Ants,

Myrmecocystiis melliger and M. hortideorum. These
creatures are provident, and they lay up stores for the
inevitable rainy day. Other Ants do likewise, it is
true, but none in such a curious manner as the Honey
Ants. They live underground, and their nests are
always constructed in the neighbourhood of the she-
oak, a shrub which bears honey-secreting galls. In the
nests a large chamber is constructed, and on its domed
roof many individuals hang, suspended upside down,
all their lives. By night the workers sally forth to
steal the sweet fluid from the she-oak; on their return
to the nest they feed the hungry individuals who have
remained behind, and the surplus is regurgitated and
fed to the individuals suspended from the roof of the
larder. The operation is repeated time and again, till

the honey-storing individuals become distended out of

all proportion —their honey-crops attain the size of a
small cherry. When the outside food-supply fails,

these living honey-pots yield up their stores to their

fellow- Ants, and thus enable the colony to survive
periods of stress. Similar habits have been observed
in a South African Ant of the genus Plagiolepis and in
the Australian MelopJiorus inftatus.
The genus Polyrachis contains species of remarkable
form and habits. In form they are conspicuous in
possessing a number of formidable-looking spines on
various parts of their bodies; in habit they are peculiar
in that they only form small colonies, sometimes as few
as a queen and a dozen workers.
The nests of many species are constructed on or
within leaves. P. argentea, a beautiful Ant covered
272 INSECT LIFE
with silvery pubescence builds a small nest of vegetable
,

material on some broad tropical leaf; P. rastella bides

its nest between two leaves; P. nmyri and P. nidificans
construct minute paper-like nests on leaf-surfaces.
Of the British Campanotides the most interesting are
,

Formica rufa and F. sanguinea. The former, variously

known as the Wood Ant, Hill Ant, and Red Ant, lives
for the most part in pine-woods. It forms a striking
contrast to the genus Polyrachis, for its communities
are formed of innumerable individuals. Its nest con-
sists of a mound of vegetable matter, and frequently
of large proportions. The mound is tunnelled by
numerous galleries, leading to further galleries in the
soil. The Wood Ant is one of the many species partial
to Aphides, who supply it with sweet honey-dew. The
most remarkable fact, however, concerning this insect
is the enormous variety of guests which find a home

in its nest. It has been estimated that any one of no

fewer than fifty distinct kinds of guests may be met
with in theWood Ant's spacious nest.
F. sanguinea, the Blood-Red Slave-making Ant, has
been described as the most sagacious and the most
courageous of all Ants. Whether it deserves these
encomiums is another Although a slave-
matter.
maker, it is by no means dependent upon slaves, and
can well exist without them. Its nests are made in
banks, and harbour vast communities. From time to
time the warriors sally forth and plunder the nests of
F.fusca, F. cunicularia, and Lasius flavus, bearing off
the pupse to its own abode. When the pupae hatch,
the aliens faithfully serve their owners and carry out
most of the duties of the community, for satiguinea is
 ANTS 273
by nature lazy and has little stomach for anything but
fighting and robbing his neighbours.
The most notorious slave-maker, however, is the
Amazon Ant, Polyergus rufescens, a European but non-
British species. This Ant is made for fighting; its
mandibles are designed for gripping its enemies to their
undoing, and so unfitted are they for any other purpose
that their owners cannot even feed themselves. To
their slaves these Ants must look for every particle of
food. F.fusca and its allied race, F.fusca auncularia,
are mainly the individuals whose lot it is to be slaves
of the Amazon Ant.
The most numerous British genus of the Campanotides
isLasius, and the commonest species are L. flavus, the
Yellow Meadow Ant; L. niger, the Black Garden Ant;
and L.fuliginosus, the Jet Black Ant.
The Yellow Meadow Ant and the Black Garden Ant
are subterranean dwellers. They both form under-
ground tunnels and galleries of a complex nature; in
them they have nurseries, larders, and all the other
chambers usual in an Ant community. The Garden
Ant is one of the most assiduous guardians of Aphides,
from which it obtains a sugary fluid known as honey-
dew. Not only does this species frequent the haunts
of Aphides, but it tends the subterranean forms as
carefully as any farmer tends his cows. ''Many
Aphidce exhibit the phenomenon known as alternation
of generations —^that is, there is a winged sexual brood
and a wingless asexual brood and sometimes the former
;

lives in the open air and the latter at the roots of

plants. When, therefore, these ants meet with a
winged Aphis about to lay eggs which will produce a
35
274 INSECT LIFE
subterranean brood, they first clip ber wings to prevent
ber escape, and tben open a way and guide ber
for ber,
down to tbe roots of tbe grass. But wben winged
AphidcB are born in tbeir nests, tbey do not cbp tbeir
wings, but open a way for tbem into tbe air, tbat tbey
may fly to tbe plants on wbicb tbeir young are to feed,
and tbus insure tbe perpetuation of tbe species/' Tbis
statement brings us up against an important point in
Ant economy. Tbougb few species of Ants can be
termed barmful to agriculture in tbemselves, many
species, by tbeir pernicious and wonderfully successful
babits of cultivating Aphides, Coccidce, and otber
noxious insects, are indirectly responsible for consider-
able damage. In no case is tbis better exemplified
tban in tbe Argentine Ant, Iridomyrmex humilis, wbicb
actually constructs sbelters for barmful Scale insects,
to protect tbem from tbe elements, and transports tbem
from plant to plant as tbe needs of tbeir appetites
dictate.
DoLiCHODERiDES. —Similar to Campanotides, but all

species possess a rudimentary sting.

Tbis is a small and little-known subfamily witb but
a single Britisb representative, Tapinoma erraticum.
Tbis insect is carnivorous in its tastes, and, according
to Forel, earns its living by stealtb. It attends tbe
combats of otber Ants, and, after tbe encounter, seizes
tbe corpse of tbe vanquished for a meal. Sbould tbe
need arise for Tapinoma to defend itself it does so by
touching its opponent witb tbe tip of its mobile abdomen
and simultaneously ejecting a noxious fluid.
A European species, Liometopum microcephalum, is
more courageous tban its Britisb relative A minute
 ANTS 275

huge colonies in the disused burrows

insect, it lives in
of wood-loving Beetles,and attacks other Ant colonies
with hosts so countless as to bring about their dis-
comfiture.
Myrmicides. —Constriction of abdomen with two
protuberances (nodes); sting present in most species.
Belonging to this subfamily are various species of the
greatest biological interest: dwellers in the homes of
other Ants, and whose males or females are either
aberrant or unknown. Space forbids the description
of these Ants. We may
mention, however, the British
Formicoxenus nitidnlus, which occurs in the nests of
Formica rufa ; and Anergates atratulus, a guest of
Tetramorium ccespitum. For details of these species the
reader is referred to Wheeler's " Ants."'
Our commonest British species of the Myrmicides are
the nativeMyrmica rubra and the introduced Mono-
morium pharaonis Neither of them is of particular
interest,but the latter is a household insect which
sometimes swarms in hordes upon human food, especially
sugary food.
Among the most interesting of the subfamily are the
Harvesting Ants, Aflicenogaster structor and A. barbarus,
of Southern Europe; A. arenarius of Northern Africa,
and Pogonomyrmex barbatus of North America. These
Ants possess the uncommon habit of storing their nests
with seeds of various kinds, and the last-named species
removes the husks from the seeds and stores them on
a special heap outside the nest, a proceeding that has
given rise to the erroneous report that these Ants plant
gardens outside their nests. Some seeds are probably
dropped by the Ants, some are carried out with the
276 INSECT LIFE
husks, but tliat there is any attempt to sow the seeds
has never been shown —in fact, all the efforts of these
Ants are designed to prevent the sprouting of the seed
taken into their nests; this they do by biting ofi the
young roots as soon as they appear.
Cremastogaster is a curious genus in that the insects
can invert their abdomens over their heads, and thus
assume an attitude more fearsome than dangerous, for
they possess feeble stings.
The genus Atta contains the most injurious and some
of the most remarkable species of a remarkable family.
They are known as Leaf -Cutting or as I'ungus Ants.
For the most part they are tropical insects, of large
size, dwelling in enormous colonies. They build sub-
terranean nests, and sally forth to do damage to the
neighbouring vegetation. This they do so effectively
that in some parts of the world all idea of cultivation
has been abandoned. Climbing the trees in their
thousands, the workers cut pieces of leaf about the size
of a threepenny-piece and return with them to their
nests. After a raid of this description, many trees in
the neighbourhood of an Atta colony are defoliated.
The leaves, when removed to the nests, are cut up,
rolled into balls, and form the medium on which a
fungus, Rozites gongylo'phora ,
grows. This fungus is

most carefully tended, and forms the food of the colony;

the spores from which the growth arises are brought
to the nest, in the first place, by the queen-mother.
The story of the Fungus-Growing Ants forms one of the
romances of entomology.
Psevdomyrma hicolor^ a South American Ant of
attenuated form, has a curious habitat. It dwells in
 ANTS 277

the thorns of the buirs-horn acacia, which it enters by

boring a neat round hole near the base. Its food is
supphed by the plant in the form of honey secreted by
glands on the leaves. In return for its food and lodging
this Ant, which is armed with a formidable sting, drives
away Attas and other insects with designs on the leaves
of the acacia.
PoNERiDES. —Constriction of abdomen with one pro-
tuberance (node); abdomen elongated; well-developed
sting.
This is a large subfamily of which we possess but
little reliable information. It includes the Australian
Bull-Dog Ants, Myrmecia, armed with well-developed,
powerful mandibles, and with stings capable of in-
flicting serious wounds.
The two British species, Ponera contracta and P.
punctatissima are of but
, little interest.

DoRYLiDES. —Constriction of the abdomen imperfect;

abdomen elongate and cylindrical antennae inserted near
;

the front margin of the head.

These Ants are remarkable for the great differences
in form between the females and the workers, and for
the non- Ant-like appearance of the males. Another
striking feature of the Dorylides is that they are nomadic
they build no permanent nests, but wander from place
to place, a habit the more extraordinary when we learn
that the females and workers are blind.
Of these Ants, the genus Echiton is confined to the
New World, the genus Dorylus to the Old. There is,
needless to say, considerable confusion with regard to
the systematic position of many members of the
Dorylides. As Sharp remarks, fifty or sixty years of
 278 INSECT LIFE
research has only produced as many females as may
be counted on the fingers of one hand.
So known, the Driver Ants all have similar
far as is
habits, wanderingfrom place to place in search of food,
and finding temporary shelter in hollow trees or the
nests of other Ants. According to Belt, ** They make
their temporary habitations in hollow trees and some-
times underneath large fallen trunks that offer suitable
hollows. A nest that I came across in the latter situa-
tion was open at one side. The ants were clustered
together in a dense mass, like a great swarm of bees,
hanging from the roof, but reaching to the ground below.
Their innumerable long legs looked like brown threads
binding together the mass, which must have been at
least a cubicyard in bulk, and contained hundreds of
thousands of individuals, although many columns were
outside, some bringing in the pupse of ants, others the
legs and dissected bodies of various insects. I was sur-
prised to see in this living nest tubular passages leading
down to the centre of the mass, kept open, just as if it

had been formed of inorganic materials. Down these

holes the ants who were bringing in booty passed
with their prey. I thrust a long stick down to the
centre of the cluster,and brought out clinging to it

many ants holding larvse and pupae."'

 FLEAS 279

CHAPTER VIII

SIPHONAPTERA AND DIPTERA

ORDER SIPHONAPTERA, OR FLEAS.
PuLiciD^. —Wingless insects, laterally compressed. The
separation of head from body not conspicuous. An-
tennae short and thick in depressions behind and above
the eyes; metamorphosis complete.
By some authorities these too familiar, blood-sucking
insects are placed in three famihes

(i.) SarcopsyllidcB—the Chigoes,

(ii.) PulicidcB—true Fleas,
(iii.) Ceratopsyllidce —Bat Fleas.

The general structure of the common Flea is too

well known to need any description. Its hard chitinous
covering is proof against
all but the most severe squeeze;

itspowers of leaping are proverbial. " If man had the

leaping powers of some fleas, they would bound with
ease backwards and forwards over the cross on the
top of St. Paul's Cathedral.'' What is not so well
known is the fact that nearly fifty different species of
Flea are known in Britain.
The Flea peculiar to man is Pulex irritans, but other

Fleas, notably the Cat Flea, Ctenocephalus felis Bouche, ,

and the Dog Flea, C. canis, Curt., are by no means

averse to a meal of human blood.
280 INSECT LIFE
The human Flea lays her eggs, a few at a time, in
the dusty corners of houses, and in a few days the
larvae emerge. They are white and thread-like, and
are furnished on their heads with a thin, knife-edged
plate, which serves as an egg-opener. By rubbing the
cutting edge against the egg-shell, the larvae split the
walls of their temporary prison. The legless larvae
moult several times during their short existence, feeding
the while on decayed organic matter. When fully fed
they spin cocoons, and after the lapse of a few more
days the adult emerges.
Certain Fleas appear to confine themselves to definite
species of hosts, others are more catholic in their tastes.
A study of the distribution of these parasites on their
varied hosts is highly instructive: certain very closely
related animals harbour different Flea species; other
unrelated animals are hosts for the same species of
parasite.
The anatomical structure of Fleas affords most
interesting study.They are beautifully adapted for
crawHng through the furry coats of their hosts. The
combs, toothed structures which occur on the heads of
these insects, are used as additional aids in holding the
host fur, and analogous structures are found on certain
FHes and Beetles.
parasitic
Bat Fleas are blind, so also is the common
All the
Mouse Flea, Leftofsylla muscuU, Duges. In these
blind Fleas a spine often takes the place of the
eye.
The antennae of Fleas are also well adapted to their
mode of life. They fit into grooves at the side of the
insect's head, so that when the Flea is crawling through
 FLEAS 281

closely growing hair its antennse do not impede its

progress.
More truly parasitic tlian our common Flea is the
Chigoe, Dermatophilus penetrans of South America.
The female of this species burrows into the flesh of her
host, a human being or some other mammal, and, being
pregnant, swells to the size of a small pea, causing
considerable pain and inflammation. The hinder parts
of the insect project from the burrow she has made
in her host's flesh, so that her eggs are laid outside
the wound. After oviposition the Chigoe dies and
shrivels up.
The "Plague'' Flea, Xenopsylla cheopis, Eothsch.,
a subtropical species, but not unknown in Britain, and
the common Eat Flea Ceratophyllus fasciatus, Bosc,
are notorious as the carriers of the bacilli of plague from
rats to man. The common human Flea, Pulex irritans,
is also capable of transmitting the malady, but under
natural conditions it is unlikely that it ever does so.
The Bat Fleas all breed in the haunts of their hosts,
and the larvae live upon their excrement. All of
these Fleas are well provided with combs, not only
upon their heads, but upon their abdomens. They
are thus well provided with miniature grapphng irons
to enable them to retain their hold on the active
Bats. None of them are common, and their want
of eyes is not surprising, seeing that their hosts are
nocturnal.

36
282 INSECT LIFE

OEDER DIPTERA, OR FLIES.

