INDEX. 



667 



Thornback, difeerence in the teeth 

 of the two sexes of the, 331. 



Thoughts, control of, 119. 



Thrush, pairing with a blacltbird, 

 409; colors and nidifioation of 

 the, 449. 



Thrushes, characters of young, 

 449, 459. 



Thug, remorse of a, 114. 



Thumb, absence of, in Ateles and 

 Hylobates, 49. 



Thury, M., on the numerical pro- 

 portion of male and female 

 births among the Jews, 238. 



Thylacinus, possession of the 

 marsupial sack by the male, 157. 



Thysanura, 277. 



Tibia, dilated, of the male Crabro 

 cribrarius, 273. 



and femur, proportions of, in 



the Aymara Indians, 33. 



Tierra del Fuego, marriage-cus- 

 toms of, 592. 



Tiger, colors and markings of the, 

 540. 



Tigers, depopulation of districts 

 by, in India, 44. 



Tillus eloingatus, difference of 

 color in the sexes of, 291. 



Timidity, variability of, in the 

 same species, 67. 



Tincse, proportion of the sexes in, 

 245. 



Tipulffi, pugnacity of male, 278. 



Tits, sexual difference of color in, 

 451. 



Toads, 345; male, treatment of ova 

 by some, 158; male, ready to 

 breed before the female, 208. 



Todas, infanticide and proportion 

 of sexes, 252; practice polyandry, 

 588; choice of husbands amongst, 

 588. 



Toe, great, condition of. In the 

 human embryo, 11. 



Tomious villosus, proportion of 

 the sexes in, 250. 



Tomtit, blue, sexual difference of 

 color in the, 451. 



Tonga Islands, beardlessness of 

 the natives of, 555, 575. 



Tooke, Home, on language, 83. 



Tools, flint, 141; used by monkeys, 

 79; use of, 47. 



Topknots in birds, 377. 



Tortoise, voice of the male, 561. 



Tortures, submitted to by Amer- 

 ican savages, 115. 



Totanus, double moult in, 385. 



Toucans, colors and nidification 

 of the, 449; beaks and ceres of 

 the, 487. 



Towns, residence in, a cause of 

 diminished stature, 30. 



Toynbee, J., on the external shell 

 of the ear in man, 14. 



Trachea, convoluted and imbed- 

 ded in the sternum, in some 

 birds, 369; structure of the. In 

 Rhynchaea, 470. 



Trades, affecting the form of the 

 skull, 54. 



Tragelaphus, sexual differences of 

 color in, 530. 



scriptus, dorsal crest of, 526; 



markings of, 538, 539. 



Tragopan, 215; swelling of the 

 wattles of the male, during 

 courtship, 377; display of plu- 

 mage by the male, 391; markings 

 of the sexes of the, 422. 



Tragops dispar, sexual difference 

 in the color of, 347. 



Training, effect of, on the mental 

 difference between the sexes of 

 man, 560. 



Transfer of male characters to fe- 

 male birds, 465. 



Transmission, equal, of ornament- 

 al characters, to both sexes in 

 mammals, 537. 



Traps, avoidance of, by animals, 

 77; use of, 47. 



Treachery, to comrades, avoid- 

 ance of, by savages, 107. 



Tremex columbse, 289. 



Tribes, extinct, 125; extinction of, 

 178. 



Trichius, difference of color in the 

 sexes of a species of, 291. 



Trigla, 343. 



Trimen, R., on the proportion of 

 the sexes in South African but- 

 terflies, 246; on the attraction of 

 males by the female of Lasio- 

 campa quercus, 248; on Pneu- 

 mora, 284; on difference of color 

 in the sexes of beetles, 291; on 

 moths brilliantly colored be- 

 neath, 312; on mimicry in butter- 

 flies, 321; on Gynanisa Isis, and 

 on the ooellated spots of Lepi- 

 doptera, 422; on Cyllo L,eda, 423. 



Tringa, sexes and young of, 480. 



canutus, 386. 



Triphffina, coloration of the spe- 

 cies of, 310. 



Tristram, H. B., on unhealthy dis- 

 tricts in North Africa, 189; on 

 the habits of the chaflinch in 

 Palestine, 244; on the birds of 

 the Sahara, 450; on the animals 

 inhabiting the Sahara, 485. 



Triton cristatus, 344. 



palmipes, 344. 



punctatus, 345. 



Troglodyte skulls, greater than 



those of modern Frenchmen, 53. 

 Troglodytes vulgaris, 467. 

 Trogons, colors and nidiflcation of 



the, 449, 450. 

 Tropio-birds, white only when 



mature, 488. 

 Tropics, freshwater fishes of the, 



399. 

 Trout, proportion of the sexes in, 



245; male, pugnacity of the, 328. 

 Trox sabulosus, stridulation of, 



300. 



