if- a:' ■i'^?«^''S'*'-'?'.''^'v'-'^''^5 '^^'^-i^^ NSECTS.1 '•I&;^'j mi ■■Ami" Mi:' '£' BROAD HeviJ/C^.Wood 5S y i^^^ ■3^ LIBRARY OF 1885- IQ56 PLATE III INSECTS ABKOAD. BEING A rOPULAR ACCOUNT OF POEBIGN INSECTS, STRUCTCTRE, HABITS, AND TRANSFORMATIONS. REV. J. G. WOOD, M.A., F.L.S., &c, j ^ 7 I AUTHOR OF 'insects at home,' 'homes without hands,' 'BIBLE ANIMALS,' ETC. a. ILLUSTRATED WITH SIX HUNDRED FIGURES, BY E. A. SMITH AND J. B. ZWECKER, ENGRAVED BY G. PEARSON. NEW EDITION. LONDON : LONGMANS, GREEN, AND CO. PREFACE. The object of this work is two-fold ; first to show the great and important part played by Insects in the economy of the world, and the extreme value to mankind of those insects which we are accustomed to call Destructives ; and next to note the wonderful modifications of structure which enable the insects to fulfil their mission, and the surpassing- beauty with which many of them are endowed. Incidentally, many interesting points connected with insect life are described, as, for example, the manner in which many of them directly support human life by furnishing food, or being themselves eaten. Thus Bees not only furnish honey, but in several countries are themselves eaten while in the state of grub-dom, together with the " bee-bread " which has been laid up in the cells. Several "Wasp larviB share the same fate. Then, there are the Locusts, which, although they destroy vegetable life, are in many parts of the world invaluable in preserving animal life, by furnishing food, not only to man, but to beasts, birds, and reptiles. Termites, again, form a favourite article of food in almost every country where they are found ; while in Avistralia, the fat-bodied Butterfly popularly called the " Bugong Moth," affords nourishment to thousands of the natives, and in a few weeks changes them from starvelings into plump and contented beings. The Dragon Flies are employed in the same manner in the same country. VI PREFACE. Even in civilized lands insects are utilized for food. Put- ting aside the cheese mites and "hoppers" with which we are all familiar, we find the Mexicans employing a certain honey- gathering ant for the purpose of making mead. In Europe the common Wood Ant is much used in the manufacture of vinegar, and in the South of France the same insect is pressed into the service of the pastry-cook, beiug used to flavour a certain sort of cream called " creme aux fourmis." By way of retaliation, the voracious Mosquitos are themselves eaten in some parts of the world. It is related by Livingstone, that the insects swarm in such vast multitudes on the banks of the JSTyassa Lake, that they are gathered in bags and pressed into circular cakes about an inch thick and seven or eight inches in diameter. These cakes, called " kungo," somewhat resemble caviare in flavour. Larvta, especially those of the larger beetles, form an im- portant branch of food in many countries, and in some, as in certain parts of Australia, are absolute necessities. Among them may be mentioned the celebrated Gru-gru grub of the West Indies. It is the wood-boring larva of a gigantic Weevil, and when taken from tlie tree is held by the liead and eaten alive. However repulsive the notion may appear, it has been found that when Europeans have once been induced to try the Gru-gru, they have always held it as one of their best dainties. Perhaps the most curious article of insect-food is the egg of one of the Mexican Water- boatmen (Corixa). These eggs are laid in countless numbers upon bundles of reeds which are sunk for the purpose. In a fortnight the reeds are covered with eggs, which are scraped off and made into cakes under the name of " haoutle." Some of the insects are useful to man in a secondary manner by producing articles which are almost necessary adjuncts to civilization, such as the wax of the Bee, the irritant juices of the Blister Beetle, the dye of the Cochineal, and the "lac" of its near relative the Lac Insect. Vreface. vii Lastly, as to the book itself. Eight hmidred and sixty insects have been described, six hundred of which have been figured, the illustrations and descriptions having all been made from the actual specimens. In order to ensure accuracy in rendering the " texture," the engraver has taken the trouble to inspect the insects themselves before touching the block on which they were drawn. The reader may form some idea of the labour which has been expended in the work, when I mention that more than three thousand drawers of insects have been ex- amined, each drawer containing, on an average, some fifty specimens. I now have the pleasing task of thanking most heartily tlie officers attached to the Insect Eoom in the British Museum, for the kind assistance which they rendered through some three years, and the generous manner in which they afforded infor- mation that could have been obtained from no other source. Belvedere, S.E. May 9th, 1874. C O N T E N T b\ COLEOPTEIJA, 01? BEETLES— (,'n. I.^IxraoincTioN ........ II. — Tiger 1'eetles, ok CicIiNdeliu.e .... III. — (iRouND Beetles, or Carabid.e .... IV. — Ground Beetles, or Cakabid.e — coatinacd . V. — Hydradephaga, or Predacious "Water Beetles VI. — Paussid^ and Braciielytra, or RuVe Beetles . VII. — NeCROPHAGA, or CARRION-EATKliS .... VIII. — PeCTINICORNES, OR CoMB-HORNED BEETLES . IX. — Lamellicorx, or Llaf-horned Beetles, .sometimes c Petalocera X. — Lamellicorxs — continued XI. — Sternoxi, or Skipjack Beetles .... XII. — Malacodermi, or Soft-skinned Beetles XIII. — Heteuomera, or Party-legged Beetles XIV. — Riiynchophora, on Weevils XV. — Weevils — continued, XVI. — LOXGICORXES, OR LoXU-HORNED BEETLES XVII. — Piiytophaga, OR Plant-eaters .... XVIII. — PSEUDOTRIMERA . 1 6 28 46 65 72 81 91 109 129 146 166 173 193 215 229 253 267 EARWIGS— Ch. I. — Dkr.maptera, or Euplexoptera 277 ORTHOPTERA— Ch. I. — BL.4.TTID.E, OR COCKROACHES 285 II. — Mantid-e, or Leaf Insects 290 III. — Ambulatoria, or Walking-stick Insects .... 300 IV. — Saltatoria, or Crickets, Gilisshoppers, and Locusts . 317 THYSANOPTEHA- Ch. I. — Thripid.e 347 X CONTENTS. PAGE NEr^ROPTERA— CH. I. — LiRKLLULIDiE 353 11. — MYRMELEONiD.ffi:, S1.A.LID.?:, Mantispid.?:, and TermitU).e . 365 HYMENOPTERA— Ch. I. — Saw Flies II. — Entomophaga, or Ichneumons and Gall Flies III. — AcULEATA. — MuTILLAS and SCOLIAR IV. — F0RMICID.E, OR Ants V. — POMPILID^, SpHEGIDiE, AND BEMBECID.E . VI. — Solitary and Social Bees .... 385 393 417 427 451 506 LEPIDOPTERA ; OR, BUTTERFLIES AND MOTHS— Ch. I. — Papilionid^ 535 U.— BvTTERYL-iF.s— concluded 598 III.— Moths 632 HEMIPTERA; OR, HETEROPTERA 709 HOMOPTERA 733 DIPTERA 749 DESCHIPTION OP PLATES. PLATE I. To face p. 11 1. Tetraclia pimctata. 2. Tetracha punctata, larva. 3. Calochroa princeps. 4. ilormolyce phj-llodes. 5. Anthia sex-guttata. G. Mouliotia glorissa. PLATE II. To face p. l-2f. 1. Eucheirus Macleayi. 2. Dynastes Hercules. 3. Golofa liastatu.s. PLATE III. Frovf. 1. Goliatluis Dvuryii. 2. Dicranocephalus Bowriugii. 3. Ehamphorhiua Petersiana. 4. Entimus splendidus. 5. Cyphus Linnaei. PLATE IV. To face p. 243 1 . Acrociuus longinianus. 2. Batocera Celehiana. PLATE V. To face p. 29 u 1. Mantis tinctipennis. 2. Mantis tinctipennis. 3. Deroplatys desiccata. PLATE VI. To face p. 325 1. Sanaa imperialis. 2. Acridoxena Hawaiiana. PLATE VII. To face p. 35(5 1. Palpopleura niarginata. 2. Palpares Caffer. 3. vVscalaphus Kolyranensis. 4. Ascalaphus Kolyranensis, larva. PLATE VIII. To face p. 47G 1. Trypoxylon rejector. 2. Parapison nifipes. 3. Eumenes esuriens. 4. Rlivnchinm nitidnlum. Xll DKSCKnTlON OF l'l,ATKS. PLATK IX. T« fucc ji. 45» 1. Pt'psis lieros. 2. Pelopteus Iwtus. '6. Vespa in;iiidiirinia (female). PLATE X. To face 2h 518 1. C'lii-y.^autlietla frontalis. 2. Xylocopa morio. 3. Centris deiiudaus. 4. Euglossa romaiidi. PLATE XI. 1. Papilio Brookeanus. 2. Papilio Pauthous. To face p. 543 PLATE XII. To f Me p. 557 1. Papilio Joesa 2. Papilio Eiichenor. PLATE XIII. To face p. 585 1. Hestia Idea. 2. Charaxes Eudamippus. PLATE XIV. To face p. 5^5 1 . Caligo Eurilochus (upper side). '2. Caligo Eurilochus (under side). I'LATE XV. To face p. (344 Ciequu-sa Austi-alasise. C'yrlosia sanguifera. PLATE XV L To fare p. 669 1. Attacus Jorulla. 2. Phyllodes consobriiia. PLATE XVII. To face p. 676 1. Tropsea Leto. 2. Gmanisa Isis. PLATE XVIII: To face p. 732 1. Cicada adusta. 2. Hotinus maculatus. ly 3. Pojciloptera circulata. PLATE XIX. To face p. 716 1. Diactor bilineatus. 2. Dalader acuticosta. 3. Pygoplatys lancifer. 4. Oncomeris flavicornis. PLATE XX. To face p. 752 1. Paugonia longirostris. 2. Acanthomera magnifica. 3. My das giganteus. 4. Phellus glaucus. INSECTS ABROAD. CHAPTER I. INTRODUCTION. yX this our favoured country tlie insect tribes play apparently -^ so insignificant a part in the economy of the world, that few except professed entomologists have the least idea of their real importance, their vast, silent, and unseen armies, and the enormous power which they wield. I say unseen, because none but a practical entomologist ever sees one insect in ten thousand, even when they have attained their perfect state ; and the most skilful naturalist can but con- jecture as to the countless hosts of grubs and caterpillars that are hidden among the foliage, buried in the ground, submerged beneath the waters, burrowing under the bark or into the solid wood of trees, or leading a parasitic existence within the bodies of living animals. Insects pervade the whole of Nature, and the functions which they perform are so important, that they deserve from man far more attention than he generally condescends to bestow. Individually an insect is small, feeble, and, in the eyes of most persons, contemptible. Collectively, the insect tribes are a mighty host, exercising over our world an influence that excites equal wonder and admiration in the minds of those who can appreciate it. Still, important as are the insects in this country, those of tropical lands have infinitely more influence, and that for a very B 2 INSECTS ABKOAD. evident reason. They have more vi^ork to do. By dint of daily increasing and improving agriculture, and by the rapid growth of population, we have so completely altered the surface of our land, that many species which were formerly abundant have utterly