INDEX 



An asterisk * denotes an illustration. 



Abdomen, 65 ; appendages of, *6~, 

 *i5o, *i52; extremity, 68; modifica- 

 tions, 66 ; segments, 65 



Acacia, ^272, 273 



Accessory glands, *i4O, *i4i, *i42 



Achorutes, *g, 10 



Acquired characters, 243 



Acridiidae, *io, n ; moults of, 165; 

 spiracles, 66 



Acridium, 27 ; respiratory muscles of, 

 *I39 



Aculeata, 21 



Adams, on dispersal, 383 



Adaptations, of larvae, 165 ; of legs, 51, 

 *53 ; of mandibles, 37, *38 ; origin 

 of, 237 ; protective, 297 



Adaptive coloration, 216; classifica- 

 tion, 234 ; evolution, 236 ; variation, 

 241 



Adelung, von, 428 



Adler, 418, 454 



Adventitious resemblance, 219 



Ageronia, 104 



Aggressive resemblance, 235 



Aerionidae, caudal gills of, *i34 



Air-sacs, 133 



Alary muscles, *i25 



Albinism, 201 



Alexander, 450 



Alimentary tract (see Digestive Sys- 

 tem). 



Alluring coloration, 235 



Alternation of generations, 256 



Amans, 417, 445 



Amber insects, 385, 389 



Ametabola, 159 



Ammophila, *36o, 363 



Amnion, *i48, 149. *i53 



Amphidasis, 199 



Amphimixis, 243 



Amphipyra, 347 



Ampullaceum, *95, 96 



Anajapyx, *6, 22 



Anal glands, 81, *ii7 



Anasa, *is8 



Androconia, *79, 80 



Anemotropism, 347 



Anergates, 336 



Angrcecum, 262 



Anisota, ^171 



Anisotropic, 87 



Annelids, in relation to arthropods, 

 5, *7 



Anomma, 335 



Anopheles, 302, 303 



Anophthalmus , 114 



Anosia berenice, 380 ; plexippus, an- 

 tenna of, *34 ; dispersal, 369 ; eclo- 

 sion, 172; so-called mandibles, 41; 

 mimicked, *224, 232 ; pupa, *i68 ; 

 pupation, 168 ; scale, *77 ; wing, 

 *6o 



Antecoxal piece, *49 



Antennae, forms of, *34 ; functions of, 

 34 ; sexual differences in, *35 



Antennal comb, *27o, 271 ; neuromere, 

 *46 ; segment, 45 ; sensilla, 94, *95 



Anthonomus, 397 



Anthrax, 306 



Anthrenus, *77 



Antigeny, 35, 205 



Ant-plants, *272 



Ants, castes of, 330; color sense, 114; 

 facets, 32 ; general account, 330 ; 

 habits, 333 ; harvesting ants, 340 ; 

 honey ants, 336, *337 ; hunting ants, 

 335: larvae, 331; leaf-cutting, 337, 

 *338 ; nests, 331 ; slave-making, 336 



Anurida, development of mouth parts, 

 *i5i ; germ band, *iso ; habits, 191 ; 

 pigment, 197 



Anus, *72, 121 



Aorta, *i25, *i26 



Apanteles, 310, *3ii 



Apatetic colors, 234 



Apatura, scales, 193 ; colors, 195 



Aphaniptera, 19, *2i 



Aphidius, 310 



Aphids, galls of, *255 ; in relation to 

 ants, 341 



Apis mellifera, antennal sensilla, *95 ; 

 cephalic glands, 122 ; comb, *322 ; 

 control of sex, 327 ; determination 

 of caste, 327 ; foot, *54 ; general 

 account, 321 ; hair, *26g ; larvae, 

 *324 ; legs, *27o ; mandible, *38 ; 

 mimicry, 225 ; modifications in rela- 

 tion to flowers, *27o, 271 ; moults, 



467 