The Diftera have two membranous, transparent, non-

scaly wings (except some of the Mosquitoes, whose
wings bear scales). Behind the wings are a pair of
knobbed structures, resembling pins, called poisers,
balancers, or halteres. The halteres are hidden by
membranous shields, called " squamae ,"" and Flies
possessing these structures are said to be calypterate.
Mouth-parts adapted for sucking; metamorphosis com-
plete.
This large order, the largest of all, is very well defined;
there are few other insects, except Diptera or true
FHes, which are two- winged. A celebrated entomolo-
gist has estimated that there are probably three
hundred and thousand species. In addition, Flies
fifty

are undoubtedly the most highly organized of all the

Insecta.
In colouring the true Flies cannot, as a whole, vie
with the Moths and Butterflies, Beetles, or even Bugs;
nevertheless, some of them are of brilliant metallic
sheen and many are pleasing to the eye. In the main
they are inimical to man; it is true that many are
excellent some keep harmful insects in
scavengers,
check, but others transmit some of our deadliest diseases.
Malaria, yellow fever, and sleeping sickness are all
Fly-transmitted diseases. Others, again, are pests of
the farm—the Crane Fly, Frit Fly, Onion Fly, and the
Celery Fly, to wit.
With anatomical structures we are not concerned,
but there are some points which can hardly be lightly
passed over. Practically the whole of the head in these
 FLIES 283

insects is occupied by tlie large compound eyes. In

some species it will be found tbat the eyes of certain
individuals are well separated, in the middle line above
the head; in other individuals the eyes almost touch
one another —the former are the females, the latter
the males. There are, of course, many species in which
the compound eyes show no difference in separation in
the sexes.

Fio. 13.— House Fly.

L, Head and anterior part of thorax (X about fifteen times); At, A,
Spiracle on thorax; F, antennae; Kt, maxillary palpi; R, proboscis;
A, compound eye.

The antennae are important, and much of the classi-

fication of Diftera isfounded upon the structure of
these organs. In some families, the CeciiomyiidcB^ or
Gall Gnats, for example, the antennae are relatively long
and filamentous; in other families of the same group
the antennae of the males only are heavily feathered;
this afEords a ready means of distinguishing the
sexes.
The mouth-parts of Diftera show considerable variety,
and, with the antennae, are important from a systematic
284 INSECT LIFE
point of view. Whetlier designed for piercing, as in tlie

Mosquitoes, or soft and fleshy, as in tlieHouse Fly,

they are all adapted for sucking liquid food. The Bot
Flies provide the inevitable exception, for the majority
of them have mouths so atrophied as to be useless for
imbibing nourishment.
The wings are, probably, more used by systematists
than any other organs in classifying Diptera. The
arrangement of the veins and nervures is very
characteristic in the majority of families, and forms
an infallible guide to the correct position of the
owner.
The larvae of Flies are all legless. Many
them of
possess spines or protuberances, which enable them to
move from place to place to a limited extent. Com-
pared with the larvae of many Moths, or even of some
Beetles, those of Flies are relatively stationary. Some
Dipterous larvae are aquatic, and in such cases they
possess remarkable adaptations for their especial mode
of life. None are more remarkable in this respect than
the so-called " rat-tailed maggots " of the common
Drone Fly, Eristalis tenax, a common denizen of stagnant
water in this country.
Pupae of Diftera are of two kinds —the one very
closely akin to the pupa of Lepidoptera, the other simply
formed of the hardened, shrunken larval skin. The
former is typical of the OrthorrhapJia^ though it also
occurs elsewhere; the latter is confined to the Cyclor-
rhafha.
 FLIES 285

Series 1. Orthorrhapha Nemocera.

Flies witli pupse akin to those of Lepidoptera and
filamentous antennse.
CEcrooMYiro^.— Small, delicate Flies. Long an-
tennae with hirsute whorls; wings usually three-veined,
the hinder vein being forked; no apical spurs on the
tibiae.

The members of this family are known as Gall Flies,

or Gnats, because many of them deposit their eggs in
various organs of living plants, and the larvae which
hatch out of the eggs cause the plant tissues to swell
and become malformed.
The most notorious of these minute insects is the
Hessian Fly, Mayetiola destructor, a very serious pest of
wheat, which, in America, destroys as much as fifty
per cent, of the crop in bad years. This unwelcome
ahen received its popular name because it was thought
to have been introduced into America in the bedding
of Hessian troops during the war of the Kevolution.
The actual damage caused by this pest arises from the
fact that the eggs are placed at the junction of leaf and
stem. The larvae, when they come into the world, eat
the wheat, causing a weak spot, with the result that
the upper part of the stem breaks.
Although the family is large, there is very little
authentic information on the subject of members.
its
The most striking fact about these FHes, apart from
their gall-making propensities, is that certain of the
larvae exhibit the remarkable phenomenon of paedo-
genesis (see p. 20). Another peculiarity is the posses-
sion of a so-called ''
breast-bone " by the larvae of some
286 INSECT LIFE
species. The use of this structure is not quite clear;
it is probably connected witb locomotion.
—
Mycetophilid^. Larger tban the Gall Flies; wings
more veined; no hirsute whorls on antennae; ocelli pres-
ent; and a pair of apical spurs on the apex of each tibia.
From their habit of breeding in decaying fungi
though some species select other putrid vegetable or
—
animal matter these Flies are called Fungus Gnats.
More than a hundred species are known in Britain, and
the little maggots so frequently encountered in mush-
rooms are members of the family.
The Fungus Gnats are more elongated than
larvae of
is usual with Dipterous grubs. Many of them have
particularly interesting habits. The larvae of Sciara
militaris migrate from time to time in enormous numbers
in search of food. " Millions of the larvae accumulate
and form themselves, by the aid of their viscous mucus,
into great strings or ribbons, and then glide along like
serpents; these aggregates are said to be sometimes
forty to a hundred feet long, five or six inches wide,
and an inch in depth."
The New Zealand Glow- Worm is the larva of a
Fungus Gnat, Boletophila luminosa. Not only is the
larva luminous, but the Fly exhibits this peculiarity.
CuLiciD^. —Wings long and slender, veins bear
flattened scales; larvae aquatic.
The Gnats or Mosquitoes are among the most im-
portant of all insects. Most of them are annoying to
man, many are harmful. There are about a dozen
species in Britain. In the popular mind the Mosquito
is a creature more to be feared than the Gnat in —
reality they are one and the same thing.
 MOSQUITOES 287

One of tlie most remarkable facts concerning the

Mosquitoes is revealed by a study of their geographical
distribution. While some species are confined to
limited areas, there are many species of very wide
distribution. The common British Mosquito, Culex
pipiens, L., is equally common in many parts of Asia.
Of the disease-carrying Mosquitoes, the most notorious
are the Yellow Fever Mosquito, Stegomyia fasciata
the Spotted Winged Mosquito, Anopheles maculipennis ;
and other members of the genus; and Culex fatigans.
The Yellow Fever Mosquito, sometimes called the Tiger
Mosquito, on account of its characteristic markings, is,
as its name implies, the carrier of yellow fever. Mos-
quitoes of the genus Anopheles^ recognized from Culex
and Stegomyia by their spotted wings, convey malaria ;

Culex fatigans and probably other species, carry filaria

^

(minute Worms) which cause elephantiasis.

It is a peculiarity of Mosquitoes that they are most
active towards evening; this is exceptional amongst the
Diptera, for most of them are lovers of sunshine. The
habit is not without its advantages, because it has
been proved that it is possible to work and live in a
malaria-stricken area and yet remain perfectly healthy,
provided one retires within Mosquito-proof shelters at
sundown, remaining there till morning. The trans-
mission of disease is carried out by the females only,
for they alone suck blood. In manycases the mouth-
parts of the males are too feeble to puncture the skin.
We have mentioned that the larvae and pupae of
Mosquitoes are aquatic; as a consequence the females
lay their eggs in water, and the various species exhibit
a wide choice of breeding-places. Stegomyia, for in-
288 INSECT LIFE
stance, might almost be termed a domestic insect
The females deposit their eggs in various receptacles
near dwelling-houses; in collections of water at the
bottom of disused cans, in the hollow bottoms of up-
turned bottles —anywhere, in fact, where there is a
little water. There are Mosquitoes which breed in
puddles by the roadside; their eggs are liable to come
to a bad end in dry countries, owing to the evaporation
of the water. Some provision, however, is made
against such an untoward event by the life-cycles of

these species being completed very rapidly. Most of

these insects breed in ponds or fairly extensive sheets

of water, but they usually select some sheltered part
where their eggs are not likely to be disturbed.
The eggs of the various genera exhibit remarkable
differences. species lay their eggs singly, and
Some
they on the surface of the water; the eggs of
float so
other species sink to the bottom of the water. All the
members of the genus Culex lay eggs in large numbers,
and seal them together with their blunt ends, from
which the larvae emerge, downwards. These egg-
masses are known as " rafts." The eggs of Anofheles
are laid singly, but they usually accumulate in clusters.
Each egg is characterized by a pair of lateral floats
containing air.

The larvae are peculiar, almost pin-shaped creatures,

which wriggle actively in the water, and either remain
near the surface or come up constantly to obtain air.

Although aquatic, these larvse cannot obtain the air

they require from the gases dissolved in the water, after
the manner of fish. This fact has been utilized in their
control, and by covering the surface of Mosquito-
 MOSQUITOES 289
frequented ponds with paraffin, millions of the larvae are
killed. Respiration is carried out by means of a tube
situated on the last abdominal segment, and the larvae
constantly thrust the tip of this tube above the surface
of the water to obtain the air they require.
The pupae are comma-shaped creatures bearing a
pair of trumpet-shaped breathing-tubes on the thorax.
When the Mosquitoes are about to emerge, the pupal
skin splits down the back, setting free the perfect insect,
which usually rests awhile on the floating skin it has
just vacated before taking to flight.
CHiKONOMm^.—Small, fragile, Mosquito-like FHes,
without the projecting mouth-parts so characteristic of
the last family.
The Midges are a larger, though less economically
important, family than the Mosquitoes. The females
are persistent blood-suckers, but, so far as is known,

they do not transmit any disease, unless future researches

show certain species of Ceratopogon to be the vectors
of pellagra in the Nile Delta.
The
larvae of this family are not all aquatic; those
of Ceratopogon bipunctatus, for example, live under
moist bark. The larvae of Chironomus, the Harlequin
Fly, of which genus there are more than two hundred
species in Britain, are water-dwellers, but they differ
markedly from Mosquito larvae. Owing to their intense
red colour, due to haemoglobin, they are known as
*'
blood-worms. "" Haemoglobin possesses the property
of absorbing the free oxygen in water and passing it
on to the living individual as required. On this account
the Blood- Worms are able to spend their time in the
mud at the bottom of ponds without the necessity of
37
290 INSECT LIFE
coming to tlie surface to breathe, after the manner of
Mosquito larvae.
The pupae of the aquatic species are comma-shaped,
though not so markedly so as are those of Mosquitoes.
The pupa of the " Splay-Footed '' Midge, Tanypus,
might easily be mistaken for a Culicid; the Harlequin Fly
pupa is easily recognized by possessing a pair of tufts
of white, respiratory filaments, in place of the trumpet-
shaped breathing- tubes common to Mosquitoes. The
Horned Midge, Ceratopogon bicolor, so called because of
the single protuberance which occurs on the hinder
part of the thorax in the perfect insect, has a long,
eel-like larva, measuring about half an inch. Its pupa
isnot curled into a comma shape, though it possesses
the usual pair of trumpet- shaped breathing- tubes.
This is a common British Midge.
—
PsYCHODiD^. Small, fragile Flies, resembling minia
ture Moths Bodies wings and antennae thickly clothed
. , ,

with hair.
These insects are known as Sand Flies or Moth Flies,
on account of their hairy covering; there are about
fifty species in Britain.

Most of the larvae are peculiar in that they are adapted

for life either in water or on land; they have tracheal
gills and spiracles. The larvae of the purely land-
dwellers live in various substances such as dry cow-
dung, rotten potatoes, and the like. The aquatic larvae
either frequent pools or running streams, and the latter
forms are possessed of sucker-like organs by which they
anchor themselves to some support that they may not
be carried away by the current.
There is a South European species, Phlebotomus
 CKANE FLIES 291

fappataci, wliicli of late has earned considerable

notoriety by reason of its carrying to man tbe un-
known germs of a very infectious disease, variously
"
known as " three-day/' " sand-fly/' or " pblebotomus
fever.
D1XID.E. —Flies with three forked veins in the outer
half of each wing, and two cross- veins. Larger than
any of the preceding species.
These Flies are not of any great interest, but they
are mentioned here because they form a natural link
in the chain of familiesbetween the species already
mentioned and those to be mentioned. They occur in
damp, well- wooded spots; the larvae and pupae are
aquatic, and the perfect do not bite. The
insects
immature species might easily be mistaken for those of
an Anopheles Mosquito. There are four British species
of the single genus Dixa which comprises the family.
—
TiPULiD^. The middle of the upper side of the
thorax marked with a distinct V-shaped groove; wing
venation complex. The largest Flies of the Nemocera
are all possessed of exceedingly long legs.
The Crane FKes, or Daddy-long-legs, are well known
to everyone. They claim our attention for several
reasons. The family contains the most primitive forms
of living Diptera ; many species, notably the Chinese

Tifula hrohdignagia, are of considerable size. There

are a great number of forms which, superficially, bear
little resemblance to the typical Crane Fly. Some, in
fact, are wingless. Their habits are as varied as their
forms; one species dwells in deep mines, and many
species can only flourish at low temperatures.
The common Daddy-long-legs, Tipula oleracea, is so
292 INSECT LIFE
well known that a description of it is unnecessary.
One scientist has aptly termed it a silly insect, and
certainly these clumsy creatures appear to fly about
our rooms and gardens without any apparent object.
When handled, they lose their legs as readily as certain
of the long-legged, so-called Harvest Spiders; further-
more, the loss of these limbs seems to cause them but
little inconvenience.
The female lays from two to three hundred eggs, as
she flies vertically over the ground. The larvae bury
themselves in the soil, and feed upon the roots of grasses,
etc., doing a considerable amount of damage. When
fully fed they are repulsive, earth-coloured creatures
about an inch long, and with such tough skins that
they have earned the name ** leather jackets." The
pupae might easily be mistaken for those of some Moth?
were it not for the pair of breathing- tubes which project
from the head like a pair of horns. When the FHes are
about to emerge, the pupae wriggle to the surface of the
soil by means of the backwardly projecting spines with

which they are armed. When their heads are well free
of the soil they stop their efforts to travel fiu-ther, the
pupal case sphts, and the Daddy-long-legs is free.
Though many larval TipuUdce are earth- dwellers,
some are aquatic, and possess remarkable elongated
breathing filaments. An American Bittacomor'pha has
these tailed larvae and pupae, and a British Ptycho'ptera
has equally peculiar pupae.
BiBiONiD^. —Antennae short, thick, and straight;
ocelli present. Front tibiae often swollen or furnished
with a long spine or a circlet of spines. Colours of the
sexes frequently vary.
 BUFFALO GNATS 293

The March Flies (they usually appear in the spring)

are uninteresting, sluggish, hairy creatures. None of
them are good fliers.