perished, and many others are becoming scarcer year by year. Insects do not now play nearly so conspicuous a part as they used to do, and in consequence they do not attract the notice of persons unaccustomed to observe. It is otherwise in many other parts of the world, especially those which lie be- tween the tropics; and the natural consequence is, that when inhabitants of more temperate climates travel in hot countries, the insects force themselves upon their attention. Unfortunately for science, however, the average traveller never thinks of observing insects for their own sakes, and only takes notice of those which annoy him. Unless they bite him, sting him, spoil his clothes, attack his cattle, or eat his provisions, he passes them by with utter indifference, and seems not to be aware that such creatures as insects exist. As to searching for the work which they, like all created beings, have to do in the world, such an idea never enters his mind, and he seems to look upon insects merely as if they were made for the especial pur- pose of being either avoided or destroyed. Yet, taking even the many insects which are most trouble- some to travellers, we can see how important are the tasks which they have to perform, and how great is their influence upon the face of Nature. Take the first insect of which travellers unite in complaining, the hated and dreaded Mosquito. In its perfect, or winged state, it is about as annoying a creature as can be, but then it must be remembered that the traveller is but a casual intruder in the natural domain of the mosquito, and must expect the conse- quences of his intrusion. Devouring travellers is not the normal occupation of the mosquito, for hundreds of successive generations may live and die, and not one of them ever see a human being. Their real object is a beneficent one. In their larval state they live in the water, and feed upon the tiny particles of decaying matter that are too small to be appreciated by the larger aquatic beings, and, by devouring them, purify the water and convert death into life. Even in our ponds at home, we are much indebted to the gnat larvae for saving us from THE MOSQUITO AND THE ANT. 3 miasma ; while the vast armies of mosquito larv?e that swarm along the edges of tropical lakes and feed upon the decaying substances that fall from the herbage of the banks, purify at the same time the water and the atmo.sphere, and enable human beings to breathe with safety the air in which without their aid no animal higher than a reptile could have existed. The next insect plague of which a traveller complains is generally summed up in the word Ants. He seldom troubles himself to ascertain the species of the ant, to preserve specimens for the benefit of science, or to obtain the least insight into their habits. All he knows or cares is, that some ants, which were very small, stung him, each sting feeling like the prick of a red- hot needle. Some, which were very large, bit him even through his clothes, and held on with such more than bull-dog tenacity, that after the bodies were torn away, the heads not only retained their hold, but went on biting. Then, multitudinous ants, large, small, and middle-sized, swarmed into his room or tent, and ate up his provisions almost before his very eyes. If he put the legs of the table into water, they made extemporised pontoon bridges of their bodies and extended legs, and so enabled the ant-armies to scale the citadel, despite of the moat. If he hung his shelves from strings, the ants crawled down the strings. And, if he did succeed in isolating a table by putting the legs in saucers full of oil, the ants crawled up the walls, then on the ceiling, and then dropped on the table. They ate his food, they swarmed into his drink, and they tore to pieces all his birds and other specimens that he had collected. Of course this conduct was anything but agreeable, and it was very natural that the traveller, looking at everything as it affected himself individually, should feel aggrieved, and wonder why such mischievous creatures should have been made. But if we put aside the temporary and individual inconvenience caused to the traveller or colonist, and look to the real mission of these detested insects, we shall find that they play on the land a part like that of the mosquitos on the w^ater, and rank among the most important of the scavengers of the earth. Their presence is undoubtedly disagreeable to individual men, but mankind w^ould suffer severely if the Ant tribes were to be extinguished. B 2 4 INSECTS ABROAD. Take two more insects, which are beyond measiTre annoying to man, — namely, the wood-boring beetles and the termites, other- wise, but very wrongly, called white ants. Nothing can be more disheartening to a planter than to have his trees and canes devoured by the beetles, and every bit of timber in his house destroyed by the termites. We shall in the course of this work see examples of the ravages of both insects, so that we need not go into details now. Yet, strange as it may seem, but for the effects of these wood-destroying insects there would be no forests at all. Suppose, for example, that all these insects were immediately exterminated, the results would be much as follows. A vast tree, one of the giants of the forests, dies, and is blown down in one of the fierce hurricanes of tropical climates. Where the tree fell, there it lies, and where it lies it cumbers the earth, and prevents other trees from springing up in its place. Years roll on and become centuries, tree after tree falls, and slowly but surely arrives the time when the place of the towering- forest, with all its wealth of life, is taken by a vast wilderness of dead and fallen tree-trunks. How different is the beneficent operation of Nature under the present conditions. Scarcely has a tree fallen than the insect hosts are at work on it. First come the large and powerful wood-boring beetles and deposit their eggs upon it. Armed with their sharp and strong jaws, which act like bone-nippers, the larvae bore through and through the trunk, making tunnels like auger-holes, and so rendering the tree permeable to air and wet. Smaller beetles soon follow in the wake of the large, and bore out the softened wood, and a host of other insects set to work on tlie now decaying trunk, many using it as food, and others carrying it off as material for their nests. The rapidity of their work is astonishing, and in an exceedingly short time the entire tree is reduced to mere dust. " Put thy foot," writes Waterton, in his " Wanderings," " on that large trunk thou seest to thy left. It seems entire amid the surrounding fragments. Mere outward appearance, delusive phantom of what it once was ! Tread on it, and, like the fuzz-ball, it will break into dust." And this dust serves as a fertilizer to the soil, and enables it to produce fresh trees in the place of that which had fallen. Take the white ants again, even apart from their wood-eating propensities, and see what good service they do even by the VALUE OF INSECTS. 5 simple act of building their wonderful nests. They are per- petually engaged in transferring to the surface of the earth the soil which they have taken from beneath it, and so continually renewing and fertilizing it with fresh soil. These insects indeed play very much the part that our much-despised mole and worm do at home. It would be easy to multiply examples indefinitely, but I liave chosen these insects in order to show how even the very creatures which are most detested by man, and do him the most direct damage, are indeed, though indirectly, among his best benefactors. Apart from direct benefit or injury to man, the whole of the insect tribes are working towards one purpose, namely, the gradual development of the earth and its resources. The greater number are perpetually destroying that which is effete, in order to make way for something better; while others, whose business seems chiefly to be the killing and eating of their fellow-insects, act as a check to their inordinate increase, and so guard against the danger of their exceeding their proper mission. CHAPTER II. TIGER BEETLES, OR CICINDELID-E. At the head of the insect race are by common consent placed the .multitudinons species which are collected under the common title of Geodephaga. This very appropriate title is formed from two Greek words, signifying devourers of the earth, and is given to the large group of carnivorous Beetles which live on the ground, in contradistinction to another great group of carnivorous Beetles which live in the water, and are called Hydradephaga, or devourers of the water. In both these groups, the larva or grub, and the perfect insect, agree in their general habits, so that the larvae of the first group are always found on land, and those of the second group as invariably in the water. Equally by common consent of entomologists, the Tiger Beetles have been placed at tlie head of the Geodephaga. For- merly they were all classed under one family, the Cicindelidae, but of late years, in accordance with the ever-growing mania for subdivision and over-refining, they have been split up into a number of families, the first of which are the Mantichoridte, a oToup of which we have no British representative. The name is a very curious one, and I will explain it before describing the insect which is our representative of the tribe to which it belongs. Some 2,300 years ago, there lived a certain Greek historian named Ctesias, who was taken prisoner by Artaxerxes Mnemon at the battle of Cunaxa, so celebrated for the retreat of Xeno- phon's famous " Ten Thousand." Profiting by his honoured cap- tivity of seventeen years, during which time he was the physician of Artaxerxes, he wrote a history of Assyria and Persia, in which he introduced accounts of sundry remarkable animals. There THE MANTICIIORA. 