398 



Index 



Heteroptera, 1 86-191. 



Hind-body, 30-31. 



Hind-gut, 65, 93, 96, 97. 



Hippoboscids, 267, 



HisteridsE, 210. 



Histolysis, 122. 



Hoiometabolous insects, 116, 164. 



Homology of segments in Arthro- 

 pods, 372. 



Homoptera, 192-7. 



Honey-dew, 70. 



Hood of maxilla, 13. 



Household insects, 281-2. 



Hybrids, 147-8. 



Hydrometridz, 188, 289, 295. 



Hydrophilidje, 209. 



Hydropsychidi, 227. 



Hydroptilidff, 227. 



Hymenoptera, 161, 164, 268-280, 

 330-7, 361-3. 



Hypermetamorphosis, iio-ii. 



Hypoblast. See Endoderm. 



Hypodermis, 5. 



Hypolimnas, 321-3. 



Hypopharynx, 15. 



HypsidsE, 240. 



Iapygids:, 169. 

 lassidse, 195. 



Ichneumon - flies, 273-4, 307 ; 

 poison-glands, 70 ; kidney tubes, 



Imaginal buds, 122. 



Imago, 115 ; formation of, 121-2 ; 



emergence, I 22-3 ; life of, 124-5. 

 Incomplete metamorphosis, 115- 



116. 

 Incomplete pupa;, 119. 

 Indusium, 92-3. 

 Inheritance of acquired characters, 



145-6. 

 Injurious insects, 341-2. 

 Inquilines, 310. 

 Instar, 115. 

 Intestine, 64. 

 Intercrossing, 147-9. 

 Isolation, 148. 

 IthomiinjE, 250, 323. 



Jaws, 10-19 ; classification by, 164. 

 Jugum, 225, 229 



Kallima, 317. 



Kidney-tubes, 71-2 ; development 

 of, 96 ; classification by, 164. 



LABmuRA, 171. 



Labium, 15. 



Labrum, 6. 



Lace-wing flies, 204-5 '■> kidney- 

 tubes, 71 ; hatching, loi ; larvs, 

 106, 305 -f pupx, 1 18. 



Lacinia, 13. 



Laciniata, 156. 



Ladybird Beetles, 2 10- 1 1, 305, 341. 



Lagriidi, 221. 



LampyridsE, 218. 



Larvje, 103-114 ; reproduction by, 

 126; aquatic, 1 12-14, 291-4; 

 nature of, 356-7. 



Lasiocampidse, 238. 



Lathridiid^, 213. 



Leaf-cutting ants, 336; bees, 330. 



Leaf-insects, 175, 316. 



Legs, 22-26 ; muscles of, 52; im- 

 aginal buds of, 1 22. 



Lemoniida;, 247. 



Lepidoptera, 156, 163, 227-250, 

 360-1. See also Moths. 



LepismidsE, 170. 



Leptids, 260. 



Leptocerids, 227. 



LibellulidsE, 201. 



Libytheids, 247-8. 



Lice, 191-192. 



Life-history, importance of, 346. 



Ligula, 16. 



Limacodidae, 233. 



Limbs of arthropods, 2. 



LimnephilidsE, 227. 



Lingua, 15. 



LiotheidsE, 179. 



LiparidjE. See Lymantriidz. 



Lipura, 166, 168. 



Lobster compared with insects, 2. 



Locustid^, 175, 353. 



Locusts, 175 ; legs, 25 ; ears, 45 ; 



