INDEX 



An asterisk * denotes an illustration. 



Abdomen, 51; appendages of, *53, *i2i, 

 *i22; extremity, 54; modifications, 52; 

 segments, 52 



Acacia, *2i2 



Accessory glands, *ii3, *ii4 



Acerentomon, 5 



Ac ho rules, *8 



Acridiidae, *8; moults of, 133; spiracles, 52 



Acridium, 21; respiratory muscles of, *ii2 



Aculeata, 17 



Adams, on dispersal, 317, 384 



Adaptations, of larvae, 133; of legs, 40, *42; 

 of mandibles, 29, *3o; protective, 231 



Adaptive coloration, 178; classification, 193; 

 evolution, 194 



Adelung, von, 355 



Adler, 347, 375 



Adventitious resemblance, 180 



Aedes, 241 



Ageronia, 83 



Aggressive resemblance, 193 



Agrionidae, caudal gills of, *iO9 



Air-sacs, 107 



Alary muscles, *ioo 



Albinism, 165 



Alexander, 373 



Alimentary tract (see Digestive System) 



Allard, 356 



Alluring coloration, 194 



Alternation of generations, 199 



Amans, 346, 369 



Amber insects, 319, 322 



Ametabola, 127 



Ammophila, *295, 297 



Amnion, 120, *i24 



Amphidasis, 163 



Amphipyra, 284 



Ampullaceum, *75 



Anajapyx, *s, 17 



Anal glands, 65, *94 



Anasa, *i2'j 



Androconia, *63 



Anemotropism, 285 



A tier gatks, 276 



Angr&cum, 203 



Anisota, *i4o 



Anisotropic, 69 



Annelids, in relation to arthropods, 4, *6 



Anomma, 275 



Anopheles, 236, 237 



Anophthalmus, 91 



Anosia berenice, 315; plexippus, antenna of, 

 *26; dispersal, 303; eclosion, 140; so-called 

 mandibles, 33; mimicked, *i84, 191; pupa, 

 "135; pupation, 135; scale, *6i; wing, *47 



Antecoxal piece, *39 



Antennas, forms of, *26; functions of, 27; 

 sexual differences in, *27 



Antennal comb, *2io, 211; neuromere, *36; 

 segment, 36; sensilla, 75, *76 



Anthonomus, 328 



Anthrax, 252 



Anthrenus, *6i 



Antigeny, 28, 169 



Ant-plants, *2i2 



Ants, castes of, 271; color sense, 91; facets, 

 25; general account, 271; habits, 273; 

 harvesting ants, 279; honey ants, 276, 

 *277; hunting ants, 275; larvae, 272; leaf- 

 cutting, *277; nests, 272; slavemaking, 276 



Anurida, development of mouth parts, *i2i; 

 germ band, *i2i; habits, 157; pigment, 162 



Anus, *57, 96 



Aorta, *ioo, *ioi 



Apanteles, 255, *2s6 



Apatetic colors, 193 



Apatura, scales, 159; colors, 161 



Aphaniptera, 15, *i7 



Aphidius, 255 



Aphids, galls of, *i97; in relation to ants, 280 



Apis mellifera, antennal sensilla, *76; cepha- 

 lic glands, 97; comb, *265; control of sex, 

 269; determination of caste, 269; foot, *43; 

 general account, 264; hair, *2O9; larvae, 

 *266; legs, *2io; mandible, *3o; mimicry, 

 *i85; modifications in relation to flowers, 

 *2io; moults, 133; mouth parts, *35; 

 ocellus, *87; ovipositor, *56; reproductive 

 system, *ii5; tongue, *77; wax, *65, *26$ 



Apneustic, 107, 155 



Apodemes, *4o 



Apodous larvae, 37, 43 



Apophyses, *4o 



Aporus, 297 



Appendages, development of, * 120 



Apple, insects of, 195 



Aptera, 6 



Apterygota, 8 



Aquatic insects, adaptations of, 152; food, 

 152; locomotion, 153; origin, 158; respira- 

 tion, 155; systematic position, 152 



Arachnida, *2 



Arctic realm, 309 



Arista, *26 



Aristida, 279 



Arms, J. M., 340, 368 



Army worm, 317 



Arthropoda, characters of, *i; classes, 2; 

 interrelationships, 4; naturalness of phy- 

 lum, 6; phylogeny, *6 



387 