Their greatest claim to notice lies in their Caterpillar-

like larvae, with distinct horny heads —^unusual among
the Diptera ; the fact that males and females of the
same species are frequently of different colours —these
colour differences occur all over the world; and in the
peculiar structure of the compound eyes of the males,
consisting of a large, hairy upper portion and a much
smaller, differently faceted lower portion.
SiMULiiD^. —Small, thick- set, hump-backed Flies.
Wings broad; antennse short and of the same width
throughout their length, not hairy.
From their peculiar hump-backed appearance, these
Flies are known as Buffalo Gnats, owing to a supposed
resemblance to the buffalo; they are also called Black
Flies and Sand Flies —an unfortunate name, because
it is also applied to the Moth
Flies. There is only one
genus (Simulium) in the family, and the females of all
the species are persistent blood-suckers. In seasons
favourable to the Flies they appear in enormous num-
bers, and attack domestic animals and even man.
Unlike Mosquitoes, they bite by day; unlike these
insects, also, they live, during their immature stages,
in swiftly running, well-aerated water.
The life-history of a typical Simulium is one of the
most romantic among the Diptera. The females appear
in the spring and haunt swift-running streams in search
of suitable places for egg-laying. Hovering for a
moment above some slightly submerged rock, over
which the water is flowing, the mother Fly will suddenly
294 INSECT LIFE
dart downwards and deposit lier eggs upon tlie rock.
Owing to their jelly-like covering, the eggs adhere to
the spot where they are deposited. The larvae are
curious, somewhat elongated creatures with a sucker
foot at the hinder end, by which they support them-
selves in a vertical position on the rock. On the first
segment there is another sucker-lilce protuberance; on
the head there are a pair of fan- shaped, plumose struc-
tures whose function appears to be to waft food material
towards the mouth. For long periods the larvae do not
move from their original positions; when, however, they
desire to do so, they progress by a looping movement
similar to that of a Looper Caterpillar, by attaching
themselves to the rock with their forward and hind
suckers alternately. In case of failure to obtain a firm
hold of their support, they would be carried away on the
stream, were not provision made against such an event.
From their mouth they spin a thin but strong life-line,
-^

and attach the free end to the rock; forced, by accident

or alarm, to release their hold of their support, they
remain suspended on the life-line till the danger be
passed, when they haul themselves back again to their
resting-place.
When pupation about to take place, the larva
is

spins a slipper or pouch-shaped nest, either on the rock

or on the submerged leaf of some water-plant. Within
the pouch, its head alone projecting, the pupa dwells
till such time as the Fly is ready to emerge. From the
head of each pupa there project a pair of filamentous,
branched gill filaments, which serve for respiration.
As the time for the emergence of the Fly draws near,
a tiny bubble of air collects within the pupal pouch.
 BUFFALO GRATS 295

In this bubble the Simulium leaves its pupal skin,

shakes the bubble free, and, within it, rises to the
surface of the water without wetting its wings.
The SimuUdcB are widely distributed, being practically
cosmopolitan. The commonest British species are
Simulium elegans and S. sericeum. In this country they
never appear in such enormous numbers as in warmer
climates. Obnoxious as the Buffalo Gnats are to
cattle, they are also more than suspected of trans-
mitting pellagra from man to man. This disease,
common in Italy and spreading in America, is not by
any means unknown in Britain.

Series 2. Orthorrhapha Brachycera.

Flies with pupse akin to those of Lepidoptera, and
antennae usually composed of one, two, or three seg-
ments, with a terminal appendage.
—
Stratiomyid^. Antennae three-jointed, often with
an arista tarsi with small terminal appendages scutel-
; ;

lum frequently spined.

The members of this family are so variable that it is

difficult to find a simple, non- technical description

which will apply to all. The name Stratiomys means
'*
Armed Fly," so called on account of the pair of spines
on the scutellum. All the species, however, do not
possess these spines. In America they are called
Soldier Flies, because of the bright colouring of some
species.
The most extraordinary species are those whose
larvae live in the hot springs of Wyoming. So hot is
the water in these springs that the discoverer of the
296 INSECT LIFE
larvae was unable to keep his hands immersed. Tlie
larvae of many species are truly aquatic, but those of
other species frequent the soil, moss, decaying wood, and
Ants' nests; all of them appear to prefer damp places.
Of the thousand odd species in the world, more than
fiftyoccur in Britain; of these, the commonest is the
Chameleon Fly, Stratiomys chameleon.
The Chameleon Fly is a Bee-like creature, black with
yellow markings. The female lays her eggs in clusters
on the under- sides of water-plantain leaves, at a point
above the water-level. As soon as the larvae emerge,
they make their way into the water. They are elon-
gated creatures, and their tails terminate in a circlet
of hairs; in the centre of the circlet the spiracles are
situated. The larvae float head downwards in the
water, with their tails supported on the surface by the
hairs. When alarmed, they wriggle downwards, retain-
ing a bubble of air in their caudal appendages. Pupa-
tion takes place either in or out of the water. In the
former case the pupa floats on the surface, encased in
the last larval skin.
LEPTiDiE. —Antennae three-jointed and terminated by
a bristle; squamae small or rudimentary; at least one
pair of tibiae furnished with distinct spurs at the apex
of the inner side.
Known as Snipe Flies, the Leptidce bear a close
resemblance to the Robber Flies. They are of sluggish
habit when adult, and the predaceous larvae live in
water, earth, or decaying wood, according to the species.
About a score of species are known in Britain, the
most frequently encountered being Leptis scolopacea.
The larvae of Vermileo degeeri, a common European
 GAD FLIES 297

species, construct pitfalls after the manner of Ant- Lion

larvae (see p. 130). Another British species of curious
habit is Atherix ibis. A female will deposit her eggs
on the tip of some branch overhanging a pond, and,
having done so, will cling to the egg- mass and die.
Other females of the species do likewise, till, in time,
a bunch of considerable dimensions is formed of dead
Flies and their eggs. Eventually the mass falls into
the water, the eggs hatch, and the larvae are set free.
Tabanid^. —Antennae four-jointed, the second very
small, the third annulated; squamae very large; tibiae
with terminal spurs on at least one pair.
With the exception of the Muscidce and GulicidcB,
the Horse Flies, Gad Flies, Breeze Fhes, Cleggs, and
Deer Tahanidw are variously termed, are
Flies, as the
by far the most important family of Diptera. They
are powerful fliers, and the females are so bloodthirsty
and so well armed for the purpose that, in the larger
species at any rate, they are capable of inflicting serious
wounds.
The larvae of all the species are predaceous, feeding
upon soft-bodied insects and worms. They are charac-
terized by their cylindrical shape, pointed at either
end, and surrounded with prominent rings. Some are
aquatic, but the land-dwelling species appear to favour
damp places. The adult Flies also frequent the neigh-
bourhood of water, not only for breeding purposes, but
because they are great water-drinkers.
Our largest British species, Tabanus hovinus, is a
formidable-looking nearly black Fly, with the ventral
surface of its abdomen of a reddish hue; well-grown
specimens are fully an inch in length.
38
298 INSECT LIFE
The genus Hcematopota contains several British
species, all of them bloodthirsty creatures which do not
hesitate to bite man.
All the species of Chrysops are beautifully marked,
usually yellow and black Flies, about the size of the
common House Fly. Their beauty is enhanced by the
brilliancy of their eyes while they are alive. They are
no less bloodthirsty than other members of the family.
The Tahanidce are well represented in Britain, seeing
that we have five genera and nearly a score of species.
The most remarkable genus is Pangonia, widely
distributed, though not known in Britain. The males
live upon nectar, but the females of several species have
long, needle-like proboscides, about four times the length
of the insect's body, and capable of piercing clothing.
These and other Tahanidce are the prey of Bembex.
—
ScENOPiNiD^. Small, non-hairy Flies. Antennae
three-jointed, without any terminal appendage; the
third joint longer than the others.
The Window Flies form one of the smallest famihes
and little appears to be known about them.
of Di'ptera,
Our common Window Fly, Scenopinus fenestralis L., is ,

a metallic-black insect, frequently found on windows,

name indicates. Its larvae are predaceous
as its specific
and under carpets and in dusty places; they are
live
supposed to prey upon the larvae of Carpet Moths,
though proof of this assertion is still wanting.
BoMBYLiiD^. —Bodies fringed with or clothed with
hair; wings usually mottled or banded; antennae three-
jointed.
The Bee Flies cannot very well be mistaken for any
other Diptera on account of their characteristic hirsute
 PLATE LXXIir

^f

A GROUP OF DIPTF.RA
Xos.2. fi, 8 and U are Robber flics;No. -1, Pai>!/ni,ia ^p. No. 5, the larpe
; British Gadfly ; No. 7,
Male Stalk-eyed fly No 1(1, Femrde of the same species Xos. 9 an J
; ; U', IJritisli Bee flies.
 BEE FLIES 299

covering. Though the family is large, but few species

are found in Britain, Bombylius major being the most
remarkable in appearance and in habit. Though
possessed of formidable-looking mouth-parts, none of
the species are blood-suckers.
In the main, the Bee Flies are beneficial. Several
species are known some
to devour the eggs of Locusts,
species are parasiticupon Bees. Fabre described the
relationship between the Bombylid Argyromoeba tri-
fasciata and the Mason Bee Chalicodoma muraria. The
female Fly deposits an egg on the structure built up
by the Mason Bee as a home for its family. From the
Dipterous egg a minute, worm-like larva emerges. For
more than a fortnight this larva remains quite motion-
less, then begins the hunt to find a crack in the masonry

through which to gain admittance to the interior. At

length a way is found, usually at the time when the
Bee grub is almost ready to pupate. When once inside
the Bee's home, the Fly larva casts its skin and appears
in a new form, well fitted for the object it has in view —
namely, to feed upon the Bee pupa without killing it.

The mouth of trifasciata is merely a sucker, which is

applied to the soft skin of the Hymenopterous pupa.

At the end of a fortnight the pupa is sucked dry and
the larva is fully fed. To be replete yet incapable of
escape from confinement is hardly an enviable position,
yet the larva is in such case. Patience is second nature
with the larva. It displayed marvellous patience in its

attempts to penetrate the Bee-made masonry; it dis-

plays equal patience in this second emergency, waiting
in a quiescent larval state till the following spring,
when it again moults and appears as a pupa well fitted
300 INSECT LIFE
for its task. Its large head is armed with six formidable
spines, its tail is provided with horns, and its body is
clothed with backwardly directed bristles. The horns
and bristles prevent the creature slipping backwards
during its efforts to escape. Curving itself into a
C-shape, it suddenly unbends and strikes its head
against its prison walls. Eventually the wall is broken
down, the pupa wriggles about till it fills the cavity
which has been formed by its own exertions, the pupal
skin bursts, and the Fly escapes.
—
AsiLiDuE. ^Flies with large, hard beaks tipped with
stiff bristles. Feet and claws large; squamae absent;
strongly built and hairy; antennae three-jointed, with
a terminal appendage.
This is one of the largest Dipterous families, containing
more than three thousand species. Though the species
assume varied forms, from short, stumpy, very hairy
Flies to long, delicate, almost Midge-like individuals,
there is a family likeness which cannot be mistaken.
The AsilidcB are known, and rightly so, as Kobber
Flies. An American entomologist says: *'
These flies

are inhuman murderers. They are savages of the

insect world, putting their captives to death with
merciless cruelty. Their large eyes, divided into such
a multitude of facets, probably give them the most
acute and accurate vision for espying and seizing their
prey; and their long, stout legs, their bearded and bristly
head, their whole aspect, indicates them to be of a
predatory and ferocious character. Like the hawk,
they swoop upon their prey, and grasping it securely
between their fore-feet, they violently bear it away."
The Robber FHes are all exceedingly voracious; their
 KOBBER FLIES 301

prey is captured on tlie wing, and immediately tlie

lancet-like mouth-parts are plunged into the body of
the victim and held in place by the stiff bristles which
clothe the tip of the beak. Their prey consists of Flies,
including those of their own species. Bees, Wasps,
Beetles, Moths, Butterflies, Grasshoppers, and even
powerful Dragon-flies.
A striking peculiarity about many of these Flies is
that they frequently closely mimic the insects upon
which they prey. One Bee-hunting species even goes
so far as to have its hind-tibise so modified that they
Besemble the pollen-carrying hind-legs of Bees. This
aggressive mimicry, as it is sometimes called, is of great
service to the Robber Flies; it enables them to fly
amongst their victims without arousing suspicion, and
their prey is thus the more easily captured. Although
the adult Asilidce are totally unlike the adult Tahanidce,
and the two families are but distantly related, their
larvae are so similar that it is almost impossible to say
definitely to which family they belong.
Empid^. —Flies with small globular heads; antennse
three-jointed, the third joint being long and pointed;
legs long and often hairy.
A large family of unimportant, uninteresting creatures,
called Dance Flies, on account of their curious jerky
flight. There are at least two hundred species in
Britain,and they usually frequent well-wooded districts.
The males of certain species possess the curious habit
of carrying webs of some sticky substance during their
dancing flights; the precise use to which these webs are
put has never been ascertained. It has been suggested
that they act as parachutes or aid in the capture of
302 INSECT LIFE
prey. One observer stated that the females, when
selecting a mate, always decided upon the male with
the largest web.

Series 3. Cyclorrhapha Aschiza.

formed of the hardened larval
Flies with pupa-cases
skin and no arched suture over the antennae of the
adults.
PiPUNCULiD^. —Small Flies with globular heads,
covered almost entirely by the two large compound
eyes. Antennae very short, bearing a long, non-
terminal bristle.
For want of a better name, these insects have been
called Big-Eyed Flies. The family is a small one, and
it has not received very much attention from entomolo-
gists. About a dozen species are known in Britain.
The larvae of some species are parasitic on the Homoptera,
that of Pipunculus fuscipes attacking certain Jassidce.
CoNOPiDuE. —Flies with large heads and three-jointed
antennae, placed close together on a slight protuberance.
The family consists of two divisions — (a) Conopince,
with long antennae terminated by a small bristle;

(6) MyopincB, with shorter antennae, the third joint

possessing a non-terminal hair.
The life-histories of the " Thick-Headed " FHes have
not been fully elucidated. It is certain that many of
the ConopincB, and probably also of the Myopince, are
parasitic on Hymenoptera. Exactly how they attack
their hosts does not seem clear. Some observers state
that the Flies deposit their eggs in the bodies of the
larval or pupal Hymenoptera ; others aver that the eggs
are deposited upon the bodies of the adult hosts. One
 PLATE LXXIV

•'
^'^ifc^'^^ ^^Jf^

^ -i^-

BRITISH FLIES
Nos. 1, 2 and
4, Bee flies; Nos. 3 and 10. Blow flies
; No. 5, Robber fly No. 7, Drone fly No. 8,
; ;

Cheilo!>i(i Jpucorum; No. 9, Flesh fly Nos. 11 and 15, Horn flies; No. 12, Housefly; No. 13,
;

Golden-eyed Gadfly; No 11, Green-bottle; No. 16, FJiinma xp. No 17, Horn flv.
;
 HOVER FLIES 303

fact is clear: the parasitic Flies always make their

appearance from the bodies of adult Hymenoptera.
Syrphid^. —Moderately large, usually flat-bodied
Flies. Many of them mimic Bees and Wasps. Short,
three-jointed antennae, with a non-terminal bristle;
squamae never entirely covering the halteres.
The HoVer Flies comprise one of the largest families
of Diptera, and certainly the most important of the
Cyclorrhapha Aschiza. They are as well known as the
common House Fly; it is impossible to go into any
garden or sunny glade on a bright summer day without
observing numbers of these insects hoverio^ hawk-like
above some favoured blossom.
There is no more interesting family of Flies than the
Syrphidw. Some species afford excellent examples of
protective mimicry; at a casual glance these Flies
may resemble Social or Solitary Wasps, Honey-Bees,
Bumble Bees, and the like. One species, closely
resembhng the Honey Bee, is wont to deposit its eggs
in decaying animal matter. Seeing that no Honey Bee
has ever been known to select such a site for its nest,
there is good reason to suppose that this mimicking
Hover Fly is the insect referred to in the Old Testament
story of Samson. While most of the Syrphids are flat-
bodied, yellow-banded Flies, some have elongated
bodies, and some are of a metallic -green colour.
The adult Hover Flies all feed upon pollen; their
larvae are of most diverse habits. Some are aquatic
for example, Eristalis tenax and Myiatropa florea, both
common in Britain; some live in Bees' and Wasps' nests
— of these, Volucella inanis is well known in this country;
some, and they are the useful members of the family,
304 INSECT LIFE
are predaceous upon Green Fly. Nearly every garden
willshow these individuals busy among the Aphids;
Syrphus seleniticus is a species frequently met with.
On the other hand, there are injurious species in the
genus Merodon, the Narcissus Fly, M. equestris, being
responsible for considerable damage to bulbs. Most
anomalous of all, however, are the larvae of the genus
Microdon, which live in Ants' nests, and are so unlike
insect larvae that their appearance has deceived scientists,
and they have been described as molluscs.
The larva of the Drone Fly, E. tenax, is known as the
" rat-tailed " maggot. The Fly, a creature of the sun
and a lover of sweet-scented flowers, lays her eggs on
the surface of liquid manure or of some evil-smelling,
stagnant water. The larvae, when they emerge, crawl
about on the bottom of the liquid, feeding upon the
decaying matter, and keeping in touch with the air by
means of their curious, telescopic tails. The full-grown
larva measures about two-thirds of an inch long its tail ;

can be extended to as much as five inches. At the tip

of the tail is a circlet of bristles, and within the circlet
are the spiracles, in communication with the maggot's
respiratory apparatus. As the creature passes from one
part to another of its liquid home, it contrives to keep
this circlet of hairs always floating on the surface this it ;

does, within limits, by extending its tail as the liquid

becomes deeper, and contracting it when a shallower
place is reached . Pupation usually takes place in the soil

The Hover Flies of the genus Volucella mimic Bees and

Wasps. It was once thought that their larvae preyed
upon Hymenoptera, but observation showed that the
Flies were by no means unwelcome visitors. V inanis
 BOT FLIES 305

mimics tlie common Wasp; its eggs are laid in Wasps*

nests, and its larvae act as scavengers in their strange
home, passing from cell to cell and devouring the
excrement of the immature Wasps. V. homhylans^
another common British Hover Fly, mimics the Bumble
Bee, and its larvae also act as scavengers.
Of what use, if any, the larvae of Microdon are to
Ants has not been ascertained. Observers have stated
that the Ants try to prevent the Flies from laying their
eggs in their nests. It is probable, therefore, that at
least the Ants derive no benefit from the presence of
their dipterous visitors.

