Index 



395 



Cicindelids, 207. 



Cimicidas, 189-90. 



Circulation of blood, 56. 



Cissid^, 219. 



Cistelidas, 221. 



Claspers, 82. 



Classification, 128-36, 149-64. 



Clavus, 187. 



Claws, 24, 26. 



Cleridz, 218-19. 



Clothes-motiis, 235-6, 312. 



Clunio, 37, 295. 



Clypeus, 6. 



Coccidae, 196-7. See also Scale- 

 insects. 



Coccineilidx, 210-11. 



Cockroach, structure of, 3 ; head, 

 5-6; feelers, 9; jaws, 10, 13, 

 15; neck, 19; thorax, 20-21; 

 legs, 22-4 ; wings, 27-9 ; ab- 

 domen, 30-1; nerves, 31-6; 

 sense-organs, 36, 48-9; muscles, 

 50-3 ; blood-system, 54-6 ; air- 

 tubes, 57-61 ; food-canal, 61-6 ; 

 glands, 67-70 ; kidney-tubes, 

 71 ; reproductive organs, 72- 

 82; eggs, 84-5; embryo, 94- 

 100; hatching, loo-i ; classifica- 

 tion, 157, 173-4; fossils, 353. 



Cocoon, 119-20, 124. 



Coelom, 97-9. 



Coleoptera, 161, 163, 206-25, 358- 

 60. See also Beetles. 



CoUembola, 161, 162, 165-8, 

 346-8,371. 5i;i?a/xo Springtails. 



CoUeterial gland, 75. 



Colour, 315-28. 



Colon, 64. 



ColydiidjE, 212. 



Compound eyes, 37. 



Congenital variation, 137. 



Conglobate gland, 8 1 . 



Coniopterygida;, 205. 



Conopidje, 263-4. 



Coreids, 187-8, 355. 



Corium, 187. 



Corixida;, 191. 



Cornea, 36-7. 



Correlation, 144. 



Corrodentia, 179-82. 



Corylophids, 210. 



Cosmia, 311. 



CossidjE, 234. 



Costa of wing, 26. 



Courtship, 325-6. 



Coxa, 22. 



Craneflies, 258 ; legs, 25 ; eyes, 39. 



Crayfish, 372. 



Crickets, 1 76 ; cercopods, 3 ! ; 

 ears, 43-5. 



Crops ravaged by insects, 340-1. 



Crown of head, 6. 



Crustacea, 369-71. 



Cryptophagids, 213. 



Crystalline cone, 37. 



Cubital nervures, 27, 229, 252. 



Cuckoo-parasites, 310. 



Cuckoo-spit, 195, 314. 



CucujidEE, 212. 



CulicidsE, 258. See also Gnats. 



Cuneus, 187. 



CurculionidJE, 223-4. 



Cyaniris, 150-1. 



Cyclorrhapha, 262-8. 



Cymatophorids. See Thyatirids. 



Cynipids, 273. See also Gall- 

 flies. 



Danain^e, 250, 320. 

 Darwinian theory, 140-7. 

 Dascillidx, 218. 

 Definite variation, 146-7. 

 Degeneration. 25, 308-10, 345. 

 Dermaptera, 162, 170-2, 348-9. 



See also Earwigs. 

 Dermestidje, 214. 

 Deutocerebron, 36, 93. 

 Devonian insects, 355. 

 DexinsE, 266. 

 Digestion, 66. 



Digging-wasps, 277-79, 330-'- 

 DioptidsE, 242. 

 Diplopoda, 366-7. 

 Diptera, 161, 163, 250-68, 361-3. 



See also Flies. 

 Directive cells, 86. 



