INDEX 475 
Hydrous, tergites of, *48 
Hylastes, 381 
Hylobius, glandular hairs of, *8o 
Hymenoptera, defined, 19; cephalic 
glands, 122; eyes of sexes, *33; in- 
ternal metamorphosis, 182; mouth 
parts, *44; ocelli, 32; origin, 24; 
sounds, 103; wing, *61 
Hypermetamorphosis, 174 
Hyperparasitism, 311, 312 
Hyphe, 259 
Hyphantria, 208 
Hypoderma, larva of, *162; lineata, 
habits of, 278; losses through, 394 
Hypodermal colors, 194 
Hypodermis, *74, 75, *76, *79 
Hypognathous, 11 
Hypopharynx, *37, 39, *43 
Icerya, 406 
Ichneumonide, 310 
Ihering, von, 419 
Tleum, *120 
Imaginal buds, *179, *180 
Imago, 156 
Incomplete metamorphosis, 157 
Indirect metamorphosis, *156 
Ingenitzky, 438 
Inheritance of acquired characters, 243 
Injuries, transmission of, 241 
Injurious insects, 393; introduction 
of, 307 
Ino, antennal sensilla of, *95 
Inquilines, 256, 320 
Insecta, defined, 4 
Insectivorous birds, 284; fishes, 281; 
plants, 256; vertebrates, 280 
Inspiration, 139 
Instar, 159 
Instinct, 356; apparent rationality of, 
357; basis of, 357; flexibility, 360; 
inflexibility, 359; modifications, 358; 
origin, 361; stimuli, 357; and tro- 
pisms, 361 
Integument, 73 
Intelligence, 362 
Interactions of organisms, 292 
Intercalary, appendages, *150; neuro- 
mere, *46; segment, 45 
Interglacial beetles, 391 
Interrelations, of insects, 307; of 
orders, 21 
Intima, *85, *121, *137 
Iphiclides ajax, polymorphism of, 202 
Iridescence, 193 
Iris pigment, *rog, *r11 
Iris versicolor, *260, *261 
Irritants, 298 
Isaria, 258 
Ischnoptera, mouth parts of, *37 
Isia, cocoon of, 170; hairs, 76, 167; 
moults, 165 
Island faune, 371 
Isolation, 249, 374 
Isoptera, I1 
Tsosoma, 311 
Isotropic, 87 
Ithomiine, mimicry, 225, 226 
Jacobi, 463 
James, W., 459 
Janet, on Lepismina, *344; muscles, 
86, *87; 416, 420, 421, 424, 458 
Japyx, 9, 22; spiracles of, 66 
Jaworovski, 431 
Jennings, 460 
Judd, on food of bluebird, 287; mim- 
icry, 232; protective adaptations, 
297; protective resemblance, 221 ; 
warning coloration, 222; 451, 456 
Jurassic insects, 385, 389 
Kallima, 
216 
Kanthack, 456 
Karsten, 421 
Kathariner, 460 
Katydid, stridulation of, 106 
Kellogg, on Mallophaga, 277; mouth 
parts, 42; phototropism, 354; pili- 
fers, *42; scales, 78, 193; swarm- 
Ing, 8275) 410, ai4yean6. 407, 422. 
448, 453, 460 
Kenyon, 412, 425 
Kidney tubes, 123, *124 
Kingsley, on Arthropoda, 7, 411, 412 
Kirby, 410, 411 
Kirkland, 456 
Klemensiewicz, 422 
Kluge, 438 
Knuppel, 430 
Koch, on malaria, 302 
Kochi, 416 
Koestler, 425 
Kolbe, 410 
Kolliker, 424, 437 
Korotneff, 440 
Korschelt, 438, 441, 444 
Koschewnikoff, 438 
Kowalevsky, 430, 432, 439, 443 
Kraatz, 419 
Kraepelin, 415, 418 
Krancher, 435 
Krause’s membrane, *87, 88 
Krukenberg, on chitin, 74; 429, 447 
Kulagin, 42, 416, 442, 444 
protective resemblance of, 