Series 4. Cyclorrhapha Schizophora.

Flies with pupa-cases formed of the hardened larval
skin, and having an arched suture over the antennae of
the adults.
By most authorities the series Cyclorrhapha Schizo-
phora is divided into two groups:
(a) CalypteratcB, with the lower squama distinct and
usually projecting beyond the upper.
(6) AcalypteratcB, with the lower squama minute or

wanting and the eyes widely separated in both sexes.

Group CalypteratcB.

(EsTRiD^. —Large, robust flies; antennae very short

and partially hidden in cavities; front of head prominent;
mouth-parts often atrophied.
The Bot Flies, though a small family, are of the
greatest economic importance by reason of the fact
that many of their larvae are parasitic on mammals.
39
306 INSECT LIFE
Much remains to be learned concerning the life-

histories of these extraordinary Flies. One thing only

is certain: the larvae alone are harmful. The adults are
—
not blood-suckers ^in fact, few of them are able to
feed at all, their short lives being devoted to the con-
tinuation of their kind. The larvae feed upon the pus
which is by their hosts, in consequence of the
secreted
irritation set up by the spiny larval skins. Pupation
always takes place outside the body of the host.
Of the ten British species of Bot Flies, the best known
are the Horse Bot Fly, Gastrofhilus equi, the larvae of
which, in common with others of the genus, live in the
alimentary canal of their hosts; the Ox Warble Fly,
Hypoderma bovis and H. lineata, living in the larval
stage, as the generic name implies, beneath the skin
of their host; and the Sheep Nasal Fly, CEstrus ovis ;

the larvae of this genus live in the respiratory passages.

Other interesting, though non-British members of the
family are the Emasculating Bot Fly, an American
species which attacks the scrotum of squirrels, rendering
them and the members of the genus Dermatohia,
sterile;

which are parasitic on man.

The Bot FUes are not easily observed; they spend
much of their time resting; but when bent on egg-
laying they display much activity. The Horse Bot
Fly, for example, with much buzzing, will dart rapidly
at the fore-legs of its chosen host, deposit a single egg
upon a single hair, and fly away. This operation is
repeated till a good complement of eggs has been laid.
Each elongated egg is provided with a little lid at its
free end. The presence of the eggs causes irritation to
the horse, with the natural result that it resorts to
 BOT FLIES 307

licking for relief. The friction of its tongue, aided by-

its saliva, causes the egg-lids to open, and the larvae are
set free. Once within the mouth of their host, they
are well on the way to their appointed resting-place.
They travel to the stomach, develop anchoring hooks,
with which they attach themselves securely to the walls
of that organ. Food they obtain in abundance, food
intended for the nourishment of their host. When the
time arrives for pupation, they release their hold on the
stomach wall, pass to the outside world along with the
horse's excrement,and pupate in the soil.
The Sheep Nasal Fly is even more shy than the
preceding species. It settles but a moment on the
nostrils of some sheep and deposits its eggs, which
hatch almost immediately. So short is the egg-stage
that some authorities are of opinion that this Fly is

viviparous and gives birth to living larvae. Be that as

itmay, the young larvae, by the aid of their spiny coats,
travel upwards to the frontal sinus of their host, where
they feed on copious secretions of pus. No amount of
sneezing on the part of the sheep (sneezing is a common
indication of the presence of these parasites) will dis-
lodge them till they are ready to pupate, then they pass
to the earth.
The Ox Warble Flies deposit their eggs upon the hair
of oxen, in such places as The
they are easily licked.
larvae, when mouth, do not pass into the
in their host's
stomach after the manner of the Horse Bots, but travel
subcutaneously through the tissues till they reach a
spot just below the hide on either side of the backbone.
These larvae are the cause of the well-known warbles,
which are not only harmful to the living oxen, but
308 INSECT LIFE
render the parts around tlie warble unfit for food and
ruin the hide for leather. In North America certain
tribes of Eed Indians are in the habit of squeezing the
larv8B of Bot FHes from the backs of deer and using
them as food.
TACHmrD^. —Squamae large, covering the halteres;
antennal arista bare or, at most, pubescent; upper
surface of the body clothed with bristles.
These Flies do not appear to have any popular name.
By the uninitiated they might easily be mistaken for
House Flies. Their chief claim to notice lies in the fact
that nearly all of them are parasitic upon other insects
—^lepidopterous Caterpillars for the most part. In the
case of the majority of parasites there is a definite
relationship between the parasite and host species;
among the Tachinidce, however, thesame species of
parasite has been observed to parasitize not only
**
insects of several different families, but of two or
even three different orders.'' The usual procedure is for
the female Fly to deposit an egg, or eggs, upon the
back of some unfortunate Caterpillar. Most parasites
will not trouble with a host which has already been
attacked by some other parasite; these Flies, however,
are not so particular. From the portion of the egg in
contact with the host skin the larva emerges, and at
once bores its way into its body, where it lives upon the
fat and lymph, carefully avoiding the vital organs till

the time of pupation arrives, when it leaves the host to

pupate in the ground. Frequently the host Caterpillar
sheds its skin before the parasitic larva has hatched;
in this event the work of the mother Tachina is brought
to naught, and the Caterpillar, unless again attacked,
 FLESH FLIES 309

suffers no harm. Some of these Flies deposit their eggs

upon the living insect food collected by Solitary Wasps
for their larvae. A Japanese Ugimyia sericaricBy
species,
does considerable damage among the Silkworms of that
country by attacking the larvae. Contrary to the
usual Tachinid habit, this species deposits its eggs upon
the leaves which serve as food for the Silkworms. The
larvae probably hatch on the leaves and then attack
their hosts, though some observers state that the eggs
are swallowed by the Silkworms.
In the main, the Tachinidce are beneficial to man,
certainly the two hundred odd British species may be
so classed. Entomologists will, perhaps, not agree with
this assertion, knowing only too well how annoying it
is when an attempt is being made to rear some treasured

larvae to maturity only to be rewarded by the appear-

ance of drab Tachinid Flies.
—
Sarcophagid^. Closely allied to the Tachinidce and
the Muscidce, from which they may be distinguished
by the fact that the arista is feathery at the base and
hair-like at the apex.
Flesh Flies —the name, though generally accepted, is

hardly a good one, for many larvae live upon decaying

vegetable matter and some are parasitic upon other
insects. The most noxious Flesh Fly is the viviparous
Sarcofhila magnifica, a European, though not British,
species which deposits young on the nostrils of
its

mammals, including man. The commonest British

species are S. carnaria, a heavy -bodied grey Fly, rather
larger than a Blowfly, and the similar-sized, bright
metallic blue Cynomyia mortuorum,
" Many of these insects, when food is scarce, eat their
310 INSECT LIFE
own species with eagerness, and it seems probable that
this habit is beneficial to the species. The parent fly-
in such cases usually deposits more eggs than there is

food for, thus ensuring that every portion of the food

will be rapidly consumed, after which the partially
grown larvse complete their development by the aid
of cannibalism. It is thus ensured that the food will
raiseup as many individuals as possible."
—
MusciD^. Closely resemble Tachinidce and Sarco-
phagidoB, but the arista is feathered.
This family contains many
of our conmionest and
most familiar Flies; amongst them may be mentioned
the House Fly, Musca domestica ; the Bluebottles or
Blowflies, CalUphora erythrocephala and C. vomitoria ;
the Greenbottles, Lucilia ccesar ; the Horn Fly, Hcema-
tobia serrata ; and the Stable Fly, Stomoxys calcitrans.
Amongst the important foreign Muscids mention must
be made of the Tse-tse Flies, Glossina spp., and the
Screw- Worm Fly, Chrysomyia macellaria ; the former
genus belongs to Africa, the latter to North America.
Many members of this family are harmful to man
and his belongings. The Glossince transmit the blood
parasites of sleeping sickness to human beings, and of
Nagana to domestic animals. The Stable Fly is the
probable carrier of surra, a disease which attacks camels,
elephants, buffaloes, and dogs; it is probably not
altogether innocent of transmitting human disease.
No fewer than half a dozen maladies are known to be
carried from patient to patient by the House Fly. The
Screw-Worm Fly and the Horn Fly are both serious
cattle pests in America, and the former has been known
to attack man with fatal consequences. The Blue-
 TSE-TSE FLIES 311
bottles cannot, at best, be considered in any other light
than as nuisances. After this indictment it is only
fair to add that, in general, the Muscidce are useful

scavengers, owing to the fact that their larvae live upon

decaying animal and vegetable matter.
As it is our purpose to take a general survey, however
brief, of all the more important members of the
insect
world, we cannot afEord the space to deal with the
various Muscid species as we would wish. Dr. C. G.
Hewitt's excellent little work on House Flies should be
read by all who are interested in this family. It makes
no mention, however, of the most important of all
Muscids, the Tse-tse Flies, for they are not House Flies.
These insects of the genus Glossina have earned their
popular name from the African natives who think that
Tse-tse most nearly approximates to the buzzing of the
Flies.
Sleeping sickness is caused by a blood parasite, known
as Trypanosoma gambiense, and it is introduced into the
human blood by the bites of either Glossina fdlfolis or
G . The latter species also transmits the blood
morsitans.
parasite of Nagana, T. hrucei, to domestic animals.
The GlossincB are mud-coloured creatures which carry
their wings scissor- wise when at rest. They possess the
curious habit, for Muscids, of producing living larvae in
such an advanced stage that they at once change into
pupae.
Anthomyiidje.—Very similar to House Flies, but
with a different wing venation, the fourth longitudinal
vein running straight to the margin, not upturned, as
in MuscidcB ; arista either feathered or bare.
These Flies, which have no popular name, are, for the
312 INSECT LIFE
most part, unattractive. Their habits are so varied
that experience will probably cause the family to be
split up. Certain British species are harmful. Hyle-
myia cefetorum^ the Onion Fly, lays its eggs on the
necks of onions or on the soil near-by, and the larvae at
once pass down into the stems and irretrievably damage
the plants just above the swelling bulbs. The Cabbage
Boot Fly, Aniliomyia brassicw, lays its eggs in close
proximity to Cruciferous plants, and the young larvsB
feed upon the roots, causing the plants to become dis-
coloured, to wilt and die. Another species of Hylemyia,
H. strigosa, is viviparous, whilst two species of AntJio-
myia, A. cana and A. angustifrons, are enemies of
Locusts.

Growp Acalypteratce.
ScATOPHAGiD^.—Slender Flies, yellowish or black in
colour; smooth or hairy.
The Dung Flies are of little general interest. The
Common Yellow Dung Fly of this country is a familiar
object on the excrement of cattle, on which it breeds.
—
Sepsid^. Small, slender, shining black Flies.
The best-known species of the family is the Cheese
Skipper, Piophila casei, L. The female lays her slender
white eggs preferably on the best-quality cheeses. In
a day and a half the larvae emerge. In a week they are
fully fed; their most striking characteristic is that by
bending themselves so that head and tail meet and
then suddenly straightening themselves out, they are
able to leap to a very considerable height.
—
Ortalid^. Wings brown, spotted or banded; bodies
with metallic coloration.
 FRUIT FLIES 313

Many of these beautiful little Flies, during the larval

stage, live in fruit or vegetables, but they probably only
do so after damage has been caused by other insects.
—
Trypetid^e. Beautifully spotted bodies in many
species, and spotted or banded wings.
The Fruit Flies are considerable pests in some parts
of the world, and one species, the Mediterranean Fruit
Fly, Ceratitis capitata, is one of the worst enemies of
the fruit-grower, so much so that stringent regulations
are enforced to prevent its entry into the United States.
DiOPSiD^. —Very broad heads, eyes at the extremi-
ties of stalks.

The Stalk-eyed Flies are amongst the most curious

of all Diptera in appearance, and there their interest
ends. In many species the eyes are set upon very long
stalks, a fact which gives their owners the appearance
of possessing antlers.
OsciNiD^. —Small, stoutly built Flies, often yellowish
in colour.
The most notorious member of this family is the Frit
Fly, Oscinis frit, a serious grain pest, and only too
common in this country. "Various members of the genus
Chlorops damage crops by causing the plants to form galls.
Drosophilid^. —^Mmute and unimportant insects,
known as Lesser Fruit Flies. The adults both feed
upon and oviposit in decaying fruit, and the larvae of
some species, white, eel-like creatures, are frequently
found in vinegar and badly tinned fruit.
—
AGROMYZID.E. Minute dull-coloured Flies. Of little
importance. The larvae of some species damage foliage
leaves by tunnelling between the upper and lower epider-
mis. The larvae of other species prey upon Scale insects.
40
314 INSECT LIFE

Series 6. Pwpiparia.

Flies with heads and bodies depressed, the former

projecting forward and downward; wings present,
rudimentary, or absent; claws large.
HiPPOBOSCiD^. — ^Parasitic Flies upon animals and
birds; they are peculiar in that they produce neither
eggs nor larvae, but pupse, only a single pupa being
produced at a time.
Hifpobosca equina, the British Horse Fly or Forest
Fly, is common on the ponies in the New Forest, though
it is not confined to that district. It is a chestnut-
brown, winged insect, and bears little resemblance to
the commonly accepted typical Fly. Still less Fly-like

is the Wingless Sheep Tick, MelopJiagus ovinus. This

creature, by the way, is not a tick, for ticks are not
even insects. It is truly parasitic and beautifully
adapted for life amongst the wool of its host. The
family has been neglected by scientists, and many
species are probably as yet undiscovered.
—
Braulh)^. Only one species is known in this family,
the minute Braula coeca, parasitic upon Bees.
—
Nycteribiid^. Eare and curious, Spider-like Bat
Flies.
The legs of these wingless Flies are long, their bodies
are small, and their eyes are wanting. " They are
rarely more than one-sixth of an inch in length, but
the long legs, which are frequently banded with jet
black and silvery white, render them quite conspicuous/*
Of one species Sharp says: ** The form is very peculiar^
the insects looking as if the upper were the under
surface."
 CONCLUSION 315

Here our review of the insects of tlie world is ended.

