468 



INDEX 



Excretion, 6, 3S 



Exopterygota, 176, 309, 3io-:^i3, 



329, 33^-334 

 Exoskelcton, 2 

 Extinct insects, 336-345 

 Eyes, 83-87 



Factors in inheritance, 122-136 



of evolution, 349-378 

 l-'amily life, 200-217 

 I'at, digestion of, 30 ; absorption, 



36-37 



rat-body, 37 



Feeding, 5-6, 16-37, 381-395 

 I'ertilisation, 115-117 

 Filaria and Culex, 436 

 Fishes preying on insects, 397 

 Flagellata in insects, 409-410 

 Flattening of insects, 268-271 

 Fleas, leaping, 53 ; compression, 



271 ; carriers of plague 



bacillus, 436-437 

 Flight, 54-61 

 Flour-beetles, 425 

 Flowers and insects, 394-395, 445 

 Food, influence of change, 364 

 Fore-gut, 5, 23-28, 154 

 Forficula, jaws, 17-19 ; maternal 



care, 210 

 Formica fusca and F. sanguinea, I 



245-246 ; 



Formicidae, 320 I 



Fossil insects, 336-345 i 



Fruits and insects, 445 | 



Fungal parasites of insects, 396-397 } 

 Fungus-gardens of ants, 239 ; of ] 

 termites, 257 I 



Furniture beetles, 427 



Galls, of Pontania on willo\\ , 364- 

 365, 388 ; of Cynipidae, 385- 

 387 ; of Cecidomyidac, 3SS 



Gainasus coleopterorum, 415 



Gametes, 10, 115-141 



Ganglion, 7, 71 



Genital armature, 146-147 



Geographical distribution, 263-267 ; 

 isolation, 378 



Geotrupes typhaeus, egg-laying, 

 209-210 



Germ-cells, 10, 115-141, 359-361 



Germ-plasm theory, 359-361 



Germ-track, 359 



Gerris, 281-182 



Gills, 45, 277 



Gizzard, 25 



Glossina morsitans, 411, 4^:9 ; pal- 

 palis, 429 



Cjolgi-bodies, 137 



Gordius in aquatic insects, 408-409 



Grasshoppers, leaping, 53 ; body- 

 form, 270-271 



Greenfly. See Aphidae. 



Gregarines, 409 



Growth, 10, 160-161 



Guests, of ants, 248-253 ; of 

 termites, 259-260 



G-uUet, 23-25 



Gynandromorphs, 131-136 



Gyrinus, 274 



IlAiins, changes in, 1 11-11 3, 3O4- 



365 

 Haemocoel, 6, 155 

 Haemoglobin, 45 

 Haemonia curtisi, 286 

 Haemosporidia in insects, 412-413, 



431-433 

 Hairs, 8, 71-73 

 Halirytus amphibius, 289 

 Halobates, 295-298 

 Harvestmg ants, 242-243 

 Hatching, 159-160 

 Hearing, organs of, 78-82 

 Heart, 6, 34 

 Heliconinae, 371-372 

 Hemimetabolous insects, 333 

 Hemiptera, jaws, 21-23, 65- 



67 ; sperm-cells, 126-127 ; 



aquatic, 281-282 ; marine, 



293-298 ; characters, 312- 



313; geological history, 339- 



340 . 

 Hepialus pairing, 201, 203 

 Heredity, 121, 350-357 

 Heteroneura, 316, 341 

 Heteroptera, 312, 340 

 Hibernation, 299-300 

 Hind-gut, 5, 30-32, J 54 

 Hippoboscidae, 405 

 Histogenesis and Histolysis, 175 

 Holometabolous insects, 333 

 Homoneura, 316, 341 

 Flomoptera, 312-313, 340 

 Honey, forn^.ation, 27-28 ; as bees' 



food, 225 ; ants' food, 241 ; 



human food, 441-442 

 Honey-dew as ants' food, 32, 241- 



242 