7 were ants, for example, as large as foxes, and, above all, there was the Martichora, a Grecized form of the Persian word Mard- khora, or Man-slayer. This Martichora, a portrait of which is now before me, had the body of a lion, the head of a man, and the tail of a scorpion, armed at the tip with a bunch of porcu- pine's quills, which the Martichora used as missile weapons. Hinging them at its enemies by a jerk of its tail. Although the beast's mouth was armed with three rows of triangular teeth (evidently borrowed from the shark), the armed tail formed its principal defence ; so that when hunters caught a young Martichora, they bruised its tail between two stones, so that it should never grow any more quills. Corrupted — probably for the sake of euphony — into Mantichora, this name was fancifully given to the present group of insects, in consequence of their size, strength, and ferocity. Fig. 1.— Mantichora mviraloides. The species which has been selected for our example of this family is the Mantichora (not Manticora, as it is generally, but wrongly, spelled) inygaloides. It is a most extraordinary looking Beetle, and may well puzzle entomologists as to the place which it holds in the insect world. There is something about it that shows its connection with the Tiger Beetles, whose terrible jaws are absolutely exaggerated in the Mantichora. There is some- thing about it that looks like a Carabus, or Ground Beetle, and the general shape of the body bears such a curious resemblance to that of the well-known Bird Spider of South America, that it 8 INSECTS ABROAD. has received on that account the specific name of mygaloides, i.e. like the Mygale. Its colour is black and shining, and the creature has a singu- larly menacing air, so that it well merits the fanciful name that has been bestowed on it. Generally, the Tiger Beetles are fur- nished with powerful wings, but the Mantichora is entirely wingless, the elytra or wing-cases being soldered together, so that the insect is unable to leave the ground. The part of this Beetle which most strikes the eye is the head, wuth its armature of crooked and most powerful jaws. In the illustration the jaws are represented as they appear when open. When they are closed, they cross each other nearly as far as do the fingers of the clasped hands, so that a bite from one of these formidable insects is no joke, even to a human being. Most, if not all, of the Tiger Beetles have their jaws thus crossing each other at the tips, — a provision, as I imagine, for retaining in their grasp the insect prey on which they feed. In this insect the jaws are nDt regularly curved, as is generally the case with insects, but take a sharp and almost angular bend at about one-third of their length from its base. The side of each jaw, or mandible, as it is scientifically called, is strongly toothed at the base, and altogether the insect possesses a prehensile appa- ratus that has few parallels among its many kinsfolk. The habits of the Mantichora are just those which might be inferred from its appearance and structure. It is swift of foot, quick and active in general movements, and, living in the dry sandy plains of Southern Africa, has a way of hiding beneath stones from the fierce glare of the sunbeams, and of darting quickly from its place of concealment when any creature passes by on which it can pounce. The insect is represented of the natural size. This tribe, the Mantichorides, is separated from the Cicin- delides on account of the structure of the fore-legs, which have the tarsi similarly shaped in both sexes, ard with cylindrical joints. The present species was called by Thunberg Ciciiidela (jigantea. Another tribe of the Tiger Beetles is that which is called IMegacephalides, or Big-headed Tiger Beetles. In these, as the name implies, the head is very large, so as to give the insects ODOUR OF TIGER BEETLES. 9 rather a clumsy look. Their legs are exceedingly long, and, indeed, it is not easy to say whether the large head, or the long and slender legs, first catch the eye. They are winged, ])ut their wings are not nearly so long or so strong as those of onr British Tiger Beetles, so that they are more to be found on the eartli than in the air. There is one species, indeed, Mcgaccphala scpulrJiralis, a native of Brazil, which appears never to take to the wing, but runs very swiftly through the grass that grows on sandy soil in the forests. Most of the Tiger Beetles have a similar habit, and these insects are therefore often called by the popular name of Sand-runners, or Sand Beetles. This species gives out a per- fume which much resembles attar of roses, but which changes after death to a very foetid and disagreeable odour. The reader may perhaps remember that our common British Tiger Beetle exhales a strong and pleasing scent like that of crushed verbena plants, but happily, unlike the Brazilian insect, the odour does not become unpleasant after death. The accompanying illustration represents the largest of these insects, a very giant among its kin, drawn of its natural size. Its name is Mega- cepliala Semgalensis, and, as the latter word implies, is a native of Senegal. As is often the case with Tiger Beetles, Fki. 2.-MegacephHlaSe.iegal.M,sis. there is considerable variation in colour. The thorax, however, is always green and shining, and the elytra are always roughly punctated, i.e. covered with tiny holes as if the point of a blunt needle had been slightly pressed into the surface. There are very few r>eetles which are entirely without these punctures, whose use, 1 believe, has never yet been ascertained or even conjectured ; but in some species they assume a very decided importance, the interior of each puncture being In-ightly coloured, while the general surface is simply dull brown or black. We shall soon lO INSECTS ABROAD. see examples of these coloured punctures, none of which, as far as I know, are to be found in our insects at home. The colours of the elytra in this species are strangely variable, some specimens being brown, some green, and some blue, the two latter colours being often interchangeable in insects, whether British or foreign. The head is always coloured like the thorax, and the legs are pale yellow-brown. The habits of some species of Megacephala are not only terrestrial, but subterranean. There are in the tropical regions sundry Beetles belonging to the same group as our common Dor Beetle, which make burrows in the ground under animal refuse. Tliere is a Brazilian species of Megacephala, which has an odd habit of taking possession of such borrows, and, like the knights-errant of old, defending them against all comers. Gene- rally it remains near the mouth of the hole, menacing all foes, real or fancied, with its powerful jaws ; but, should it find itself overmatched, it takes refuge at the bottom of the burrow. Even then it does not abandon its combatant character; for if a blade of grass be pushed down the hole, the Beetle is sure to seize it with its jaws, and hold on with such tenacity that it can be drawn out of the hole, still clinging to the end of the grass-blade. I have often wondered whether insects are capable of retain- ing their memory throughout their changes, so that a dragon-fly on the wing can recollect its sub-aquatic existence, and the butterfly, while sipping the sweet juice of flowers, remember its caterpillar banquet on the cabbage-leaf. If such be the case, we may readily understand how the Tiger Beetle comes to resort to the earth-burrow. It is, in fact, a returji to the habits of its larva-hood. All the Tiger Beetles live, when larvse, in burrows under a loose soil, remaining with their sickle-like mandibles expanded at the entrance, just like the jaws of a steel-trap, ready to seize any passing insect and carry it down to the bottom of the burrow, where it can be eaten in peace. And the mode of action when attacked is exactly the same in both cases, for, as all practical entomologists know, the recognised mode of obtaining the larvae of Tiger Beetles without hurting them, is by poking a straw or grass-blade into their burrows, and pull- ing them out gently while they cling to the supposed enemy PLATE I. LAKV^ OF TIOER BEETLES. 11 hv tlieii' strong jaws. Field Crickets are taken in just the same niannei". On Plate I. Fig. 1, is seen a very pretty Beetle which belongs to the same tribe as the preceding insect. It has no popular name, however well it may deserve one. but is known to ento- mologists as Tetracha pMnctata. It is a singularly beautiful insect, and, lovely as it is, to describe it is no easy matter. Many of these Tiger Beetles are coloured in such a manner that it is utterly impossible to define their leading hue. It all depends on the direction of the light, and in many cases, as in the present instance, the real ground hue of the insect is a matter of considerable doubt. The chameleon is nothing to the Tiger Beetle. I have made plenty of experiments on both creatures, and come to the conclusion that all the ground colour of a chameleon may be defined; that of many a Tiger Beetle defies all definition. And the more pains that are taken, the more the microscope is set to work, the less defined is the ground colour. In the present species there are only two points of colour which may be considered as fixed. One is a yellow patch at the end of the elytra, and the other is the yellowness of the legs and antennre. As to tlie upper siirface of the body, it may be said to be almost any colour. I have tried these Beetles in A'arious lights, and have ascertained that the leading colour is blue, fiery crimson, green, or bronze, exactly as the light happens to fall upon the insect, not to mention the intermediate colours of purple and violet which ripple over the surface as the light is shifted. As the name implies, the elytra are deeply and boldly punctured. The insect is found along the banks of the great Amazon river. At Fig. 2 of the same illustration is given the larva of this Beetle, for the purpose of showing the peculiar apparatus by which it is able to travel up and down the perpendicular tunnel in which it lives, and to maintain its place at the mouth of its burrow without fatigue. On the back may be seen a bold hump-like process, and on the hump are two small but strong horny hooks, set upon the eighth ring of the body, counting from the head. These hooks are boldly curved backwards, and it is chiefly by their help 12 INSECTS ABROAD. that the larva is able to scuttle up and down its tunnel with such rapidity. I never had the opportunity of seeing the larvae of these exotic Tiger Beetles alive ; but if their