None important orders have been omitted and
of tlie
few of the famiUes; some, we fear, have been dealt
with superficially, but we have tried to be just and
devote the greater space to insects of major importance.
A work of more than twenty volumes has been devoted
to Lepidoptera alone; therefore, to compress all that
one would say into 320 pages is not so easy as it may
appear. For our shortcomings and omissions we crave
pardon; our one hope is that readers who have borne
with us thus far may feel a desire to go into the fields,
to gain access to some representative collections, and
learn, by the only satisfactory means, by personal
observation and study, more of Insect Life.
316 INSECT LIFE

APPENDIX
SOME BOOKS WHICH MAY BE BEAD WITH
ADVANTAGE
It is usual, when one wishes to draw attention to
certain books, to enumerate a formidable list of works,
in alphabetical or chronological order, under the heading
" BibHography,'' and leave one's readers to pick for
themselves. To the experienced entomologist such a
list may appeal; he knows what he is looking for, and
uses the list merely for reference. It is our object to
be helpful and to point the way; at a later stage our
readers will then be able to use a Bibliography to the
best advantage.

General Works.
The student who wishes to gain a thorough insight
into general entomology cannot do better than read
the fifth and sixth volumes of the " Cambridge Natural
History." Its information is, of necessity, more com-
plete, but it is also far more technical than the subject-
matter of " Insect Life." It is a standard work, but
a new edition would be welcomed by every entomologist.
Carpenter's " Life-Story of Insects " is brief, but
excellent.
" Insects," by Harold Bastin, is another book which
 BOOKS TO EEAD 317

may be read with advantage by the most inexperienced

student. It is accurate though popular, and well
illustrated.
The works of M. Fabre, most of which have been
translated into English, are so delightful, so pregnant
with romance, that even those whose interest in insects
issuperficial have read them and will read them.
The " Insect Book,'' by Howard, is a splendid work
as far as it goes. It deals with American types, how-
ever, while Coleoptera and Lepidoftera are missing from
its pages.

Odonata.
" British Dragon-flies," by Lucas, is the best work
for the beginner. Practically all our British species are
figured in colour.

Orthoptera.
So far as we know, there is no work dealing solely
with this order and suitable for any but advanced
students. All the general works we have mentioned
deal with the order.

Rhynchota.
The remarks under the previous heading apply also
to this order.

Lepidoptera.
" British Butterflies," by A. M. Stewart, and " British
Moths," by the same author, will be found especially
useful to readers of " Insect Life," for they contain
318 INSECT LIFE
concise and accurate descriptions of all tlie British
species figured in
'*
Insect Life/' They are excellent
little works. The volumes with similar titles to the
above, by South, are also worthy of perusal.
The " Butterfly Book " and the " Moth Book," both
by Holland, are useful additions to any entomologist's
library, but theymainly deal with American Lepidoptera.
Works without number have been written on the
subject of the Lefidoftera inhabiting practically every
country in the world. Most of them, however, are
profusely illustrated, and, in consequence, expensive.

COLEOPTERA.
The remarks we made concerning the two books on
Lefidofteraby Stewart apply with equal force to
" Common British Beetles," by Hall. He describes
every British Beetle figured in our pages.
Fowler's " Coleoptera of the British Islands " is an
excellent though expensive work.
The order has received almost as much attention as
the Le'pidoptera, and there are innumerable works on
the Coleoptera of various countries, in addition to books
dealing with different famiHes. Water-frequenting species
are described in Miall's " Aquatic Insects."

Hymenoptera.
Wheeler's " Ants " is a splendid work, which every-
one interested in Formicidce should read and re-read.
" British Hymenoptera Aculeata," by Saunders, gives
excellent descriptions of the " stinging " Hymenoptera
of these Islands,
 BOOKS TO READ 319
*'
Humble Bees," by Sladen, may be studied with
advantage.
" Bees and Wasps/' by Latter, is a sound
little book,
dealing with some of the commoner British species.

SlPHONAPTERA.
" The Flea," by Russell, is, so far as
we know, the
only popular account of these interesting insects.

DiPTERA.
Hewitt's " House Flies " is a splendid little book
deahng with the various species likely to be met with
in British households.
Howard's " House Fly " is another good book on the
same subject.
Verrall's " British Flies " is a standard but expensive
work. It cannot be excelled as a work of reference.
" The Harlequin Fly," by Miall and
Hammond, con-
tains a wealth of information, though Hmited in subject.
Diptera, with aquatic larvae, are all described in
Miall's "Aquatic Insects."
" Tse-Tse Flies," by Austen, is excellent and very
well illustrated.

Economic Insects.
A library could be filled with works on harmful
insects.
Doane's " Insects and Disease " is American and
good.
Allcock's " Entomology for Medical Men " is a useful
work.
320 INSECT^LIFE
" Insects and Man," by the author of the present
volume, describes the relationship of insect to man
over a wide field.
Theobald's " Insect Pests of Fruit " gives a concise
account, with photographs, of all our important fruit
pests.
Gillander's " Forest
*'
Entomology treats in a similar
way of forest pests.
 INDEX
The principal references are shown in black numerals.

Ahispa sp., 254 Aleurodcs brassicoc, 125

Ahraxaa grossvlaria'.a, 1G5 cjV/-i, 125

Acalypterataj, 13, 305, 312 Aleurodidie, 19, 55, 104, 125

Acanthosoma grisemn, 106 Alligator, 128
Acentropus sp., 169 Alternation of generation?, 25, 273
Acherontia atropos, 52, 151 Amara aiUica, 184
Achoruies dubius, 59 fulva, 184
nivicola, 59 Amby, 128
Acilius sulcatus, 187 Ammophila campestris, 265
Acridiidse, 8, 91, 94 sabulosa, 264
song of, 95 Amphydasis betularia, 46
Acridotheres dux, 94 Ampulicides, 265
Acronycta psi, 166 Anasa tristis, 107
tridens, 166 Anatis ocellata, 195
Aculeata, 12, 224, 236 .4/iaa; sp., 75
Adder, flying, 65 Andrena argentata, 241
Adephaga, 10, 176, 183, 206 Cuckoos of, 242
Adoxus vitis, 209 /Wt;a, 241
JEpus marinus, 185 ovina, 241, 242
robinii, 185 sp., 221, 240
Mschna cyanea, 75 vicina, 241
grandis, 75 Andrenidse, 241
her OS, 72 Anergates atraiulus, 275
.^chnidse, 8, 74 Anobiidse, 198
Agabus bipustulatus, 187 Anobium jtaniceum, 198
nebulosus, 187 striatum, 198
Agdistes sp., 170 Anomala frischii, 181
Agenia carbonaria, 261 Anopheles maculipennis, 287
Ageronia sp., 141 sp., 291
Aggressive mimicry, 47, 49, 268 Anophthalvms sp., 185
Agrilus angustulv.s, 203 Anoplura, 8, 56, 57, 61, 63
politus, 203 .4nost« erippiis, 144
ruficollis, 203 Anostostoma cmstraliasice, 91
Agrion sp., 66, 73 Ant, 29, 56, 113, 123, 185, 188, 191,
Agrionidas, 8, 73 193, 200, 223, 237, 288, 2^6
Agriotes obscurus, 201 Amazon, 273
Agromyzidse, 13, 313 and Aphis Lion, 37
Agrotis exclamationis, 166 and Coccidse, 35, 37
segetum, 166 and Green fly, 35, 36, 37, 38, 39,
spina, 167 272, 273
Alder fly, 127 and Lacewing, 37
321 41
322 INSECT LIFE
Ant, and Lycsenidfe, 38 Anthomyia cana, 312
and Microdon, 304, 305 Anthomyidffi, 13, 311
and Plant lice, 35, 37 Anthonomus grandis, 46, 216
and Paussidae, 39, 187 pomorum, 217
Argentine, 274 signatus, 216
Black, 273 Anthophila, 12, 236, 237
Garden, 273 Anthophora, Cuckoos of, 245
Bulldog, 277 personaia, 245
Callow, 35 piiipes, 245
Carpenter, 269 sp., 21, 22, 244
Pennsylvania, 269 Anthribidse, 11, 215
castes of, 31 Apantdes fonnosus, 230
colonies of, 31 glomeralus, 230
Cow, 258 Apatura iris, 45, 141, 143
Driver, 278 Aphcenogaster arenarius, 275
eggs of, 34 barbarus, 275
food of, 34 structor, 275
Fungus, 34, 276 Aphidffi, 9, 18, 19, 29, 36, 37, 38, 39,
Garden, 273 55, 56, 104, 123, 130, 133, 195.
guests, 39 230. 233, 267, 272, 273. 274, 304
reason far, 39 enemies of, 124, 133, 233

tolerated, 41 fecundity of, 19, 123

Harvesting, 34, 275 Aphis Lion, 132
Hill, 272 and Ants, 37
Honey, 271 Maple, 36
Leaf-cutting, 276 Woolly Apple, 124
Lion, 18, 130, 297 Aphidius sp., 230
pits of, 131 Aphodius fimetarius, 179
Meadow, 273 fossor, 179
minim workers of, 32 rufipes, 179
nuptial flight of, 31 Aphoruridffi, 8, 59
nurses, 33 Apidffi, 12, 244
parasites of, 42 Apis mdlifica, 250
plasticity of, 33, 39 Apoda (estudo, 158
polymorphism of, 30, 268 Apoica pallida, 257
pupation of, 35 Aporia cratcegi, 148
Queen, 32 Apterygota, 7, 8
Red, 272 Aradidffi, 9, 110
senses of, 34 Araschnia levana, 28
Slave-making, 272, 273 prorsa, 28
Blood-red, 272 Archiapid!B, 239
solitary, 258 Arctia caia, 162
Tree, 269 villica, 162
why, successful, 29 Arctiida;, 10, 162, 168
Wood, 272 Argynnis adippe, 143
worker of, 32, 33 agalaia, 143
Anthidium hdlicosum, 247 euphrosyne, 143
diadema, 247 lathonia, 143
maniculatum, 247 paphia, 143
septendenfatum, 247 sdene, 143
strigatum, 248 Argyromceba trifasciata, 299
Anthomyia anguadfrons, 312 Aromia moschata, 214
brassicoe, 312 Asilidte, 12, 49. 56, 300
 INDEX 323

Asphalia flavicornis, 153 Beetle, Asparagus, 208

Aspidiotus pcrniciosus, 126 Bacon, 196
Atdura formicaria, 40 Black. See Cockroach
Atemeles, 42, 192 205
Blister, 21, 22, 23, 176,
Atherix ibis, 297 Bloody-nosed, 210
egg-laying of, 297 Bombardier, 186, 188
Athous hcemorrhoidalis, 201 Burying, 191
niger, 201 Black, 191
Atropid.-B, 8, 102 Cane-borer, Red-necked, 203
Airopos pulsatoria, 102 Carrion, 191
Atta sp., 276 Roving, 191
AUagenus pelleus, 197 Cellar, 204
Attaphila sp., 41 Churchyard, 204
Atteldbus curculionoides, 2 17 Clock, i79
Click, 201
Balaninus glandiurn, 216 leaping of, 201
nucum, 216 Colorado, 210
Banjnotus obscurus, 217 Dor, 179
Batocera sp., 215 Dumble, 179
Bee, 21, 29, 30, 123, 194, 221, 223, Dung, 179
236, 237 Elm-bark, 218
and Bee-fly, 299 leaf, 114, 211

