500 



INDEX 



Thomas, 424, 427 



Thompson, C. B., 443, 468 



Thompson, S. M., 463 



Thorax, differentiation of, 44; parts of, *45; 

 sclerites of, *45, * 4 6, * 4 y 



Thread-press, *y6 



Thyridopteryx, eggs of, 141 



Thysanoptera, *i4, 15; origin of, 23, *25 



Thysanura, 8, *g\ abdominal segments, 60; 

 primitive, 20 



Thysanuriform, 24, *i42, *i43, 160 



Tibia, 48, *4Q 



Tiger beetles (see Cicindelidaf) . 



Tillyard, 438, 476 



Tipula, *2o 



Titanophasnta, 27 



Toad, insectivorous, 236 



Tongue, 37 



Torre-Bueno, 475 



Touch, 84 



Tower, D. G., 437 



Tower, W. L., on color patterns, 186; 

 cuticular colors, 175; distribution of 

 Leptinotarsa, 336; folding of wing, 56, 

 *57; hibernation, 365; integument, 

 *67; origin of wings, 53; structural 

 colors, 173; 441, 459, 472 



Townsend, A. B., 448 



Townsend, C. H. T., 426 . 



Toxoptera graminum, development of, 356, 

 364; distribution of, 368 



Toyama, 451 



Tracheae, development of, 135, *i36; dis- 

 tribution, *ii7, *u8; structure, *i2i 



Tracheal gills, *n8, 169 



Tracheation, types of, 117 



Tracheoles, *i2i, 122 



Trelease, 462 



Tremex, *ig 



Trench fever, 268 



Triassic insects, 345 



Trichius, 225 



Trichodeum, 84, *8s 



Trichogen, *68, 69^71 



Tricho gramma, 274 



Trichoptera, 18, "17; origin of, *25; silk 

 glands, 77 



Trichopterygidae, size of, 27^ 273 



Trimen, on dispersal, 323; on P. ccnea, 202, 

 205; 459, 460 



Trimerotropis, protective resemblance of, 

 196, *i97 



Trimorphism, 180 



Triphleps, egg of, *i39 



Tritocerebrum, 80, 135 



Triungulin, 156, *i57 



Trochanter, 48, *49, 50 



Trochantin, 48 



Trogoderma, 377 



Trop&a luna, cocoon of, 148 



Trophallaxis, 301 



Tropical region, 335 



Tropidacris, 27; respiratory muscles of, *i 23 



Tropisms, 302 



Trouessart, 471 



Trouvelot, on cocoon-spinning, 151; eclo- 



sion, 152; larval growth, 144; 453 

 Trypanosomes, 261, *262, *264 

 Trypanosomiases, 261, 263, 264 

 Tryphtsna, 176 

 Tsetse fly, 262, * 2 6^ 

 Tuberculosis, 269 

 Turner, 101, 445 

 Tutt, 472 



Typhoid fever, 257 

 Typhus, 266 



Uhler, on distribution, 337 



Uichanco, 358 



Underbill, 464 



Urech, 457, 458 



Uric acid, 108; as a pigment, 175 



Urosternite, 60 



Urotergite, 60 



Useful insects, 411 



Utricularia, 217 



Uzel, 453 



Vagina, 125, "126 



Valette St. George, la, 450 



Vanessa, development of scales of, *7i; head 

 of butterfly, *4o; antiopa: 246; photo- 

 tropism, 309; atalanta: color change, 

 190; cardui: dispersion, 322, 326; geo- 

 graphical variation, 328; polychloros: 

 coloration, 179; melanism, 180; urtica: 

 coloration, 176; melanism, 180; tem- 

 perature experiments, 183 



Variation in coloration, 188, *i9i, "192 



Variations, 190 



Vas deferens, *i24 



Vayssiere, 447, 449, 455 



Vedalia (see Novius). 



Vegetation map of U. S., *39i 



