Chafers, 52 Chapman, T.A., 81, 84 Chironomus, 43, 77, 87, 91 Chloeon, 33 Chrysalis, 82. _See also_ Pupa Chrysomelidae, 53. _See also_ Leaf-beetles Chrysopa, 57 Cicads, 22, 93, 110 Classification, 122 Clearwing Moths, 62 Click-beetles, 52, 93 Clothes-moths, 62 Coccidae, 20, 110, 118 Coccinella, 113 Cockroaches, 11, 14, 15, 107, 115 Cocoons, 82 Codling Moth, 62, 99 Coleoptera, 50-6, 80, 112, 119 Collembola, 11 Complete transformation, 35, 107, 119. _See also_ Endopterygota Corethra, 43 Cossus, 38, 62, 82, 95 Crane-flies, 67, 70, 93, 117 Cremaster, 83 Crustacea, 7, 120 Culex, 43, 77, 86 Curculionidae, 55 Cuticle, 2, 9, 29, 37, 40, 50, 81, 87, 110 Cynipidae, 94. _See also_ Gall-flies Daddy-long-legs, 69-70 Darwin, C., 105 Deegener, P., 6, 114 Devonian insects, 107 Dewitz, H., 28 Digestive system, 10, 45-7 _Diplosis pyrivora_, 70 Diptera, 42, 64, 67-79, 81, 86-8, 91, 94, 107 Divergence between larva and imago, 110, 114, 121 Double-brooded Lepidoptera, 95, 100-4 Dragon-flies, 26-31, 107, 110 Drone-flies, 76 Duration of life, 34, 89, 92-3, 95 Dyticus, 51 Ecdysis, 10. _See also_ Moult Ectoderm, 9, 11, 47 Eggar Moths, 59, 89 Eggs, 6, 17-18, 26, 34, 65-7, 71, 90, 94-5, 97 Elateridae, 52 Endopterygota, 41, 49, 108, 112, 115-6 Ephemeroptera, 24. _See also_ May-flies Epidermis, 9, 40 Eristalis, 76 Eruciform larvae, 56, 58-70, 111 Evolution, 16, 103, 105-21 Exopterygota, 41, 108, 115-6, 118 Exoskeleton, 9 Fabre, J.H., 56 Fat-body, 47 Feeding-period, 27, 32, 36, 89, 111 Feelers, 1, 4, 42, 71 Fleas, 116 Fore-gut, 47 Free pupa, 80 Gall-flies, 64-6, 94, 115 Gall-midges, 68-70, 90 Ganin, M., 66 _Gastrophilus equi_, 73-4 Gegenbaur, C., 120 Geological history, 106-8, 123 Geometridae, 59 Gills, 24, 27, 32, 78, 87, 114, 120 Glossinia, 91 Glow-worm, 50, 113 Gnats, 43, 77, 86 Goat Moth, 38, 62, 82, 95 Gonin, J., 38, 41 Grasshoppers, 11, 14, 15 Grimm, O., 90 Ground-beetles, 52, 112 Growth, 9 Grub, 63-70. _See also_ Caterpillar, Larva Hairs, 59, 82, 98 Hammond, A.R., 43, 77, 87 Handlirsch, A., 106 Harvey, William, 7 Hatchett-Jackson, W., 83 Hawk Moths, 60 Heart, 45 Helodes, 50 Hemerobius, 57 Hemimetabola, 35 Hemiptera, 17, 110 Henneguy, L.F., 45, 48 Heymons, R., 6, 11, 119 Hibernation. _See_ Wintering stages Hind-gut, 47 Hippoboscidae, 91 Histogenesis and Histolysis, 48 Holometabola, 35 House-fly, 67, 71, 73 Hover-flies, 74-6 Hymenoptera, 58, 64, 94, 107 Hypermetamorphosis, 56 _Hypoderma bovis_, 73-5 Hypodermis, 9 Ichneumon-flies, 64, 66, 82 Imaginal buds or discs, 34-48, 114, 117-8 Imago, 24, 34, 114 Instar, 13, 33, 56, 117-9 Jaws of imago and larva, 2, 4, 5, 32, 42, 89 Jurassic insects, 107 Kahle, W., 90 Kellogg, V.L., 108 Kowalevsky, A., 46 Labium, 2, 27 Lacewing-flies, 57, 107 Ladybirds, 113 Lameere, A., 111 Lampyris, 113 Larva, 4, 22, 26-7, 32, 49-79, 110-15 Larval reproduction, 90 Lasiocampidae, 59, 89 Latter, O.H., 28