habits resemble those of our British species as much as their forms, there can be no difficulty in understanding the mode of their existence. Perhaps some of ray readers may be, or may have been, mighty bird-nesters, and been forced to climb trees which ran to some thirty or forty feet without a branch, and were far too large to be clasped by the arms and legs. Boys cannot carry ladders about with them, and the tree is absolutely inaccessible by ordinary means. But there is a hawk's nest on ^e topmost branches of the tree, and it is clearly impossible to allow the eggs to be hatched without paying a fair toll to the discoverer of the nest. So, out come the " climbing spurs," iron stirrujjs strapped to the foot, and having on the inside of each foot a Gharp hook, with point downwards. A long withy is now cut — or in default of the withy a stout piece of iron wire will do — and is passed round the tree-trunk. The nest-hunter takes the ends of the withy in his hands, raising the loop as high as he can, and then jumps at the tree, supporting his body by tiie withy, and driving his climbing-irons well into the bark. By a judicious shifting of feet, the young climber very soon finds himself among the branches, where his spurs are worse than useless, and he hangs them on a branch while he goes after the eggs. Now, except that the Tiger Beetle grub has to climb the inside of a cylinder instead of the outside, the mode of climbing is exactly the same. The larva stretches its body so as to raise itself as high as possible, and slightly bends its back, so that the points of the hooks hitch into the side of the tunnel. It then contracts its body, so as to haul itself up, and so, by re- peating the process, rapidly reaches the mouth of the burrow. When there, the hooks which raised it serve to keep it in posi- tion; and when it M'ishes to descend, it has only to unhitch the hooks and straighten the body, when it slides down by its own weight. The larva seen in the illustration is drawn from a specimen in the British Museum. Mr. W. Bates, in his " Naturalist on the Amazons," describes sundry species of Tetracha, and gives much curious and valu- COLOUR OF INSECTS. 13 able information as to their habits, mode of life, and variety of colonring: — " On tlie sandy beacli I found two species of Tetracha, a genus of Tiger Beetles, which have remarkably large heads, and are found only in hot climates. They come forth at night, in the daytime remaining hid in their burrows several inches deep in the light soil. Their powers of running exceed everything I witnessed in this style of insect locomotion. They run in a serpentine course over the smooth sand, and when closely pur- sued by the fingers in the endeavour to seize them, are apt to turn suddenly back, and thus baffle the most practised hand and eye. " I afterwards became much interested in these insects on several accounts, one of which was that they afforded an illus- tration of a curious problem in natural history. One of the Caripi species {Tetracha nodurna of Dejean) was of a pallid hue, like the sand over which it ran ; the other was a brilliant copper-coloured kind (Tctretclta 2JaUipcs of King). INIany insects whose abode is the sandy beaches are white in colour; I found a large earwig and a mole cricket of this hue very common in these localities. " Now, it has been often said, when insects, lizards, snakes, and other animals are coloured so as to resemble the objects on Avhich they live, that such is a provision of Nature, the assimila- tion of colours being given in order to conceal the creatures from the keen eyes of insectivorous birds and other animals. This is no doubt the right view, but some authors have a diffi- culty in the explanation on account of the assimilation of colours being exhibited by some kinds and not by others living in com- pany with them ; the dress of some species being in striking contrast to the colours of their dwelling-place. "One of our Tetrachas is coloured to reseml)le the sand, whilst its sister species is a conspicuous object on the sand ; the white s.pecies, it may be mentioned, being much more swift of foot than the copper-coloured one. The margins of these sandy beaches are frequented throughout the iine season by tlocks of sandpipers, who search for insects on moonlit niglits as well as by day. If one species of insect obtains immunity from their onslaughts by its deceptive resemblance to the sandy surface on Mdiich it runs, why is not its sister species endowed in the same way ? 14 INSECTS ABROAD. "The answer is, that the dark-coloured kind has means of protection of quite a different nature, and therefore does not need the peculiar mode of disguise enjoyed by its companion. When handled it emits a strong, offensive, putrid, and musky odour, a property which tlie pale kind does not exhibit. Thus we see that the fact of some species not exhibiting the same adaptation of colours to dwelling-places as their companion s])ecies, does not throw doubt on the explanation given of the adaptation, but is rather confirmatory of it.'' The problem which Mr. Bates endeavours thus partially to solve is a very curious and interesting one, and certainly is not settled by Mr. Bates's explanation. Were it true that all these insects were protected in one way or another, none of them would ever be eaten by other creatures. It is perfectly true that many insects are coloured so as to resemble the spots wherein they hide, and therefore escape the observation of birds and other insect-eaters. Some, again, resemble in shape as well as in colour the vegetation on which they live, such as tlie well- known caterpillars of the Geometry, or Loopers, which so exactly resemble twigs that none but an entomologist could detect them. So far so good, but, I think, no further. I am inclined to demur to ]\Ir. Bates's theory of the protection afforded by the evil odour of which he writes, and for this reason. Odours are grateful or the reverse according to the constitution of the smeller. For example, even in our own sense the apprecia- tion of odours varies extremely. The close, filthy, foetid atmo- sphere of an Irish cabin, which almost chokes an average Englishman, is like the breath of Paradise to the peasant owner. Put him in a large, clean, bright room, and he w\]\ complain of the cold, and make for himself a cabin in one corner, where he can be dirty and warm. Then, our nostrils are generally offended at the smell of rancid grease and un- washed humanity, which to a Kaffir are delightful as the perfume of the rose. To us, the stench of a putrefying animal is inexpressibly odious, and even hurtful, while to the vultures, and to whole tribes of insects, it is the delight of their lives. Therefore, though the odour of tliese highly-coloured, sand- loving Tiger Beetles be very detestable to liuman nostrils, it does not follow that it should be equally unpleasant to insect- eating birds. THE GOLD CROSS. 15 Most of the dusky Beetles which Mr. Bates mentions have been formed into a separate genus called Phreoxantha. This term is formed from two Greek words, the former signifyiiis dusky, and the latter yellow. The largest of them is called Phccoxantha Klugii, and is a curious-looking creature, quite unlike our English Tiger Beetles, except in the long, slender legs, and the sharp, sickle-like jaws with which the large head is armed. The general colour is dull, pale, yellowish brown, barred with a blacker hue. If this insect were runnino- on ordinary sand, it would be difficult to track its progress, in consequence of the sandy colouring of its body, while, if it remained still, it would be almost impossible to distinguisli tlie body amid the yellow sand and brown stones with which it would be surrounded. There is a very small sj^ecies of this genus, Pha-omnfJia laminata, wliich is found in Brazil. It is almost uniformly pale brown, and the hooks which arm the back of the larva are exceedingly long, stout, and boldly curved. We now come to the typical tribe of this beautiful and interesting group of Beetles called Cicin- delides, which are distinguished by the structure of the tar- sus, or foot. In all these Beetles the males have the three Fig. S.—GoldCTosaiCiamlelaanro/ci^ciata). first joints of the tar- sus widened and flattened, while the corresponding joints of the female are uniformly cylindrical. There are so many species of Cicindelides, that we must content ourselves with a selec- tion of one or two examples, the first of which is the Gold Cross {Cicindda aurofasciata) of India, one of the most striking, though by no means the most brilliant of the group. This very remarkable Beetle forms quite a type among its relatives, as in all of them there is a tendency to form a light-coloured cross on a dark ground, and in all, more or less, this cross is made by a V-shaped mark upon each of the elytra. Such is the case with the present insect. The general hue of 16 INSECTS ABROAD. the body is deep velvety black, and upon each of the wing- cases there is a V-shaped mark of golden yellow ; the apex of the V being towards the suture of the elytra, so that tlie two V's form a St. Andrew's cross of yellow on a black ground. As a rule, the lower limbs of this cross are twice as wide as the upper, but there is a \vonderful amount of variety in the cross-mark, not only in width, but in shape and colour. I have examined many specimens of this insect, and never found two which were exactly alike in the hue and form of their markings. Perhaps the most variable of all the Tiger Beetles is that lovely insect the Chinese Tiger Beetle {Cicindela Sinensis — or, as it is sometimes but wrongly spelled, Chinensis). Owing to its extreme variableness, it is not an easy insect to describe, and it is a remarkable fact that certain recognisable varieties are found in different districts of China, so that the boundaries of such districts cannot be merely arbitrary, but must have some geographical foundation. As it is so variable, I have selected an average specimen from my collection, and describe it as an example of the ordinary colouring. Just as in our common Tiger Beetles green is the leading colour, so blue takes the chief part in the Chinese Tiger Beetle. The ground hue of the elytra is deep, velvet azure, and they are edged with glittering golden yellow, which spreads over the shoulders so as to form a bold cross. Two bands of rich cream colour cross each elytra, near the tip, and there are two little spots of the same colour near the outer edge. Under successive powers of the microscope a wonderful sight is revealed. On placing the insect under a moderate power — say about thirty diameters — the whole of the surface is seen to be broken up into innumerable shining points, all of which have a golden sheen when the direction of the light is changed. Those portions which are not touched favourably by the light look absolutely brown, and it is most interesting to shift the light in various directions, and see the dark brown spots flash suddenly into violet, purple, green, and gold, and change back again to their dull brown, according as the angle of light is altered. Doubling the magnifying power adds to the revelation of this COLOUR. 