INDEX 



275 



Digestive system of butterfly, 55, 56 



of caterpillar, 55, 59-60 



of dragon-fly, 42, 47 



of dragon-fly larva, 46 



of grasshopper, 22 



of mayfly, 92 

 Digging-wasp, 227-8 



parental care, 237 

 Diplopoda, 175 

 Diptera, 185-6, 255 



larvae, 126-36, 152, igo-203 



parasitic, 163-7, 22I ~3 



primitive types, 269 



pupa, 139, 259, 261 



puparium, 132, I43~4> l6 4< 



279, 220 



Disease-carriers, 199, 215-16 

 Dor-beetle. See " Geotrupes 

 Dragon-fly, 2, 39-52 



larva, 42-52 



See also " Odonata " 

 Drone-bee/3o 



Drone-fly. See " Eristalis " 

 Drosophila, 167 

 Duct, ejaculatory, 27 



of salivary gland, 23 



of silk gland, 59, 60 

 Dunstantiidae, 266 

 Dyticus, larva, 101-2, 260 



EARWIG, maternal care, 235 



tongue, ii 



See also " Dermaptera " 

 Ecdysis 7 



of Aleyrodes, 86, 87-8 



of aphid, 76 



of caterpillar, 61 



of dragon-fly, 46, 51 



of grasshopper, 34-5, 37 

 Ectoderm, 31 

 Egg, 27, 29 



of Aleyrodes, 86, 87 



of flea, 161, 162 



of locust, 33 



of louse, 156 



of Termitoxeniidae, 166 

 Egg-laying, Chironomus, 190 



dragon-fly, 41, 42 



gnat, 195 



grasshopper,"33 



mayfly, 93 

 Elateridae, 

 Elytron, 99 

 Embryo, 28 

 Endopterygota, 66, 98-154, 182-7 



phytogeny, 255-61, 266-70 



wing development, 152-4 

 Environment, 188, 233-4 

 Ephemeroptera, 181, 204, 253, 258 



See also " Mayfly '- 



19 



Erastria, 229-30 

 Eristalis, larva, 201-2 

 Eugereon, 265 

 Euproctis, 231 

 Evolution, 244, 261-70 

 Excretory tubes, 23 



of butterfly, 56 



of grasshopper, 23 



of muscoid maggot, 135 

 Exopterygota, 66, 67-97, 177-82 



phylogeny, 261-6 

 Exoskeleton, 7 

 Eye, compound, 9 



simple, 39 



of caterpillar, 57 



of ground-beetle larva, too 



of mayfly, 91 



of saw-fly larva, 125 



of spring-tail, 171 



FAMILY life of Insects, 234-43 

 Feeler, 9 



of aphid, 74, 75 



of Bibio larva, 128 



of bristle-tail, 170 



of butterfly, 53 



of capsid bug, 77, 79 



of caterpillar, 57 



of Chironomus larva, 190 



of dragon-fly larva, 44 



of flea, 162 



of grasshopper, 9 



of ground-beetle larva, 100 



of Helodes larva, 105 



of longhorn-beetle larva, 113 



of mayfly and larva, 91-3 



of moth, 53 



of Psychopsis larva, 119, 121 



of saw-fly larva, 125 



of Sialis larva, 118 



of Silpha larva, 106 



of spring-tail, 171 



of Thrips, 83-5 



of Tipula larva, 130 



of weevil larva, 114 

 Fenusa, 203 

 Fertilization, 30 

 Flea, larva, 16 1, 162 



pupa, 161, 163 



See also " Aphaniptera " 

 Flea-beetle. See " Halticinae," 



" Phyllotreta " 

 Flesh-fly, 216 

 Forest-fly, 163 

 Forficula. See " Earwig " 

 Fossil insects, 262-70 

 Fungus-midge, 215 



GALLS, PLANT, 209-11 

 Gall-fly, 210-n 



