728 



1XDEX 



Tergum, 87. 



Termen, 122. 



Termes, abdomen, 162; origin of wings 

 of, 140, 14:;. 



Termes rlavipes, 64. 



Termopsis, 48, 64. 



Testes, 487, 495; incipient eggs in the 

 germ of the testis, 504. 



Theory of incasement, <!41. 



Thomas, on origin of scent-scales, 199. 



Thorax, S6, 95 : gills on, 4(J8. 



Thread-plate, 575. 



Thread, spiral, 444; origin of, 447, 44<S. 



Thyridiuni, 124. 



Thyridopteryx. f>34. 



Thysanoplera, nymph of, 597. 



Thysaiuira, 72; cercopods of, 164; geni- 

 tal organs of, 486. 



Tibia, 9(1: formation of, in imago of Lepi- 

 doptera, 655. 



Tim-id larva, wing-buds of, 652; wing- 

 germs of, 129. 



Tipnla, 629; flight of, 151, 152; thorax 

 of, 91. 



Tissue, connective, 574. 



Tongue, 70. 



Tornlus, 57. 



Trachea-, 431, 442; capillary, 655 ; distri- 

 bution of, 432 ; end-cells, 437 ; hairs in, 

 451; moulting of, 612; origin of, 553; 

 origin of, in worms, 442; size of, 433; 

 of wings, 144. 



Tracheal gills, of adult insects, 476 ; rec- 

 tal, 4(i3. 



Tracheal system, amphipneustic type, 

 4(i'_' : apneustic type, 459; closed, 459: 

 holopneustic type, 459; metapneustic 

 type, 461 ; peripneustic type, 462; pro- 

 pneustic type, 462 ; reformation of, in 

 metamorphosis, 683. 



Tracheoles, 126, 653. 



Tract, optic, 253. 



Trajectory made by wings, 150. 



Tribolium. 617. 



Trichodes, tracks of, 110. 



Trichogen. iss. 199. 3(i<5. 



Trichoptera, 469 ; appendages, 550 ; de- 

 velopment of wings of, 142; embryol- 

 ogy of, 537 ; eversible glands of, 375 ; 

 haustellum of, 75 ; hvpopharynx of, 

 74; pupal jaws of, 63:.., spinneret, 74. 



Trilobita, 5. 



Tritocerebrum, 231, '237. 



Triunguline larva, 100, (593, 695. 



Trochanter, 49(5; divided, 97. 



Trocliantine, 95. 



Trogoderma, 617. 



Trophi. 54,59, 549. 



Trouvelot, on the moulting fluid, 610 : 

 process of moulting of Telea, 610: 

 .sjiinning of cocoon by Telea, C21. 



Trnxalis, 422. 



Tubercles, 1S7, 192. 



Tubes, egg, 501 ; ovarian, 501 ; urinary, 

 3Ki. 317, 34,s. :;:.:;, 572. 



Tympanum, 2S9. 

 Typhlocyba, 616. 



Uljanin, on the sexual cells of the honey 

 bee, 582. 



rngnes, 96. 



Uranidin, 206. 



Urates, ".52. 



Urea, 352. 



Urech, on pigments, 206, 208. 



I'ric acid. 352. 



Urinary bladder, 351: tubes, 316, 317. 

 34H; absent in Collcmhola, 353 ; excre- 

 tions of, 351 : origin of. 572. primitive 

 number of, 352; solid contents of, 352. 



Urine, 206. 



Trite, 163. 



Uromeres, 163. 



Uro-patagia, 183. 



Urosome, 163. 



Urosternites, 163. 



Uterus, 507. 



Utriculi, 487. 



Uzel, on the embryology of Campodea. 

 51, 53; premandibular segment in 

 Campodea, 51, 52. 



Vagina, 507. 



Valery-Mayet, on life-history of Sitaris, 



691. 



Vallisneri, on the cremaster, (537. 

 Valvnle, cardiac, 312; proventricular, 



313 ; pyloric, 315. 

 Van Hemmelen, on colors, 2<iS. 

 Vanessa antiopa, 638. 

 Vanessa io, :!,sl. 

 Vanessa urtica-, before pupation. 644: 



changes in nervous system during its 



metamorphosis, <!4<i. 

 Van Rees, on post-embryonic chan_ 



Muscidie. 673, (174, (17o, tiso. 6s:;, (1M. 

 Vas defei-eiis. 49(i : origin of, 579. 

 Vasa deferentia, 49(1; origin of, 579. 