17 insect's beauty, and shows tliat the glittering points are the edges of innnmerable pits or depressions with which the entire surface is covered. It is not, however, until a power of some two hundred diameters is employed that the real nature of these points and the cause of their changeful beauty are shown. Not in the minutest spot is there a smooth portion, but the elytron is com]-)letely covered with an elaborate series of six-sided pits or shallow cells. In fact, when viewed with a high power and a favourable light, the upper surface of the elytron looks very much like a honeycomb, the cells with which it is covered being perfectly hexagonal. The sides, however, of the cells are not equal as in the honeycomb, but two opposite sides are twice the length of the others, so as to elongate the cells without altering their hexagonal form. Tiie shape of the cells is best seen in the creamy spots, as the dazzling blue and green of the other parts rather distract the eye. Each of these cells has its surface furnished with countless dented lines set parallel to each other, and producing, by means of their power of decomposing the light, the wonderful effects of colour which have been mentioned. The gorgeous metallic plumage of the humming-bird's l)reast owes its splen- dour to a similar cause, and so does the changeful purple of our " Purple Emperor" Butlerlh'. The opal and the pearl also owe their colours to this system of parallel lines, which can now be produced artificially on almost any substance. Delicate parallel lines can be ruled on steel or glass, giving to them a llickering brilliance of colour that seems quite foreign to the material, which, indeed, appears to be of secondary importance. As long as the lines are there, the material seems to be of little consequence ; and if a piece of soft cobbler's wax be pressed on the ruled glass or steel, the lovely iridescence will at once be evident on its surface, despite the apparent incongruity of the dull black material and the splendid colours which play over it. Such are some of the revelations of the microscope with regard to the colouring of the velvet-like surface of the elytra. Now, to the unaided eye, the vivid green and azure of the heoxl are much more brilliant than the same hues in the elytra, while they are not so bright when placed under the microscope. The reason is this. The surl'ace of the head is covered with a double series of wTinkled folds, which are so large that they can be c 18 INSECTS ABROAD. detected by the eye alone, while the immmerable cells of the filytra cannot be seen without a microscope. The arrangement of these folds or wrinkles is worth notice. A line runs along the centre of the head, from which the wrinkles sweep in curves on either side, much like the lines of hair parted in the middle. Thus much can be seen with the naked eye ; but if the microscope be used, it will be seen that each wrinkle is regularly and elaborately waved throughout its length, thus, . — --^..^.-s..^ ; so adding to the richness of the effect. Still taking the human hair as our illustration, the waved structure of these wrinkles produces a similar effect to that which is obtained by ladies when they crimp their hair by artificial means. I have already mentioned that the upper surface of this magnificent insect is entirely covered with wrinkles or cells, so as to give it a satiny or velvety appearance. The violet under surface is quite smooth, and looks like burnished metal, affording a fine contrast to the softly brilliant hues of the upper surface. The one dazzles and startles the eye, the other soothes and satisfies it. The principle which is so perfectly carried out in this insect is followed imperfectly by ourselves. When a draper shows a piece of silk, satin, or velvet to a lady, he does not spjread it out flat, but gathers it into folds and artistic wrinkles. The reason is evident enough. Supposing that a yard of silk or satin be spread flat, there is a certain amount of colour, with a tolerably uniform distribution of light and shade. But, let three yards of the same material be gathered into the same space, it is evident that three times the amount of colour is obtained, while each fold gives different gradations of hue according to the depth of shades. This is one of the many instances where man unconsciously borrows from Nature, and complacently thinks that he has invented something quite new. Of the habits of this Beetle I know nothing by practical experience, but the specimen which has been most imperfectly described gives a curious proof that it must be quite as fierce as our British Tiger Beetles. The jaws of this species are long, sickle-shaped, deeply toothed on the inner edge, crossing each other when closed, and very conspicuous from their shining yellow colour. The jaws of this specimen are firmly closed, and hold in their grasp the fore-leg of another Beetle of the same species. THE EIGHT-SPOT TIGER BF.KTLK. 19 Two pieces of information are tluis given. Tiie first is, that the bold tooth on the inner edge of the jaw most effectually prevents the escape of any insect that may be sei;;ied. Let the reader imagine a pair of sickles, each having a sharp tooth some three inches long on the inner edge and abont four inches from the base. Suppose the handles of the sickles to be joined at their ends by a rivet on which they can play, and we shall have a very tolerable imitation of the Tiger Beetle's jaws. The reader will at once see that if the sickles are closed go as to bring the handles together, the points will cross each other, and thai if the leg or arm of a man be clasped in them the two teeth will give an additional hold, and, being nearer the base, will have a more powerful leverage than could be given to the points alone, how- ever sharp they may be. A familiar illustration of this principle is aflbrded by the schoolboy in cracking a nut. He does not idace it between his front teeth, but as far back as he can, so as to add as much as possible to the leverage. The second piece of information is, that the insect was not killed as soon as cauglit, but was placed alive in confinement with others of its own kind. After the liabits of such insects, the fellow-prisoners set to fighting, and this particular specimen succeeded in wrenching off the leg of its antagonist. The force required for such an act is wonderfully great. There are many insects that shed their limbs without seeming any the worse for it, but the Tiger Beetle is not one of them. It is predacious, and wants its legs for the purpose of chasing its prey. Consequently, these limbs are firmly jointed to the body, and the insect must have exerted very Lrreat streniith to tear away the entire limb as it has done. Fig. 4— Eiglit-.spot Tiger Beetle. (Cichuhla octonotata.) (Blue-green and yellow.) Another lovely species is the Eight- spot of India {Cicin- dcla odonotata), which is shown in the accompanying illustration. The colours of this most beautiful insect are much the same as those of the Chinese species, but their arrangement is more c 2 20 INSECTS ABKOAD. decided and very different. The giound colour of the elytra is the deepest and richest velvet-blue, edged with emerald green over which plays a golden glitter. The thorax is golden bronze at the edges, while the centre is metallic red or bronze, shot with green. The head is coloured like the thorax, and the spots are golden yellow. The legs of this species are very long, slender, and give a sort of spidery look to the creature. On Plate I., Fig. 3, is shown a very conspicuous example of the exotic Tiger Beetle. Its scientific name is Calochroa prin- ceps, but we may safely call it the Belted Tiger Beetle, on account of the three bold bars or belts which run across the body. The ground colour of the insect is velvet-black, and the bars are bright " king's yellow," as a painter would term them. It is a native of India. There are nine species of this genus at present known, and all of them are remarkable for their very long and very slender legs, which give to the insects a spidery sort of look. The name Calochroa is formed from t\\'o Greek words, signifying " beautifully coloured," and is very appropriate, as the colours of the insect, though not so vivid and rich as those of the Chinese Tiger Beetle, are very striking, and con- trasted in an exceedingly bold manner. In all these Beetles the tendency in the markings to form a cross is very notable, and much more so when the wings are closed than when they are spread as if in flight. The pretty Beetle which is shown m the accompanying illus- tration is one of a group which has rather peculiar habits. Mr. Bates, who allowed few insects to escape his notice, makes the following remarks on these Beetles : — " A variety of beautiful insects basked on the foliage where stray gleams of sunlight glanced through the canopy of broad green leaves. Numbers of an elegant, long-legged Tiger Beetle (Odontocheila) ran and flew over the herbage. It belongs to a sub-genus peculiar to the warmest parts of America, the species of which are found only in the shade of the forest, and are seen quite as frequently pursuing their way on trees and heibage as on the ground. " The typical Tiger Beetle, or Cicindela, inhabits only open and sunny situations, and are wholly terrestrial in their habits. SOUTH AiMEUICAN TIGEK BEETLES. 