484 INDEX 
wings, 57; structural colors, 194; 
423, 449, 463 
Toyama, 438 
Trachee, development of, 153, *1553 
distribution, *132, *133; structure, 
"137 
Tracheal gills, *134, *135, 190 
Tracheation, types of, 134 
Trelease, 454 
Tremex, *21 
Triassic insects, 388 
Trichius, 268 
Trichodeum, 94, *95 
Trichogramma, 313 
Trichoptera, 17, *18; origin of, 24, 
*25; silk glands, 85 
Trichopterygide, size of, 27, 311 
Trimen, on dispersal, 367; on P. 
merope, 226, 228; 450, 451 
Trimerotropis, protective resemblance 
of, 219 
Trimorphism, 202 
Triphleps, egg of, *159 
Tritocerebrum, 91, 152 
Triungulin, 174, *175 
drochanter, -40, +51, 752; +53 
Trochantine, 51 
Tropea luna, cocoon of, 170 
Tropical region, 377 
Tropisms, 345 
Trouessart, 462 
Trouvelot, on cocoon-spinning, 170; 
eclosion, 172; larval growth, 164; 
442 
Tryphena, 197 
Tsetse fly, 276 
Tutt, 463 
Typhoid fever, 305 
Uhler, on distribution, 380 
Urech, 447, 448, 449 
Uric acid, 124; as a pigment, 196 
Utricularia, 257 
Uzel, 442 
Vagina, 140, *141, *142 
Valette St. George, la, 437 
Vanessa, development of scales of, 
*79; head of butterfly, *42; antiopa, 
298; phototropism, 353; atalanta, 
color change, 214; cardui, disper- 
sion, 366, 371; geographical varia- 
tion, 373; polychloros, coloration, 
200; melanism, 201; urtice, colora- 
tion, 196, 200; melanism, 201; tem- 
perature experiments, 205 
Variation in coloration, 211, *212, 
20 
Variations, blastogenic, 243; classes 
of, 214, 241; congenital, 243; en- 
vironmental, 242; functional, 242 
Vas deferens, *140, 141 
Vayssi€re, 432, 435, 445 
Vedalia (see Novius ) 
Veins, 58 
Velum, *270 
Venation, 58, *59, *60, *61 
Ventral sinus, 126, *139 
Ventral tube, *68 
Ventriculus, *118 
Verhoeff, 418, 420, 458 
Verloren, 431 
Vernon, 450, 453 
Verson, 438 
Vertex, 30 
Verworn, on phototropism, 351; 460 
Vespa, nests of, 328, *329; olfactory 
organ, *r1oo; sensillum, *95; taste 
cups, *98; tongue, *97 
Vespide, 328 
Viallanes, 414, 425, 432, 435, 443 
Vision, 108 
Vitelline membrane, *146 
Vitreous body, *109 
Voeltzkow, 441 
Vogler, 435 
Volucella, mimicry by, *235; preda- 
ceous, 309 
Voss, 418 
Vries, de, mutation theory of, 247, 453 
Wagner, J., 412 
Wagner, N., 437 
Wahl, 444 
Walker, 445 
Walking, 56 
Wallace, on mimicry, 226; natural se- 
lection, 238; 450, 452, 461, 462 
Walsh, on losses through insects, 
394; 403 
Walter, on mouth parts, 42, 415 
Walton, on meron, 51, 417 
Warning coloration, 221 
Wasmann, on myrmecophilism, 340; 
458, 460, 461 
Wasps, 328 
Watase, 428 
Wax, glands, 83; pincers, *270, 271 
Webster, on dispersal, 368, 378, 381, 
382; losses through insects, 3094; 
405; 451, 454, 457, 462, 463 
Wedde, 415 
Weed, on birds in relation to insects, 
286. 287, 289, 291, 456 
Weinland, 428 
Weismann, on acquired characters, 