Bumble, 14, 49, 190, 250 Flea, 211, 266

Earth, 251 Fungus, 194
Stone, 251 growing, 218
Carder, 247, 252 Golden Apple, 209
Carpenter, 245 Goliath, 175
Drone of, 250 Ground, 184, 185
fly and Bees, 299 violet, 185
and Locusts, 299 June Bug, 181
head, 239 Leaf, 174,209,211
Honey, 57, 200, 241, 240, 250 Leather, 196
Humble. See Bumble Bee Luminous, 199, 202
Leaf-cutter, 248 ]\Iimic, 193
238
legs of, Musk, 214
Long-horned, 249 Oil, 22, 170, 205
Mason, 200, 248, 299 fecundity of, 205
mimicry of, by Robber fly, 4?, 301 violet, 205
Moss Carder, 252 Pill, 197
Pointed-tongued, 244 Prionid, 213
pollen gathering of, 238 Rhinoceros, 182
prey of Robber flies, 301 Rose Chafer, 174, 182
Queen, 250, 251 Rove, 192
Short Fork-tongued, 239 Black, 39
Short Pjinted-tongued, 241 Sacred, 179
Social, 222, 239, 250 Saw-toothed Grain, 194
Solitary, 239 Scarab, 179
swarming of, 31 Ssxtou, 191
tongue of, 237 Shield. 211
Wool Carder, 247 Stag, 178, 189, 213
workers of, 250, 251 Small, 178
Beetle, Ambrosia, 218 Tiger, 1S3, 184
and Ants, 39 183
324 INSECT LIFE
Beetle, Tiger, Wood, 183 Brenthidse, egg-laying of, 220
Tortoise, 211, 212 Brophos notha, 167
Turnip Blossom, 193 parthenias, 167
Flea, 211 Brown Drakes, 77
Wasp, 47, 214 Bruchidje, 11, 206
Water, 186 Bruchus chinensis, 206
Margined, 187 lentis, 206
Silver, 189 obteclvs, 260
breathing of, 190 pisi, 206
egg cocoon of, 190 Bryophila pcrla, 168
Weevil. See Weevils Bug, Abe Lincoln, 106
Whirligig, 188 Ants mimicking, 113
BclostomidcG, 9, 116 Assassin, 112
Bemhex sp., 298 Bark, 110
Bembicides, 265 Bed, 57, 105, 112, 113
Beneficial insects, 57 Giant, 112
Bibionida;, 12, 292 stink glands of, 105
Bittacomor'plia sp., 292 Blood-sucking Cone Nose, 112
Blahcrus gigantetis, 86 Cannibal, 112
Black Beetle. See Cockroach Chinch, 108
Blaps mortisvga, 204 Connoption, 128
mucronata, 204 Harlequin Cabbage, 106
Blastopharja sp., 232 Lace, 109
Blaita orientalis, 17, 84 Four-lined Leaf, 114
Blattidse, 8, 83, 265 Mealy, 125, 126
Blissus leticoj'tervs, 108 Pirate, 112
Bloodworm, 289 Squash, 107
Bluebottle, 267 Third Party, 106
Blue Tit, 124 Buprestidas 11, 54, 202, 207, 266
Bogart, 128 Butterfly, 26, 138
Boletophila luminosa, 286 Admiral Red, 141, 142
Bombus agrorum, 14, 252, 258 White, 141, 143
Cuckoos of, 252 Bhie, 146
lapidariufi, 251 Azure, 146
muscorum, 14 Chalkhill, 140
terrestris, 251 Clifden, 146
variabilis, 258 Common, 146
venustus, 14, 252 Large, 146
Bombycida>, 10, 151 Little, 146
Bombyliida;, 12, 298 Long-tailed, 146
Bombylius major, 298 Mazarine, 146
Bombyx castrensis, 159 Silver-studded, 146
neu&tria, 159 Brimstone, 148
qncrcvs, 159 Brown Argus, 147
rubi, 159 Camberwell Beauty, 143
Bostrychida?, 11, 54, 174, 197 Clouded Yellow, 148
Brachinvs crepitans, 186 Pale, 143
Brachonidai, 12, 50, 229 Comma, 142
Brachyporvs sp., 91 Copper, Large, 146
Brassolidffi, 10, 145 Small, 146
Bra-tla cceca, 314 Emperor, Purple, 45, 141, 143
Braulida}, 13, 314 Fritillary, Dark Green, 143
Brenthid.-e, 11, 219 Duke of Burgundy, 144
 INDEX 325
Butterfly, rritillaiy, Glanville, 143 Calligenia lurideola, 163
Greasy, 143 miniata, 163
Heath, 143 Callimenus sp., 91
High Brown, 143 Gallimorpha dominala, 163
Pearl-bordered, 143 Galliphora erythrocephala, 310
Small, 143 vomitoria, 310
Silver-washed, 143 Gallotermes sp., 81
Grayling, 143 Callows, 35
Hairstreak Black, 147 Caloptenus sp., 22
Brown, 147 Galopterygidse, 8, 72, 73
Green, 43, 147 Calopteryx chinensis, 73
Purple, 147 splendens, 73
White Lottcr, 147 virgo, 72
Lsaf, 43, 141, 143 Cahsoma sycophanta, 185
Marsh Ringlet, 145 Calypterataj, 13, 305
Milkweed, 144 Campodeidse, 8, 60
Monarch, 144 Camponotides, 269
Orange Tip, 147 Camponotus ligniperdus, 269
Painted Lady, 142 pennsylvanicus, 269
Peacock, 141, 142 Camptobrochis grandis, 114
prey of Robber fly, 3}1 Cantharides, 205
Queen of Spain, 143 Capnodis sp., 203
Skipper, 149, 150 Caprification, 232
Checkered, 149 Capsidse, 9, 55, 113
Dingy, 149 Carabidse, 10, 56, 184, 187
Grizzled, 150 Carabus arvensis, 185
Large, 149 catenulatus, 185
Lulworth, 149 nemoralis, 185
New Small, 149 violaceus, 185
Pearl, 149 Carnivora, 183
Small, 149 Carpets, 164
Swallow-tail, 52, 143 Carpocapsa Juliana, 171
Tortoiseshcll, 141 pomonella, 171
Large, 142 saliitans, 171
Small, 141 splendana, 171
White Bath, 148 Oarteria lacca, 126
White, Black-veined, 148 Caryoborus sp., 206
Cabbage, 15, 17, 27, 230 Cassida equestris, 212
Green-veined, 27, 148 viridis, 212
Large, 143 Cassididse, 11, 211
small, 148 Castniidae, 10, 150
Wood, 148 Gatadystalemnata, 169
Byrrhidaj, 11, 197 Gatoxantha bicolor, 203
Byrrhus piluia, 197 opulenta, 203
Cecidomyiida;, 12, 20, 282, 285
Caddis fly, 25, 76, 134 Gdaspidia grossa, 213
carnivorous, 137 Gemonus unicolor, 267
Ccenonympha 145
typlion, Gephaloccema sp., 96
Ccelerocephalus palcemon, 149 Cephida?, 12, 55, 227
Calandra granaria, 217 Gephus pygmceus, 227
oryzae, 217 Cerambycidce, 11, 54, 214
OcUigo eurylochus, 145 Geratitis capitata, 313
OalUcliroma sp., 214 GerafophijUus fasciatus, 281
 326 INSECT LIFE
Ceratopogon bicolor, 290 Cicinddidce, 10, 56, 183
bipunc/aius, 289 Ct/ta; glaucata, 158
Ceratopsillidse, 279 Cimex lectularins, 113
Cerceria arenaria, 266 Cimicidse, 9, 57, 113
bnpresticiia, 266 Cistelidse, 11,204
labiata, 266 Classification, 5
Cercopidse, 9, 121, 122 Clavicornia, 177
Ceroplastes ceriferus, 126 Claviger testaceus, 192
Ceto7iia aurata, 182 Clearwings. See Moths
marginata, 182 Clegg, 297
Cetoniidae, 10, 54, 182, 259 Cleonus sulcirostris, 218
ChcBrocampa elpencr, 152 C/ep^es sp., 236
porcdlus, 152 Cleridse, 11,200
Chalcicodoma muraria, 246, 299 Climacia sp., 132
ChalcididcR, 12, 56, 231, 232, 233 Clipper, 128
Charceas graminis, 166 Clythra sp., 40
Charagia sp., 156 quadrifunctata, 208
Chartergus chartarius, 257 Clythridse, 11, 208
Cheimatobia brumata, 165 Clytus arietis, 48
Chermes abietis, 124 sp., 214
Chigoe, 279, 281 Cnethocarnpa processionea, 151
Chironomidse, 12, 77, 289 Coccidse, 9, 55, 56, 58, 104, 105,
CMoroperla sp., 77 125, 273
Chlorops sp., 313 and ants, 37
Chloroscdus tenana, 92 Coccindlabi-puvctala, 105
Choragus slicpphardi, 215 1 -punctata, 195
Chrysididse, 12, 234, 240 10-pM«ctofo, 195
Chrysis ccerulans, 235 Coccinellidffi, 11, 56, 195
bidentala, 235 Coccus cacti, 126
ignita, 235 mannifera, 126
Chrysomela banksii, 210 Cochineal, 58, 126
cerealis, 210 Cockchafer, 180, 181
gattingansis, 210 Cockroach, 17, 18, 83, 112, 113, 230
limbata, 210 American, 84
marginalis, 210 Caelioxys quadri-derttata, 249
rw/a, 210 Coleoptera, 10, 17, 39, 52, 55, 56, 139,
schach, 210 173, 220, 233
staphylea, 210 Colias edusa, 148
Chrysomelidte, 11, 54, 209 hyah, 148
Chrysomyia macdlaria, 310 Collembola, 8, 18, 59
po^fto, 267 Cdletes daviesanns, 241
Chrijsopa vulgaris, 133 succincta, 240
eggs of, 133 Colouring, 42
Chrysopidse, 9, 56, 133 Colours, protective, 42, 44
Chrysops sp., 298 warning, 47
Cicada, 117, 123, 262, 266 Colymbctes fuscus, 187
periodical, 119 Coniopterygida;, 9, 130
septendecim, 119 Conopidao^ 12, 302
song of, lis Conopinse, 302
vocal organs of, 115 Conorhimis sartgiiisitga, 112
CicadidsD, 9, 55, 117 Oonotrachelns nenuphar, 217
Cicindda campestris, 1S3 Coprida), 10, 179, ISO
sylvattca, 183 Copris lunaris, 179
 INDEX 327

Gordulegasier annitlatiis, 74 Ctenocephalus canis, 279

Cordulegasteridae, 8, 74 fdis, 279
Cordulidae, 8, 75 Cuckoo fly,234
Coreidae, 9, 106 Cuckoo of Andrena, 242
Coremia hirtipes, 214 of Anthophora, 245
Corixa femorata, 117 of Bombus, 252
eggs of, 117 of Halictus, 243
geoffroyi, 117 of Megachile, 249
mercenaria, 117 of Osmia, 248
Corixidse, 9, 117 Spit insect, 121, 122
Corydalis cornuta, 128 CuUx sp., 214
Corydia petiverana, 86 fatigana, 287
Coryneies ccer ulcus, 200 pipiens, 287
Cose inoc era hercules, 150 Culicidse, 12,56,286
Oosmosoina, sp., 214 Curculionidae, 11, 54, 216
Cossidse, 10, 53, 156 Cursoria, 83
Cossus ligniperda, 155 Cutworms, 53
Cotton stainers, 55, 108 Cyclorrhapha Aschiza, 13, 302
lesser, 108, 109 sohizophora, 13, 305
Courtship of Swift Moth, 157 Cymatophorida), 10
Crahro cetratus, 267 Cynipidae, 12, 25, 55, 58, 233
dypeatus, 267 Cynips sp., 207
cribrarius, 267 Cynomyia mortuor^im, 309
dimidiatus, 267 Cyphocrania semirubra, 89
gonager, 267 Cyrtophyllum crepitans, 93
interruptus, 267
leucostomus, 267 Daddy-long-legs, 291
palmarius, 267 Danaidae, 10, 144
pdtarius, 267 Dascillidae, 11, 200
podagricus, 267 Dascillua servinus, 201
quadrimaculatus, 267 Dasychira pxidibunda, 161
scutdlatus, 267 rossi, 162
sp., 231 Dasylis sp., 49
weitmoeli, 267 Dasypoda hirtipes, 244
Crabronides, 267 Day fly, 77
Crambus sp., 163 Death watch, 198, 200
Crawlers, 128 Deilephila euphorUce, 151
Creepers, 77 gain, 151
Gremastogaster sp., 276 Deinacrida sp., 91
Cricket, 40, 41, 83, 90, 111 Demoiselle, 72
Field, 90 Dermatobia sp., 306
House, 90 Dermatophilus penetrans, 281
Mole, 90 Dermestes lardarius, 197
singing of, 93 Dermestidffi, 11, 196
Tree, 90, 91 Deromyia annulata, 49
Crioceridce, 11,208,211,212 Devil's Coach-horse, 192
Crioceris asperagi, 208 Darning-needle, 65
merdigera, 208 Diactor bilineatus, 107
Crock, 128 Diapherotnera femorata. 89
Cryptocephalidse, 11, 209 Dicranura vinula, 162
Cryptocephalus sericen.t, 209 Dictyophorus reticulatus, 97
Cryptocerata, 105, 114 Dimorphism, 43, 140
Cryptophagidse, 11, 194 seasonal, 26, 140
 328 INSECT LIFE
Diopsida;, 13, 313 Empidffi, 12
Dioxys cincta, 247 Encyrlus sp., 233
Diploptera, 12, 236, 253 Endopterygota, 7, 0, 127
Diptera, 12, 17, 52, 54, 55, 56, 130, EndromidiB, 10, 159
193, 231, 233, 265, 282 Endromis versicolor, 159
Disease and flies, 55 Entomobryidae, 8, 59
Division of labour, 30 Epeolus variegatus, 241
Dixa sp., 291 Ephemera vxilgata, 77
Dixidfe, 12, 291 Ephenicridae, 8, 77, 79
Dobson, 127, 128 Ephemeroptera, 8, 18, 77
American, 128 Ephestia kuhnidla, 168
Dolichoderides, 274 Epicauta sp., 203
Dolium diabolicnm, 50 viltata, 22, 23
Donacea crassipes, 207 Ephippiitya trigingnttaia, 93
semicwprea, 207 Epilachna sp., 195
Donacidae, 11, 207 Equal wings, 78
Dorcus parallelopipedus, 178 Erastria scitula, 167
Dorylides, 277 Ericerus pela, 126
Dorylus sp., 277 Eriocampoides limacina, 226
Doryophora pwictatissuna, 210 Eristalis tenax, 284, 303, 304
Dragon, 128 Erycinidcr, 10, 144
Dragon fly, 18, 65, 253 Eucera longicornis, 249
capture of prey, 66 Euchelia Jacob CBCB, 163
emergence from pupa, 69 Euchloe cardamines, 147
pairing of, 66 Euglossa sp., 246
migration of, 72 Eumenes coarctata, 253
prey of Robber flies, 301 fraterna, 235
Drepana falcatoria, 158 pojtiiformis, 254
lacertinaria, 157 Eumenidse, 12, 253
Drepanidffi, 10, 157 Eumolpidffi, 11,209
Drosophilidae, 13, 313 Eiimdpus Jidgidus, 209
Dry season forms, 26 Euplecirus comstocHi, 232
Dynastea hercules, 182 Euplexoptera, 8, 18, 98
Dynastidffl, 10, 54, 181, 182 Euproctis chrysorrhcea, 162
Dysdercus sp., 55, 108 Eupterotidae, 10, 151
sulurdlus, 108 Euthrips citri, 103
Dytiscidffi, 10, 186, 188 pyri, 103
Dytiscus marginalis, 187 Evania appendig aster, 230
punctulatus, 187 Evaniidffi, 12, 56, 85, 230
Exopterygota, 7, 8, 61
Earwig, 61, 98
Echinophthirius, sp., 64 Foenus jaculator, 231
E chiton sp., 277 Fannia, canicvlaris, 16
Economic entomology, 51 Fever, Phlebotomus, 291
Egg-laying of Brenthidc-e, 220 Recurrent, 57, 113
Elateridaj, 11, 54, 201 Sandfly, 291
Elater-sanguinclentvs, 201 Three-day, 57, 291
Elephantiasis, 287 Yellow, 56, 282, 287
Elis 4:-notata, 260 Filaria, 287
Embia savignyi, 100 Fire Brat., 61
Embiid«, 8, 100 Firefly, 202
Embioptera, 8, 100 Fishfiy, 127
Emesidse, 112 Flata sp., 43
 INDEX 329
Flatidae, 120 Fly, Horse, 297, 314
Flea, 279 House, 13, 14, 15, 16, 57,
Bat, 279, 280, 281 284, 298, 303, 308, 310,
Cat, 279 311
ChigcE, 279, 281 Lesser, 16
Dog, 279 Hover, 303
Human, 279, 280, 281 March, 293
leaping powers of, 279 May. See Mayfly
280 Moth, 290, 293
Plague, 281 Narcissus, 304
Rat, 281 Onion, 282, 312
structure of, 280 Ox Warble, 306, 307
Turnip, 211 Pangonia, 298
Flipflap, 128 Robber, 49, 296, 300
Fly and disease, 282 mimicking Bees, 49, 301
Armed, 293 prey of, 301
Bat, 314 sand, 290, 293
Bee, 298 Screwworm, 310
and Bees, 299 sexes of, 283
and Locusts, 299 Sheep Bot., 19
Big-eyed, 302 Sheep Nasal. See Sheep bot. fly
Black, 293 tick, 314
Blow, 309, 310 Snipe, 296
Bluebottle, 310 Soldier, 295
Bot., 284, 305 Stable, 310
Emasculating, 30G Stalk-eyed, 313
Horse, 30G Syrphid, 124
Sheep, 305, 307 Thick-headed, 302
Breeze, 297 Tse-tse, 19, 57, 310
Cabbage root, 312 name of, 311
Celery, 282 Typhoid, 14
Chameleon, 296 Window, 298
Cheese, 312 Flying adder, 65
Crane, 282, 291 Forester, 154
Dance, 301 Forficula auricularia, 98
webs of, 301 Forficulidse, 8, 98
Deer, 297 Formica canicularia, 272
Dragon. See Dragonfly fusca, 272, 273
Drone, 284, 304 auricularia, 273
Dung, 312 rufa, 40, 272, 275
Flesh, 19, 309 sanguinea, 272
Forest, 314 Formicidai, 12, 79, 237, 268
Frit, 282, 313 Formicoxemis nitidula, 275
Fruit, 313 Fossores, 12, 237, 257
Lesser, 313 Fringe wings, 102
Mediterranean, 313 Fritillary. See Butterfly
Gad, 297 Frog hoppers, 121
Gall, 283, 285 Fulgoridse, 9, 43, 120
Green. See Greenfly Fungus gnats, 286
Greenbottle, 310
Harlequin, 289 Galeruca tenaceti, 211
Hessian, 285 Galerucdla luteola, 114, 211
Horn, 310 Galerucidee, 11,54,211
42
330 INSECT LIFE
Gall, 5« Gryllotalpa viilgaris, 90
Bedeguar, 234 Gryllus campestris, 90
Currant, 25 domesiictts, 90
fly, 25, 223, 233 Gymnocerata, 105
formation of, 234 Gyrinidse, 11,188
Gnat. See Gall fly Gyrinus natator, 188
Oak-apple, 26 Gyropidse, 8, 81
Root, 26
Spangle, 25 Ha,matobia serrata, 310
Galleria sp., 170 Hainatomyza dephantis, 64
Gastrophilus equi, 306 Ho.matopinus asini, 64
Geometers, 43, 164 Hmmatopota sp., 298
Geometridse, 10, 53, 163 HcEinonia curtisi, 207
Geotrupes spiniger, 180 Hairstreak. See Butterfly
stercorarius, 179 Halictus, Cuckoos of, 243
sylvaticus, ISO lineolatus, 243
G err is sp.. Ill maculatus, 243
Glossina sp., 19, 310 malachurus, 243
morsitans, 311 morio, 243
palpalis, 311 quadricinctus, 243
Glow-worm, 199 sexcinctus, 243
New Zealand, 286 sp. 221, 266
Glyptus, mimic of Termites, 185 Halohates, sp., Ill
sculptUis, 185 Haltica sp., 211
Gnat, 110,267,288 tabida, 266
Buffalo, 293 Halticidffi,11,54, 210
Fungus, 286 Harpalus oeneas, 184
Gall. See Gall fly latus, 184
Water, 110 ruficornis, 184
Gnophria quadra, 163 Harpax ocdlaria, 87
Gnorirrms ndbUis, 182 Heliconiidse, 10, 145
Goggle goy, 128 Hdiconius erato, 145
Golden eye, 133 Hdiopathes gibbus, 204
Gomphida;, 8, 74, 75 Hell devil, 128
Gomphus vastus, 74 diver, 128
Gonepteryx rJiamni, 148 Hellgrammite, 127
Gongylus gongyloides, 50 Hdopdtis, sp., 114
Grasshopper, 92 Hemerobiidffi, 9, 132, 133
Great Green, 92 Hemiptera, 63, 105
Long-horned, 91, 92 Henicocephalida9, 9, 111
prey of Robber flies, 103 Hepialidse, 10, 156
Short-horned, 94 Hepialus humuli, 156
Grayling, 145 Jiectus, 156
Greenbottle, 310 vdleida, 156
Green Drake, 77 Hesperia acicRon, 149
fly, 35, 104, 123, 235, 304 comma, 149
and Ants, 35, 36 lineola, 149
and Ladybirds, 124, 195 sylvanus, 149
enemies of, 124 thaumas, 149
fecundity of, 19, 123 Hesperiidse, 10, 149
siphons of, 37 Hetserina, 73
Growth, 15 Heterocera, 10, 139, 149, 150
Gryllidffi, 8, 90, 95 Heterogyna, 12
 INDEX 331
Heteromcra, 11, 177, n03 Ichncumonida;, 12, 56, 228
Heteroi^tera, 9, iDi, 105 Idclothrips spectrum, 102
Hibernation, 26 Ilybius ater, 187
IHmatidium latreilli, 213 fuliginosus, 187
Ilipfobosca equina, 314 Ino globularius, 154
Hippoboscidae, 13, 57, 314 Insects and disease, 51, 56
Hippodamia 13-2miictata, 195 definition of, 6
HispidcG, 11, 211 Ip-i quadriguttata, 193
Hister himacnlatus, 193 Iridomyrmex humilis, 274
cadaver iims, 193 Ischnomyrmex cockerelli, 33
unicolor, 193 Isoptera, 8, 18, 52, 78
Histeridai, 11, 39, 192 Isosoma, sp,, 231
and ants, 39
Ho Jack, 128 Japygidae, 8, 60
Hololepta sp., 193 Jassidae, 9, 55, 122, 302
Homoptera, Julodis cirrosa, 203
9, 104, 117, 302
Honey dew, 36, 37, 38 Jumping beans, 171
how obtained by ants, 38
June bug, 181
Iloplia philanthus, 181
Kakothrips rohustus, 103
Hornet, 48, 192 Kallima sp., 43, 141, 143
Horse stinger, 65 Katydid, 92
Ilybernia defoliaria, 165 Angular- winged, 93
Hybocampa milha^iscri, 153 Kingfisher, 72
Ilydrocampa nympJieaia, 169 Koniarovia vktoriosa, 259
stagnata, 169
Ilydrocyphon deflexicollis, 201 Labia minor, 99
Ilydrometra stagnorum, 110 Labrus gibbus. 184
Hydrometrid®, 9, 110, 111 Lac insect, 58, 126
Hydrophilidae, 11, 189 Lacewing, 124, 133
Hydrophilus piceus, 189 and Ants, 37, 124
Hydropsychidaj, 9, 137 Lacon murinus, 201
Hydroptilidse, 9, 137 Ladybird, 124, 126, 174, 195
Hylastes ater, 219 and Greenfly, 124, 195
palliatus, 219 and scale insects, 126, 196
Hylatoma rosce, 225 2-spotted, 195
Hylemyia cepetorum, 312 7-spotted, 195
strigosa, 312 10-spotted, 195
Hylohius abietis, 216 13-spotted, 195
Hylurgus piniperda, 219 Lamellicornia, 10, 176, 177, 181, 259
Hymenoptera, 11, 17, 52, 55, 77, 81, parasites of, 259
88, 122, 124, 126, 139, 221, 222, 223, Lamiidfc, 11, 54, 173, 214
302, 303 Lampyrides, 199
Hymenopus bicornis, 50 Lampyris noctiluca, 199
Hypcra punctata, 218 Lasiocampa quercifolia, 159
Hypermetamorphosis, 21, 22 Lasiocampidse, 10, 158
Ilypliydrus ovatus, 187 Lasius flavus, 272, 273
Ilypodenna bovis, 306 fuliginosus, 39, 273
lineata, 306 niger, 273
Ilyponomeuta padella, 172 Leaf insect, 43, 83, 83
Hypsidsc, 10, 162 miner, 53, 55, 172
roller, 53, 171
I eery a purcJiasi, 126, 196 Leaping of Click Beetle, 201
Ichneumon flies, 228 of flea, 279
332 INSECT LIFE
Lecanium olece, 167 Louse, Crab, 64
Lepidocyrlus americanus, 59 Elephant, 64
Lepidoptera, 9, 17, 26, 27, 43, 44, 46, Head, 63
52, 53, 54, 120, 138, 176, 196, 224, Horse, 64
225, 229, 231, 284, 285, 295, 315 Human, 63
Lepisma domestica, 61 Jumping Plant, 104
saccharinum, 61 Seal, 64
Lepismatidae, 8, 61 True, 61, 63
Leprosy, 113 Lucanida, 10, 54, 178, 181, 213
Leptidae, 12, 296 Lucanus cervus, 178
Leptinidse, 11, 190 Lucilia ccesar, 310
Leptinotarsa decemlineala, 210 Lyccena agon, 146
Leptinus testaceus, 190 argiolus, 146
Leptis scolopacea, 296 arion, 146
Leptoceridae, 9, 137 astrarche, 147
Leptoglossus phyllopus, 107 bdlargus, 146
Leptopsylla musculi, 280 bcetica, 146
Lestes sp., 73 corydon, 146
Leto venus, 156 tear us, 146
Leucophasia sinapis, 148 minima, 14
Leucospis gigas, 246 semiargus, 146
sp., 231 Lyoaonidffi, 10, 38, 145
Libellula depressa, 66, 75 and ants, 58
quadrimaculata, 75 Lycus 200
sp.,
Libollulid^, 8, 75 Lygseidse, 9, 107
Limacodidse, 10, 158 Lymantriidfe, 10, 53, 160
Limnetis sibylla, 143
Limnophilidae, 9, 136 3Iach(Brota guUigera, 123
Limnophilus flavicornis, 136 Machilidse, 8, 61
rhomb icus, 136 Machilia maritima, 61
Liometopum microcephalum, 274 Macrodontia sp., 213
LiopMmus nubilis, 217 Macroglossa, fuciformis, 152
Liotheidse, 8, 61 stdlarum, 152
Lipara lucena, 267 Macropathus fUipes, 91
Lithargus bijasciatus, 194 Macropus longimanus, 215
Locust, 22, 83, 91, 200 Maggot, Rat-tailed, 24, 284, 204
and Bee flies, 299 Malacodermidse, 11, 199
life history of, 93, 97 Malaria, 56, 282, 287
migration of, 96 Mallophaga, 8, 18, 61
parasites of, 22, 260 Mallophora sp., 49
Rocky Mountain, 97 Mamcstra brassicw, 166
seventeen year, 18, 81 Manna, 126
song of, 92 Mantidae, 8, 50, 86, 112, 129
Lociista viridissima, 92 Mantis, habits of, 86
Locustida;, 8, 91, 95, 264 parasite of, 88
Lomechusa, 42, 192 praj'ing, 86
Looper, 164 rdigiosa, 86
Lopaphus cocophages, 88 Mantispidse, 9, 129
Lophopteryx camelina, 153 Mayetiola destructor, 285
Lopliyrus pini, 225 Mayfly, 77, 111,235
Louse, Bird, 61 Mealworm, 203, 204
Body, 63 Miastogaster lucretia, 65
Book, 100 Megachile albocincta, 249
 INDEX 333

