INDEX 



Abdomen, 30-1, 78-9, 94. 

 Abdominal limbs, 93-4, 168, 345, 



364- 37-- 

 Aberration, 134. 



Abnormal feeding of insects, 310. 

 Abundance of insects, 281-5. 

 Acalypters, 266. 

 Accessory glands, 82. 

 Acherontia, 311. 

 Acquired characters, 145-6. 

 Acraeini, 250, 320. 

 Acridiids. See Locustidas. 

 Aculeata, 270. 

 ^olothripidae, 184. 

 Aepophilus, 295. 

 Aepus, 295. 

 Agaristida;, 241. 



Age (geological) of insects, 375-8. 

 Agrionidi, 202. 



Air-tubes, 57-9 ; in embryo, 94. 

 Alary muscles, 55. 

 Alder-flies, 203; larvje, 112. 

 Aleyrodidz, 196. 

 Alimentary canal. Sfe Food-canal. 

 Alucitidi. See Orneodids. 

 Amnion, 91-3. 96 ; rupture of, loi. 

 Annelids, 373-4. 

 Anoplura, 191-2. 

 Antenna. See Feelers. 

 Anthicids, 223. 

 Anthocorinae, 190. 

 Anthomyidz, 266. 

 Anthribids, 223. 

 Ant-lions, 203. 

 Ants, 276-7 ; taste-organs, 49 ; 



kidney-tubes, 71; sting, 77-8; 



pupar. 118; social communities, 



335-7; fossil, 363. 



Anurida, embryo of, 92. 



Anus, 31. 



Aorta, 55. 



Aphaniptera, 253-5. SeealsoFleas. 



Aphids, 195, 337, 355. See also 



Plantlice. 

 Aptdz, 279-80. See also Bees. 

 Apodemes, 21, 52. 

 Appendages, of head, 7 ; of thorax, 



22;of abdomen, 78-9; homology 



of, 372. 

 Apterygogenea, 164. 

 Aquatic insects. See Water-insects. 

 Arachnids compared with Insects, 



367-9. 

 Aradida;, 188. 

 Arctiidae, 240. 

 Arthropods, i, 363-76. 

 AscalaphidsE, 203-4. 

 Asilids, 260, 363. 

 Assembling of Moths. 327-8. 

 Atavic variation. 140. 



BaL/\ncers of flies, 46. 250. 



Bark-beetles, 224, 302-3. 



Bark-lice. See Scale-insects. 



Bees, 279-80; jaws, 12, 14, 17; 

 thorax, 22; legs, 24-5; wings, 

 28 ; nerve-centres, 33 ; air-tubes, 

 59; food-canal, 67; glands and 

 stings, 69-70, 78 ; kidney-tubes, 

 71; ovaries, 75; parthenogenesis, 

 88-9; larva, 109; pupa. 118; 

 imaginal buds, 122 ; social com- 

 munities, 330-5 ; economic value, 

 342-3 ; fossils, 363. 



Beetles, 206-25 ; feelers, 10 ; jaws, 

 12, 13. 16; thorax, 22; wings, 

 393 