21 They are the sole forms of the family which occur in the northern and central parts of Europe and North America. In the Amazons region the shade-loving and semi-arboreal Odonto- cheilse outnumber in species the Cicindelse as twenty-two to six. AH but one of this number are exclusively peculiar to the Amazonian forests, aud this aftbrds another proof of the adapta- tion of the fauna to a forest-clad country, pointing to a long and uninterrupted existence of land covered by forests on this part of the earth's surface." Excepting that these South American species prefer the foliage to the ground, their habits are much the same as those of the ordinary Tiger Beetles. They prey upon other insects, and are able to catch even the swift-winged flies by pouncing on them as they settle on the leaves. I have seen the com- mon green shore-crab catch bees and flies in a similar fig. 5.— odontoeheiia de Gandu. manner, watching them as they ^^^*''^ ^'^'^ ^^""^^ ^^^^ alight on the sand, and fliyging itseK on them before they could re-open their just-furled wings. The name Odontoeheiia is formed from two Greek words signifying " toothed lip/' and is given to this genus in conse- quence of the form of the upper lip, which is rather long and toothed. The colour of this insect is very conspicuous. Most of the species are green, blue, or brown, but this little Beetle is shining metallic crimson bronzed with green, so that it blazes out like a red star amidst its duller companions. There is a small S-like white mark on the elytra. We now come to a most extraordinary group of Tiger Beetles called Collyridaj, in which the whole body is elongated, and the head and thorax are drawn out into a definite neck. One of these Beetles, named Hierates lahiata, is a native of the Ke Islands, in the Malay Archipelago. Its colour is deep purple-black glossed with green, and its ** labium" or upper lip is very conspicuous, being broad, and of a bright yellow t2 INSECTS ABROAD. colour. It is owing to this peculiarity of the labium that the insect has gained the specific name of labiata. Its habits are rather peculiar. Unlike our own Tiger Beetles, which are notable for their love of bright sunny spots, this Therates, though in the climate of the Ke Islands it might have as much sunshine as it liked, prefers damp and gloomy situa- tions. Yet, even in these localities it displays the well-known characteristics of the Tiger Beetle, running and flying restlessly from spot to spot with a fussy eagerness, and evidently on the look-out for prey as it darts from leaf to leaf, and then quickly scurries over the broad foliage. As is the case with our common Musk Beetle, its presence ♦nay be detected by the nostril before the eye can take cogni- zance of it. It gives out a powerful and pleasant odour some- thing like that of roses, which Mr. Wallace conjectures to be used for the purpose of decoying the insects on which it feeds. I very much doubt, however, whether this can be the case. I have already shown that odours which are disagreeable to us are not necessarily so to other beings, and therefore that we ought not to assume that they are used for the purpose of protection. By parity of reasoning, though an odovir may be grateful to us, it does not follow that it should be equally grateful to other beings ; and I therefore find much difficulty in believing that one Beetle repels its foes by an odour which is disagreeable to man, and that another attracts its prey by an odour which is pleasant to him. Mr. Wallace, to whom I am indebted for the foregoing infor- mation, remarks that in the forests of the Ke Islands, this and another Tiger Beetle, Tricondyla aptera, which will be presently described, were the only two common and conspicuous insects. The name Therates is a Greek word signifying " a hunter," and is very appropriately given to these quick, active Beetles, which Ej^parently spend their whole time in the chase. It is rather remarkable that the only two common insects in the forest should be not only Tiger Beetles, but even belong to the same family, the Collyridse. The name of the second species is Tricondyla aptera, and, according to Mr. AVallace's descrip- tion, it looks when alive very much like a large black ant, about an inch in length. At first sight it appears to be quite black. THE TRICONDYLA. 23 but a closer inspection shows that the black is, in fact, a very deep purple. It has no wings, as indeed is implied by its name " aptera," i.e. wingless, but its swiftness and quickness of foot compensate for its inability to fly. It is mostly found on trees, but it seems to prefer the trunks and branches to the foliage. Like our common creeper, the squirrel, and other tree-loving creatures, the Tri- condyla has a habit of dodging behind the branches when approached, and, if the intending captor goes round the tree, the Tricondyla goes round also, and is so adroit in keeping the tree between itself and its enemy, that it can only be captured by a sudden run and quick snatch of the fingers. Like most of its kin, the Tricondyla emits a strong odour, which is, however, not at all pleasant, but bears some resemblance to the well-known and very repulsive odour of the cockroach. A very good example of these rurinns Tiger Beetles is given in the accompanying illus- tration, which represents Collyris acrolia, an ex- ample of the typical genus. Its colour is the deep- est indigo, so deep that at first sight it looks black, just like the colour of our familiar Oil Beetle. The long thorax of this insect is boldly curved, and is globular in the middle. The creature has no wings, and the elytra are firmly soldered together to the very end of the body, as is often the case with wingless Beetles. The name Collyris refers to this structure, being composed of two Greek words signifying *' glued tail." There are many species of Collyris, all very much alike in colour and general form, and all having the otherwise small head boldly developed on either side, so as to leave room for the large and prominent eyes. Fig. 6. — CoHjtis acrolia. (Deep indigo.) This is the last of the Tiger Beetles of which description can be given. They are, however, so numerous and so important 24 INSECTS ABROAD. that they must not be disuiissed without a few parting words. On a review of British and foreign insects, we cannot but be struck with some remarkable phenomena. It might naturally be expected that the insects of tropical climates very far sur- pass in number and beauty those which inhabit the temperate zones. And, in comparing the insects of a tiny island like England with those of the vast tract which lies within the tropical belt, it is but natural to suppose that the disproportion of territory would be represented by an equal disproportion in the number, size, and beauty of the insect tribes. In a certain degree this theory is carried out by fact, but there are cases where it entirely fails, as we shall presently see. With the Tiger Beetles, however, the increase in the number of species is commensurate with the area of surface. In England we have but seven species of Tiger Beetle, all belonging to the typical genus, Cicindela. Several of them are very rare, and the most jjlentiful species, common though it may be, is seldom seen except by professed entomologists, who know where to look for it. The reason is evident enough. Agriculture does not agree with the Tiger Beetle, and, when cultivation comes in, the Beetle goes out. There is no help for it, and the consequence is, that in places where the lovely beetles used to flash their blue and green armour in the sunbeams, like living sapphires and emeralds, as long as the land remained uncultivated, not a single specimen can now be seen, and the Tiger Beetle has been forced ignominiously to resign its place to the turnip-fly and the cabbage caterpillar. No Tiger Beetle can exist in cultivated ground. They all love loose sandy soils, in which their burrows can be made without the likelihood of disturbance. Some prefer the sea- shore, and others the sandy, sheltered banks of inland districts. But in no case does a Tiger Beetle larva make its burrow in cultivated land. Its instinct teaches it to avoid such localities ; and, if any adventurous individual did choose a garden or a corn- field, it would have no chance of attaining maturity, inasmuch as its burrow would be repeatedly filled up by the gardener or the labourer, and the insect starved before it could get its tunnel USE OF THE TIGER BEETLES. 25 into working order. All caruivorous creatures require a con- stant supply of nourishment. The internal fire led by animal fuel burns fast and fiercely, so that a Tiger Beetle larva would die of hunger through a temporary deprivation of food which would little affect the turnip grub or the cabbage caterpillar. Then, Tiger Beetles cannot exist in cold countries, because they could not obtain the needful supply of insect food. But when, as in the great tropical belts of the world, they find vast tracts of uncultivated land swarming with insect life, it is evident that all the surroundings are favourable to their de- velopment, and that therefore they may be expected to increase and multiply to the very utmost. Their mission is evidently twofold. As carnivorous insects, they form part of the "balance-wheel" of creation whicli has already been mentioned ; and, as burrowing larvae, they aid in developing the power of the soil. Not only do they drill the surface of the earth with their perpendicular tunnels, thus admitting the light, air, and moisture on which the fertility of the soil so much depends, but they leave at the bottom of tlie burrows the rejected portions of the insects which they liave slain and eaten, together with the whole of their own refuse, and therefore manure as well as lighten the ground. In culti- vated land both these duties are performed by human labour, and the spade, the fork, and the plough do the work which was formerly left to the Tiger Beetles. The work being done, the Beetles are needless, and so perish from off a soil on which they have no duties to perform. Though the indirect services which they render to man are thus evident, their