Megachile, circumcincla, 249 Mosquito, Tiger, 287

Cuckoos of,249 yellow fever, 287
Megastigmus sp., 231 Moth, 26, 138, 150
Melano'plus spretvs, 97 Antler, 51, 166
Mdanotua rufipes, 201 Atlas, 150
Mdecta armata, 245 Bagworm, 154
luctuoad, 245 life history of, 154

Meligethes ceneus, 193 Bee, 53, 170

Meliicea athalia, 143 Black Arches, 161
auricoma, 143 Brindled Beauty, pale, 165
cinxia, 143 brown-tail, 162
if e^cE Proscar abcev 3, 22, 205 Buff Arches, 153
vidaceus, 205 Buff Tip, 153
Meloidffi, 11, 21, 22, 176, 205 Bugong, 1G7
Meldontha vulgaris, 180 Burnet, 154, 163
Melolonthidas 10, 54, 180, 181, 259 6-spotted, 154
Melophagus ovinus, 314 Cabbage, 166
Mdophorus inflatus, 271 Carpet, 298
Membracidse, 9, 121 China Marks, 169
Menopon pallidum, 62 brown, 169
Merodon equesiris, 304 small, 169
Metamorphosis, 15 Chocolate Tip, 153
Metapodi^is femoratus, 107 Cinnabar, 163
Methoca ichneumonides, 259 Clearwing, currant, 154
Miastor sp., 20 Hornet, 48, 154
Microcentrum retinervis, 93 Clothes, 53, 171
Microdon and ants, 304, 305 Codling, 171
Midge, 111, 223 Currant, 165
Horned, 290 Dart, 166
Splay-footed, 290 December, 159
Migration of Dragon flies, 72 Dragon of Old Sepp., 153
of Locusts, 96 Drinker, 158
of Nymphalidte, 142 Early Thorn, 165
of Sciara militaris, 286 Emperor, 150
Mimesides, 266 Ermine, Buff, 163
Mimic battles of Pompilids, 262 small, 172
Mimicry, 47, 141 white, 163
aggressive, 47, 49, 268 Flour, 168
of flowers, 44, 50, 87 Footman, 163
in Reduviida3, 112 4-8potted, 163
protective, 47 Rosy, 163
Minim workers of ants, 32 Forester, 154
Monodontomerus nitidus, 246 Fox, 159
Monohammua sp., 215 Ghost, 156
Monomorium pharaonis, 275 Gipsy, 160, 161, 185
Morphidse, 10, 145 Goat, 155
Morpho sp., 145 Gold Spot, 167
Mosquito, 282, 284, 286, 290 tail, 161, 162