direct services have scarcely been acknow- ledged. Yet there is at least one species which is nsed by man, though its use is very limited. This is a Mexican species called Cicindela curvata, which has a way of burrowing in moist sand. The natives have an idea that, like the Cantharis, or " Spanish fly," with which we are all familiar, it possesses medicinal properties, and so they prepare an infusion of the Beetles either in water or spirits. I am not aware that any other species of Tiger Beetle has been in any way utilized by man. On seeing a fair collection of these insects, the most super- ficial observer must be struck w^ith their marvellous beauty of form and colour. Even when placed in formal rows in a ^6 INSECTS ABROAD. cabinet, and disfigured by the graceless and lifeless attitudes in wliicb entomologists will persist in setting all insects, without the least reference to their habits when living, they never fail to command attention even from those who know nothing of insects. Excepting the dull-coloured Phteoxanthas, which have already been mentioned, the Tiger Beetles seem to concentrate in them- selves every beauty of the insect race. Their colours are so brilliant as almost to pain the human eye. Flashes of the most resplendent azure, crimson, gold, emerald, purple, and every shade of every colour, meet the eye as it glances over the insects, and one which is not quite so dazzling as the others gives quite a sense of repose. There is, for example, one species, a native of Madagascar, which would when taken by itself command admi- ration. Its name is Eurymorplia cyanipes, and its colour is to the naked eye deep, dull green, except on the thorax, which is covered with a quantity of long snowy white hair. It is rather remarkable, on looking over the collection in the British Museum, how the eye finds itself instinctively resting on this insect, the cool green and white giving a feeling of repose to the sense of sight, which becomes absolutely fatigued with the gor- geous hues which meet it on every side. Should any of my readers be a classical scholar and not an entomologist, he will probably be much surprised, and a little scandalized, that the name of Cicindela is applied to these Beetles. If we turn to the old classic authors, we shall find that the word Cicindela was originally used as the name of the glow-worm, and was probably applied to any luminous insect. Unfortunately, the earlier entomologists, when they first began their formidable task of classifying the insect tribes, fell into various errors regarding the relationships of the different groups. One of these mistakes was made by Linnaeus, who considered the glow-worm to be related to the Blister Beetle, and so gave it the name of Cantharis, while to the Tiger Beetles he applied the name of Cicindela, which by right belongs to the gIo\\- worm. Subsequently he corrected several such errors, but persisted in retaining the name of Cicindela for the Tigei Beetles, and the result has been that, entomologically, the name NOMENCLATUKK. 27 -of Cicindela is now applied to the Tiger Beetle, and that of Ijampyris to the glow-worm. As to the arrangement of this large and important group of insects, there have been, and are still, many conflicting opinions. Some entomologists divide them into a number of distinct families, while others gather them all into one family under the common name of Cicindelidte, but subdivide that rather unwieldy family into a number of tribes. I certainly think that the latter plan is the most in accordance with zoological i'act, and I have therefore followed it in this work. CHAPTEK III. GROUND BEETLES, OR CARABIDjE. This great family of Beetles is quite equal in importance to the preceding, but in one point of view it presents a curious contrast to the Cicindelidse. In England we possess but very few Tiger Beetles, none of them being brilliantly coloured, whereas the exotic Tiger Beetles outnumber ours by some twenty times, and exhibit a brilliancy and variety of colouring which none of the English varieties possess. Our seven little soberly-clad species look very insig- nificant beside the array of exotic Cicindelidse, with all their flashing suits of azure, green, gold, and crimson. But when we come to the Carabidse, the case is nearly reversed. None of the tropical countries can produce any species that can surpass our familiar violet Ground Beetle, and the handsomest of all the foreign Carabidse is one that is a comparatively near neighbour of ours, being an inhabitant of Italy. Altogether, some three thousand species are known to entomologists, so that we can only select a few of the most conspicuous examples. ' The first is called Procerus tauricus, and lives, as its specific name implies, on the banks of the Bosphorus. It is an example of the genus to which belong the largest and handsomest speci- mens of this family, and which have been separated from the rest, not on account of their size, but on account of the structure of their feet. In the generality of the Carabi, the joints of the front tarsi are flattened and widened in the males, while they are cylindrical in the females. The Beetles, however, of which we are treating, have the joints cylindrical in both sexes, and they are on that account grouped together in tlie genus called Procerus. This word is Greek, signifying " a herald," and is given THE ADONIS BEETLE. 29 the Proceri because they are, so to speak, the heralds or tore- runuers of the true Carabi. The accent, by the way, is laid on the second syllable, thus, Procerus. This fine insect measures about two inches in length, and at first sight looks rough and black. All specimens indeed are black on the under surface, and some are black entirely. But many, such as the specimen from which the drawing is taken, are of the richest violet, with a tendency to purple, and a greenish sheen round the edges of the thorax and elytra. The whole of the upper surface is deeply and largely granulated and punctured, this structure giving increased richness to the . splendid violet and purple with which it is adorned. Fig. 7. — Procerus tauricus. (Deep purple.) It will be seen, on reference to the illustra,tion, that the pro- jecting tubercles which are formed of the granulations are arranged in nearly regular longitudinal rows, as is the case with several of our own Ground Beetles. This insect is spread over the eastern and southern parts of Europe, the Caucasus, and Asia Minor. It does not seem to flourish near the sea, and is found in best condition on the mountainous districts. We now take an example of the typical genus, the singularly beautiful Carabus Adonis, an insect which well deserves its name, 30 INSECTS ABROAD. being both elegant in shape and splendid in colour. Moreover, its chief residence is Mount Parnassus. Indeed, so gorgeous is the colouring, that it really looks like a tropical insect. As is often the case with Ground Beetles, this insect is exceedingly variable both in size and details of colour. Some specimens are scarcely as large as our common violet Ground Beetle, while others are fully twice as large. Then, the hues with which the body is adorned are equally variable. Usually, however, the middle of the body and elytra are deep black, which melts almost imperceptibly into green bronze, becoming fiery red along the edges of the thorax and elytra, the former of Fig. S. — Carabus Adonis. (Bronze-green, reil edges.) which is much flattened on the outer edges. In some specimens the whole of the thorax is bronze. There is, I believe, scarcely one species of Carabus which does not develop colour of some kind, and such colours are invariably deep and metallic, so deep, indeed, that unless ex- amined closely and with a favourable light, they really seem to be black. A good collection of Carabi is quite as splendid a sight as one of Tiger Beetles, and it is interesting to compare the two families, and see how differently the same colours can be developed. The very same hues of blue, green, gold, bronze, violet, purple, and crimson, which are found in the Tiger Beetles, are also found in the Carabi, the principal distinction being, that in the former insects the colours all have a vel- vety or satiny aspect, while in the latter they are shining like polished metal. ODOlfR OF INSECTS. 31 All these insects are carnivorous, and possess the power of emitting a very strong odour when handled or alarmed. This odour is not sweet and flower-like, as is the case with most of the Tiger Beetles, but is very foetid, repulsive, and persistent, so that it clings tightly to the fingers of anyone who incautiously seizes a Carabus with the hand. If, however, the insect be smartly grasped across the body, just as one picks up a live lobster or crayfish, the fingers are quite safe, and the Beetle may discharge its red-brown evil-smelling liquid as much as it pleases without injuring its coptor. All British entomologists are familiar with the splendid but rare Beetle, the Calosom.a sycophanta, with its glittering green and gold elytra, and deep purple head and thorax. The larv?e of this genus of Beetles feed upon the larvas of other insects, mostly those of social moths, and are wonderfully voracious, so that if two of them happen to meet, one is sure to devour the other. It is rather a remarkable fact, that of all the Calosomas our British species is by far the most splendid. There is one Australian species, Calosoma McLcayii, which has similar colours, though not nearly so brilliant. As to the others, they are no- where in the race for splendour of colour, and look quite dull and dingy beside the British species. Fig. 9. — Calosoma Indicum. f Brown, with burnished gol^l punctiircs.) There is, however, one exception, namely, Calosoma Indicum, which requires a quick eye to see that it is an ex(^eption, for the Beetle appears at first sight to be plain chocolate brown. If we louk at the British insect, we shall see that among the distin- 32 INSECTS ABROAD. guishing marks are three rows of deep punctures on each of the elytra, the punctures being placed on the fourth, eighth, and twelfth stride, or fine ridges, which run parallei to each other along the whole length of the elytra. In this Beetle the punc- tures, although their sides are polished and glittering, are of the same hue as the rest of the elytra. There are similar punctures in Calosoma Indicum, but the elytra are deep chocolate brown, while the punctures are not only polished and glittering, but shine with a golden lustre ; in fact, they look as if each punc- ture had been lined with gold leaf, and then burnished to a mirror-like brightness. In some lights these punctures are not seen, and it is scarcely possible with any arrangement of light to see the polished gold on both sides at once. In order to show this peculiarity, the artist has drawn the insect in such a manner that the glittering points are visible on one side, but not on the otlier. When I first saw these remarkable points, I thought that they must be lined with separate scales, like those of the weevils, but the magnif}dng glass soon showed that these punctures were simply gold-coloured and burnished. The whole of the upper surface of this Beetle is very finely granulated in distinct rows, the stride, or ridges, being broken up by innumerable transverse depres- sions. As its name implies, this Beetle is a native of India. The tribe of Cychrides comes next in order. In England we have but one species of this family, namely, Cychrus rostratus, a Beetle which looks so like a weevil that it is often mistaken for one of these insects. All the Cychrides have their elytra fused together, and the last joint of the labial and maxillary palpi large, flat, triangular, and hollowed underneath. The jaws, or mandibles, are strong, project boldly in front of the head, and are toothed on their interior edges. The most curious of these insects is Damastcr Uaptoidcs, a rare Japanese Beetle, which is here represented of its natural size. In this genus the mandibles have only one tooth, and that a large one, situated near the base. Each of the elytra is drawn out to a point at the end, and as they gape a little at their tips, the pointed ends are very conspicuous. Altogether, the Beetle gives an idea of having been once a stout insect, but drawn out when soft, so that it is feeble in comparison with its bulk. A VALTJABLl-: CAPTURE. 33 Its limbs, together Avilli its mode of walking, strengthen the idea ; for instead of being, as most of the Ground Beetles are, quick, brisk, and active, it is slow and sluggish, crawling rather than running, even when it finds itself in danger. FtG. 10. — Damaster Maptoides. (Dull blaok.) The following lively description of the capture of a Damaster is taken from Mr. Fortune's " Visits to Japan and China." It is part of a letter addressed from Dr. Adams to Mr. Fortune : — " I was walking solitarily — for all hands had gone on board to dinner — along the shell-strewn strand of Taleu-Sima, a jolly little island, not far from the shores of Niphon — walking along in a brown study, smoking a little clay cutty-pipe, and thinking chiefly of the contempt in which I should bo held if some of my ' very particular' friends saw me in this very disreputable ' rig,' for my neck was bare, and my coat was an old blue serge ; and as for my hat, it was brown felt, and I must say * a shocking bad one.' However, the sun was bright, the clear blue rippling sea was calm, the little island was clear and verdurous, and I smoked serenely. On a sudden my abstract downward gaze encountered a grotesque Coleopteron, in a sidt of black, stalking slowly and deliberately among the drift-wood at my feet — step- ping cautiously over the spillacan twigs. At once I knew my Coleopterous friend to be Damaster hkiptoidcs ; for although D 34 INSECTS ABROAD. my eyes are small, yet I have been assm-ed by a young lady friend of mine — sometimes irreverently called Polly— that they are penetrating ; and my friend Adam White, wlien he warned me not to forget my ' Carabs,' had sent me a rough outline of the ' corpus ' of Damaster. So I carefully lifted my unresisting sable friend from his native soil, and after giving him a good long stare, I deposited him in a bottle. From his name and appearance I judge him to be cousin to Blaps, and I turned over the rockwood for his brothers and other relations ; but though Helops was there, Damaster was not. Puzzled, but not baffled, I conceived his taste was more particular, so I ascended the steep green sides of the island, and cast about for rotten trees ; nor was I long in discovering a very pro- mising stump, nicely decayed, and full of holes enough to captivate the heart of any Beetle. Being, however, fatigued with my scansorial efforts, I sat down before the citadel of Damaster, and assisted my deliberations by smoking a solemn pipe. Having propitiated Nicotiana, and matured my plan of operations, I commenced the work ^f destruction, when, lo ! among the vegetable debris I descried a long dusky leg, anon two more, and then, buried among the ruins, the struggling Damaster. " In this manner was the rarest Beetle known captured by a wandering disciple of yEsculapius and an eccentric Fellow of the Linntean Society." The colour of this insect is dull, dead black, and, botli in general contour and in hue, it bears so great a resemblance to the well-known Churchyard Beetles (Blaps), that the sj^ecific name of hla])toidcs, i.e. like the Blaps, has been given to it. Since the above-mentioned letter was written, many other speci- mens of this curious Beetle have been taken, so that it is not now nearly so rare as it was then. Many more ti-avellers visit Japan than was the case thirteen years ago, and the habits of the insect are better known. The second example of the Cychridse belongs to the typical genus, and is named Cychrus vidua. The shape of this Beetle is singularly elegant, as can be seen from the illustration. It is a native of North America. Both in shaj^e and colour it presents a very decided contrast to its 150MBAJIDIEK BKKTLKS. ;^5 relative, the Damaster, for its outlines are all gracelul, and its colour peculiarly intense. The hue of this Beetle is the deepest IMU'ple-violet, the colour beincj almost painfully splendid in a hvilliant light. The thorax has more blue in it tlian the elytra, wliich are deeply and rather coar-^ely granulated in longitudinrd lines, so as to add to the vividness of the purple. On looking at this Beetle from above, it seems to be a very bulky one ; but when viewed sideways, its body is seen to be curiously flat, the depth being apparently quite disproportionate to the width. The object of this structure is evidently to enable the Beetle to creep beneath stones, under bark, and so to hide itself where a stouter insect could not enter. The spe- F'o- n.-cychrus vidua. . ., . -_ . (Deep pitrple.) cinc name vidua is Latni (the "vidder" of ]\Ir. Wellcr), and has been given to the insect on account of the very dark colour of its surface. It has already been mentioned that the Carabidpe have the power of ejecting a noisome liquid when alarmed. Both from the mouth and the tail proceeds this weapon of defence, and in some of the species this latter liquid is so volatile, that wlien it comes into contact with the air it explodes with a slight report, leaving a cloud of thin smoke. This is specially the case M'iih the tribe of Brachinides, of which our little Bombardier Beetle {Brachinus crepitans) is a familiar example. These Beetles are very social, and it is said that at least a thousand have been seen gathered under a single fiat stone near the river's brink. On being disturbed they at once begin to eject the explosive liquid, and a smart fusillade is kept up for some time. I remember that at one time schoolboys were in the habit of amusing themselves during the winter evenings by scattering coarse grains of gunpowder very thinly along the bars of the fire, and then waiting for them to explode singly. The little explosions of the Bombardier Beetles are exceedingly like those of the grains of powder, and, like gunpowder used in war, are D 2 "^ 36 I'^rSECTS ABROAD. inteuded to be employed against au enemy. The foe iu question is generally one of the larger Carabidaj, which would soon devour the small and helpless Brachinus were it not deterred by the repeated explosions and clouds of blue vapour that issue from its expected prey. The fluid and the apparatus which secretes it have been carefully investigated by M. Leon Dufour. Like most internal organs, tlie secreting apparatus is double, one on either side of the abdomen. M. Dufour describes the organ as consisting of two distinct portions, one being the "preparatory organ" in which it is secreted, and the other the " conservatory organ," in which it is reserved until wanted. The actual secreting organs are two slender fibres, which are in fact glands in their earliest condition, and which open into the preparatory organ just as the secreting organs of the bee or wasp open into the poison-bag. The preparatory organ of the Brachinus assumes two very different aspects, according to its degree of contraction or ex- pansion. When contracted, it is a soft, round, opaque, wdiitish body, situated under the last rings of the abdomen. When expanded, it becomes oblong, translucent, filled with air, and occupying nearly the full length of the abdomen. The reservoir, or conservatory organ, does not alter its shape, but is always small, globular, reddish-brown, tough in texture, hollow in the inside, and placed within the last ring of the abdomen. Both sexes possess this apparatus. As to the fluid itself, it is capable of staining the human skin black, and that so deeply that the stain remains for several days. Mr. Westwood, in his " Modern Classification of Insects," gives the following anecdote, which was narrated to him by the celebrated African traveller. Burchell : — " While resting for the night on the bank of one of the large South American rivers, he went out M'ith a lantern to make an astronomical observation, accompanied by one of his black servant boys ; and, as they were proceeding, their attention was directed to numerous Beetles running about upon the shore, which, when captured, proved to be specimens of a large species of Brachinus. On being seized, they immediately began to play oft" their artillery, biirning and staining the flesh to such a degree that only a few specimens could be captured with the THE EXPLOSm