and disease, 287 Gooseberry, 165

eggs of, 287 Grass, 168
common, 287 Hawk, 151
pupae of, 289 Bedstraw, 151
spotted winged, 287 Bee, 152
334 INSECT LIFE
Moth, Hawk, Convolvulus, IGl Moth, Vapourer, life history of, 160
Death's-head, 52, 151 Winter, 165
Elephant, 152 Wood Leopard, 156
Eyed, 152 Woollen, 172
Humming bird, 152 Yellow-horned, 153
Poplar, 152 Yucca, 23, 24
Privet, 44, 151 Moulting, 18
Spurge, 151 Murgantia histrionica, 106
Hart and Dart, 166 Musca domestica, 13, 14, 310
Hoary Grey, 168 Muscidcc, 13, 56, 57, 309, 310, 311
Hook Tip, 157 Mutilla europcea, 258
Pebble, 15S 259
Mutillidse, 12, 258,
Hop dog, 161 Mycetophagidce, 11, 194
Kentish Glory, 159 Mycetophagua qnadripustulatus, 194
Lackey, 159 Mycetophilidce, 12, 286
Ground, 159 Myiatropa florea, 303
Lappet, 159 Myopinee, 302
Lobster, 153 Myrmecocyrtus hortideorum, 271
Magpie, 165 mdliger, 271
Marbled Beauty, 163 Myrinecia sp., 277
Meal, 168 Myrmecophana fallax, 92
Mottled Umber, 165 Myrmecophila sp., 40, 41
Muslin, 163 Mynnedonia funesta, 39, 192
Nun. 160, 161 humeralis, 39, 194
Oak Eggar, 159 Myrmelionidfi', 9, ISO, 132
Miner, 172 Myrmica rubra, 275
Peach blossom, 153 Myrmicides, 275
Peppered, 46
Pine Beauty, 44 Nobis lativentris, 113
Plume, 170 Nagana, 310
prey of Robber flics, 301 Names, popular, 14
Processionary, 29, 151 185 priority of, 14
Prominent, Coxcomb, 153 N anosdla fuivji, 174
Iron, 153 Nasuti, 82
Pebble, 153 Necrobia ruftcollis, 200
Swallow, 153 rufipes, 200
Puss, 152 Necrodes littoralis, 191
Swift, 156 Necrophorus humator, 191
courtship of, 157 mortuorum, 191
gold, 156 ruspator, 191
Northern, 157 vespillo, 191
Tiger, buff, 163 Nematus gallkola, 225
cream spot, 162 rihesii, 225
Garden, 162 salicis, ci ere<c ,225
ruby, 162 ventricosus, 225
scarlet, 163 Nemeobius lucina, 144
Tineid, 23 Nemeophila russula, 163
Tortrix, green, 171 Nepacinerea, 115
Turnip, 166 Nepidffi, 9, 114
Tussock, pale, 161, 162 Nepticiila ruficapitella, 172
Underwing, orange, 167 Nest of Bumble Bee, 251
used as food, 167 of Chalcidoma, 246
Vapourer, 25, 160 of Dasypoda, 244
 INDEX 335
Nest of Eiimenes, 253 Osmia bicoior, cuckoos of, 248
of Loaf-cuttor Bee, 249 leucomelana, 247
of Tree Ant, 270 nesting habits of, 247
Neuroptera, 127 rafa, 247
Neuroterus lenticular is, 25 sp., 246, 247, 261
Nezara sp., 106 tridentata, 247
Nisoniades syrichthus malvcr., 150 Osmylus fulvicephalus, 132
tagos, 150 Otiorrhynchus tenebricosus, 217
Nitidula bipushUata, 193 Oxybelus uniglumis, 49, 268
Nitidulidc-B, 11, 193 Oxycarenus sp., 108, 109
Nits, 63 Oxythyrea stictica, 182
Noctuidae, 10, 53, 153, 165
Nomada lathburiana, 242 Psedogenesis, 20
Notodonta dicta a, 153 Palustra sp., 151
dromedarius, 153 Panchlora sp., 86
ziczac, 153 Pangonia 298
sp.,
Notodontidje, 10, 152, 153 Panolis piniperda, 44
Notonecta glauca, 116 PapUio machaon, 52, 148
Notonectida3, 9, 116, 117 Papilionidse, 10, 148
Novius cardinalis, 120, 196 Papiriidae, 8, 60
Nudaria mundana, 103 Parasites, 21, 57, 61, 62, 113, 222, 231,
Nycterbiidse, 13, 314 232, 233, 235, 236, 246, 256, 259
Nymphalidae, 10, 141, 149 Parasitica, 12, 224, 228
Parasitic fiies, 306, 307, 308, 314
Oak apple, 26 Parasitism, 20
Ocneria dispar, 160, 161 Parthenogenesis, 19
Ocypus olens, 192 Passalidse, 10, 177, 179
Odonata, 8, 18, 55, 56, 65 song of, 178
Odonestis potatoria, 158 Pattern, types of, 48
Odynerus callosus, 254 Paussida}, 11,39,187
parietum, 235 and ants, 39, 1S7
reniformis, 235, 254 Peach scale, 167
spinipes, 235, 254 Pear Slug, 226
(Ecophylla smaragdina, 269 Pedicinus sp., 64
nesting habits of, 270 Pediculidffi, 8, 63
CEstridse, 13, 57, 305 Pediculus capitis, 63
(Estrus ovis, 19, 306, 307 vestimenti, 63
Oligarces, 20 Pegomyia inanis, 256
Oligoneuria rhenana, 78 Pela wax, 58
Onthophagus fracticornis, 179 Pellagra, 295
Orectochilus sp., 189 Pelobiidie, 10, 186
Orgyia antiqv.a, 160 Pdobius tardus, 1S6
Ornithopterasp., 148 Pemphredon luguhris, 207
Ortalidae, 13, 312 PentatomidB3, 9, 55, 105, 107
Orthetruin sp., 75 Pepsi's sp., 113, 261, 262
Orthoptera, 8, 18, 52, 54, 82, 264 Perga lewisii, 226
Orthorrhapha Brachycera, 12, 295 care of young, 227
Nemocera, 12, 234, 285 Pericalliabilunaria, 165
Oryctes naseicornis, 182 Periplaneta americana, 84
rhinoceros, 182 Perla bicaudata, 76
Oscinidse, 13, 813 Perliida;, 8, 76, 79
Oscinus frit.., 313 Petiolata, 12, 224, 225, 223
Osmia bicolor, 247 Petrognatha gigas, 215
336 INSECT LIFE
Phalera curtula, 153 Polls tes sp., 221, 257
bucephala, 153 Pollen baskets, 239
Phasgonuridae, 92 Polybia sp., 257
Phasmidse, 8, 88 Polyergus rufescens, 273
Phenax auricoma, 120 Polygnotus sp., 233
symbiosis of, 120 Polymorpha, 11, 176, 177, 187
Phibalocera pythonicua, 90 Polymorphism, 30, 268
Phigalia pedaria, 165 Polyommatus dispar., 146
PhUcenus spumarius, 122 phlceag, 146
Philanthides, 266 Polyrachis argentea, 271
Philanthus triangulum, 266 mayri, 272
Philopteridge, 8, 62 nidificans, 272
Phlebotomus pappataci, 290 rastella, 272
Phrygania grandis, 136 Pompilidse, 261
Phryganeidse, 9, 136 Pompilus plumbeus, 263
Phthirius inguinalis, 64 rufipes, 263
Phyllaceus integer, 228 viaticus, 263
Phyllium crurifolium, 43, 90 Ponera contractu, 277
Phyllohius calcaratus, 217 punctatissima, 277
Phyllomorpha laciniata, 107 Ponerides, 277
Phyllopertha hordeola, 181 Porphyraspis iristis, 212
Phyllotr eta a-p., 211 Porthesia similis, 161
Phylloxera vastatrix, 124 Pna dulcamera, 193
Phytophaga, 11, 177, 206 Priocnemis bicolor, 262
Pieridse, 10, 53, 147 Prionid£e, 11, 175, 213
Pier is brassicce, 15, J 48 Prionis coriarius, 213
bryonioB, 27 Proconia undata, 122
daplidice, 148 Proctotrypida;, 12, 56, 232
«api, 27, 148 Pronuba yuccasella, 23
mp(B, 27 148 Prosopis signata, 240
Pigeon Tremex, 227 Protection of eggs in ClythridaJ, 209
Pimpla fairmairii, 229 Protective colouring, 42
rw/aia, 229 mimicry, 47
Piophila easel, 312 Protura, 8
Pipunculidse, 13, 302 Psammocharidffi, 12, 261
Pipunctilus fuscipes, 302 Pselapidse, 11, 39, 191
Pityogenes bidentatus, 219 and ants, 39, 192
Plagiolepis sp., 271 Psen concolor, 267
Plague, 57, 281 Pseudococcus citri, 126
Planipennia, 9, 17, 55, 56, 127 Pseudomyrma bicolor, 276
Plant lice and ants, 37 Psilura monacha, 160, 161
Platypsillida3, 11, 190 Psithyrus sp., 252
Platyrrhinus latirostris, 215 Psocidae, 8, 29, 100
Plea minutissima, 117 Psocojitera, 8, 100
Plecoptera, 8, 18, 76 Psoctis bipunctatus, 101
Plectrocnemia, decoys of, 138 citricola, 102
Plusia festuccp, 167 venosvs, 101
Podagrion pachymerus, 232 Psychida-, 10, 154
Poduridse, 8, 59 Psychodidae, 12, 57, 290
Poecilocampa populi, 159 Psylla, Pear tree, 123
Poecilocapsus lineatus, 1 14 pyricola, 123
Pogonomyrmex barbatus, 275 Psyllida;, 9, 55, 104, 123, 267
Polistes metricus, 49 Pterochroza ocdlata, 92
 INDEX 337
Pterophoridaa, 10, 170 Sarcophila carnaria, 309
Pteroslichus cupreus, 185 magnifica, 309
madidus, 185 Sarcopsillidse, 279
picimanus, 185 Saropoda himaculata, 249
striola, 185 Saturnia pavoiiia, 150
Ptinidce, 11, 198 SaturniidsG, 10, 150
Plinusfur, 198 Satyridae, 10, 145
Pty diopter a sp., 292 Satyrus seniele, 145
Ptyelus rjondoti, 122 Sawfly, 29, 236
" Pugs," 164 Currant, 225
Pviex irritans, 279, 281 Gooseberry, 225
Pulicidaj, 12, 279 egg-laying of, 225
Pupiparia, 13, 19, 20, 314 Scale Insects, 35, 104, 125, 130
Pyralidt^j, 10, 54, 168 and Ants, 35
Pyralis farinalis, 168 and Ladybirds, 126
Pyrophorus noctilucus, 202 Black, 126
Pyrrhocoridcc, 9, 108, 109 Cottony cushion, 125, 196
Pyrrhoconis apterus, 108 Peach, 167
San Jos6, 126
Ranatra linear is, 115 Scarahoeus sacer, 179
Rat-tailed Maggot, 24, 284, 304 ScatophagidsB, 13, 312
Beduvius personatus, 112, 113 Sceliphron Icetus, 265
Reduviidae, 9, 56, 105, 111 madraspalanus, 265
Reduviids, mimicry in, 112 spirifex, 265
Rhamnatocerus higuttatus, 94 Scenopinidae, 12, 298
RhapMdidae, 9, 129 Scenopinus fenestralis, 298
RhipipJwrus paradoxus, 256 Schizodactylus monstrosus, 90
Rhizotrogus solstitialis, 181 Schizoneura lanigera, 124
Rhodites rosce, 234 Sciara militaris, 286
Rhopalocera, 10, 139, 141 migration of, 286
Rhyacophilidge, 9, 137 Scolta atrata, 260
Rhyiichites betulce, 217 bifasciata, 259
Rhynchium brunneum, 255 interrupta, 259
Rhynchophora, 11, 177, 206, 215 ScoliidK, 12, 259, 260
Rhyiichophorus palmar um, 218 ScolytidiB, 11,54,218
Rhynchota, 8, 18, 52, 55, 56, 57, 104, Scolytus destructor, 219
221 Scoparia dubilalis, 168
Rhyssa persiiasoria, 229 Scutellista cyanea, 126
Robin's Pincushion, 234 Seasonal dimorphism, 26, 140
Rutelidffi, 10, 54, 181 Semi-loopcrs, 167
Sepsidffi, 13, 312
Sagria huqueti, 208 Sericabrunnea, 181
seraphica, 208 Sericaria mori, 151
splendida, 208 Sericostoraatidse, 9, 137
Sagridse, 11, 207 Serricornia, 177
Saissetia olece, 126 Sesia tipuliformis, 154
Saltatoria, 83 Sesiidse, 10, 53, 154
Saperda carcharias, 214 Sessiliventres, 12, 224, 225
Sapyga clavicoryiis, 260 Sheep Tick, 314
5-punctata, 260 Shellac, 58
Sapygida;, 12, 260 "Shiner," 188
Sarcophaga, 19 127
SialidiB, 9,
Sarcophagidco, 13, 57, 309, 310 Sialis lutaria, 127

43
338 INSECT LIFE
Sigara mimitisswia, 117 Stauropus fagi, 153
Silkworm, 57, 140, 151, 309 Staphylinidse, 11, 39, 192
Silpha atrata, 191 and Ants, 39
IcBoigaia, 191 Stegomyia fascia/a, 287
opaca, 191 Stelis ininvta, 248
quadripunctata, 191 nasuta, 240, 243
rugosa, 191 signata, 248
sinuala, 191 Stenopelmatus sp., 93
thoracica, 191 Stenophylax sp., 137
Silphidaj, 11, 120 Sternccera casianea, 203
Silver fish, 40, 61 Stick Insects, 43, 83, 88, 112
Simulidae, 12, 57, 293 thick-thighed, 89
Simulium elegans, 295 Stink fly, 133
sericemn, 295 Stink glands of Bugs, 105
Sinodeiidron cylindricum, 179 Stomoxys calcitrans, 310
Siphonoptera, 12, 17, 56, 57, 273 Stone Hy, 76
Siphunculata, 63 Straight wings, 82
Sirex g>gas, 227 Stratomyidse, 12, 295
noclilio, 227 Siratomys chameleon, 296
Siricidje, 12, 55, 227 sp., 295
Sisyra sp., 132 Strepsiptera, 11,220
Silaris hmneralis, 21, 22 Strongylium sp., 204
Sliipjacks, 201 Stylopidae, 11, 220
Sleeping sickness, 57, 282, 310, 311 Stylojjization, effects of, 221
Smerinthiis ocellatus, 152 Surra, 310
popvli, 152 Symbiosis, 35
Smynthuridae, 8, 60 of Phenax auricoma, 120
Smynthurus luteus, 60 Sympetrnm scoticum, 75
courtship of. sp., 65
Snake doctor, 128 Syrphida), 12, 303
feeder, 65 Syrphus seleniticus, 304
fly, 120
Social habits, 29 Tahanidm, 12, 57, 237, 301
Song of Cricket, 92 larvae of, 297
of Locust, 92 Tahanus hovinus, 297
of Passalida;, 178 Tachinidffi, 13, 56, 308, 309, 310
Spathogaster haccarum, 26 T any pus sp., 290
Sphmra acaroides, 174 Tapinoma erraticum, 274
Sphaeridse, 174 Telophorus lividus, 200
Sphecius speciostis, 266 pellucidus, 200
iSphecodes gihhus, 244 ruslicus, 200
ruhicundus, 243 Tenehrio molitor, 203
suhquadratus, 243 Tenchrioides mauritanicus, 194
Sphegida;, 12, 263 Tenebrionidse, 11, 54, 174, 203, 204
Sphegides, 263, 265 : Tent caterpillar, 172
Sphex, nest of, 2G4 maker, 53
SphingidiB, 10, 151 I
Tcnthrcdinida3, 12, 55, 225
Sphinx co7ivclvuli, 151 I
Termes hellicosus, 185
ligiistri, 44, 151 flavipes, 80
Spilosoma fvliginom, 162 I
lucifugus, 80
luhricipeda, 163 I
tuhiformans, 80
menihastri, 163 Termite, 20, 29, 30, 78, 185, 192, 223
I

Springtails, 50 I castes, 82
 INDEX 339

Termite, cleanliness of, 82 Trichodectida;, 8, 62

colony, SO TricJiodcs alvearius, 200
Nasuti, 82 ajnarius, 200
nuptial flight, 80 Trichoptcra, 9, 17, 134, 170
Queen, 81 Trichroism, 145
soldiers, 82 Triungulin, 21, 22
workers, 82 Trochilium crahronijormis, 48, 154
Termitidcc, 8, 78, 100 Trogositidse, 11, 194
Termitoxeniidse, 20 Trox sp., 180
Tetramorium ccespiium, 275 Truxalis sp., 96
Tetlix sp., 96 Trypanosoma brucei, 311
Thanasimus forinicarius, 200 gambiense, 311
2'heda betulce, 147 Trypetidse, 13, 313
pruni, 147 Trypodendron domcsdcum, 279
quercus, 147 lineatum, 219
rubi, 43, 147 Trypoxylon sp., 236
tc-album, 147 Tubulifera, 12, 224, 234
Thripidte, 8, 102 Turnip flea, 211
Thrips, 102 fly, 211

structure of, 102 Tussore silk, 150

Flax, 103 Types of patterns, 48
Orange, 103
Pea, 103 Ugimyia serricaria, 309
Pear, 103
Thyatira 153
hatis,
derasa, 153
Vanessa antiqua, 143
atalanta, 142
Thynnidse, 12, 259
c-album, 142
Thysanoptera, 8, 52, 55, 102
cardui, 142
Thysanura, 8, 18, 60
io, 142
Tick, Sheep, 314
polycMoros, 142
Timarcha tenebricosa, 210
urticoe, 141
turbida, 210
Variation, 30
Tinea bisdliella, 172
Vdleius dUatatus, 192
pelliondla, 172
Velia currens, 111
tapetzella, 171
Vermileo degeeri, 296
vastdla, 172
Tineid^, 10, 53, 54, 171, 233 Vespa arborea, 255
austriaca, 255
Tingidje, 9, 55, 109
crabro, 48, 255
Ti)igis pyri, 109
germanica, 255
Tiphia sp., 260
norvegica, 255
Tipula brdbdignagia, 291
rw/a, 255
oleracea, 291
sylvestris, 255
Tipulidffi, 12, 54, 291
vulgaris, 255
Titanus giganteus, 175, 213
VespidiB, 12, 253, 255
TUenacris albipes, 96
Tortricidaj, 10, 53, 171
Viviparous insects, 19
Tortrix ribeana, 171
Volucdla bombylans, 305
viridana, 171
Mianis, 303, 304
Tree weeping, 122 sp., 256
Tremex columba, 227
Pigeon, 227 Wasp, 29, 123, 130, 192, 194, 221, 223,
Trichacis sp., 233 236, 253
Trichins fasciafiis, 1S2 Digger, 56, 237, 257
340 INSECT LIFE
Wasp, food of 256
larva;, Weevil, Cotton Boll, 46, 216
fossorial, 56, 237, 257 Grain, 217
Mud, 235, 253 Nut, 216
parasites of, 256 Palm, 218
Potter, 235, 258 Pea, 206
prey of Robber flies, 301 Pine, 216
Ruby, 234, 240 Plum, 217
Sand, 264 Rice, 217
Social, 56, 222, 255 Wet season forms, 26
nests of, 255 White Ant, 79
Solitary, 253 as food, 79
Wood, 227, 229 White fly, 104, 125

Blue, 227 " Whites," 148

Giant, 227 Wintering of insects, 26
Water Boatman, 116 Wireworms, 201, 204
Cricket, HI Worm-eaten wood, 198
Gnat, 110
Grampus, 128 XenoTpsylla cheopis, 28
Measurer, 110 Xe7ios sp., 222
Scorpion, 115 Xestobium domesticum, 198
eggs of, 115 tessdlaium, 198
Stick insect, 115 Xyleborus dispar, 219
" Waves," 164 Xylocopa violacea, 245
Webs of Dance fly, 301
Weeping trees, 122 Zaitha sp., 116
Weevil, 173, 215 Zeugloptera, 8, 9
Acorn, 216 Zeuzera pyrina, 156
Apple blossom, 217 Zoraptera, 8
Birch, 217 Zygmna filipendula, 154
Biscuit, 198 ZygvenidcB, 10, 154

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