Page:Descent of Man 1875.djvu/698

682

* Todas, infanticide and proportion of sexes, 255; practise polyandry, 593; choice of husbands amongst, 593.
 * Toe, great, condition of, in the human embryo, 11.
 * Tomicus villosus proportion of the sexes in, 253.
 * Tomtit, blue, sexual difference of colour in the, 458.
 * Tonga Islands, beardlessness of the natives of, 560, 581.
 * Tooke, Horne, on language, 86.
 * Tools, flint, 145; used by monkeys, 81; use of, 48.
 * Topknots in birds, 384.
 * Tortoise, voice of the male, 567,
 * Tortures, submitted to by American savages, 118.
 * Totanus, double moult in, 390.
 * Toucans, colours and nidification of the, 455; beaks and ceres of the, 491.
 * Towns, residence in, a cause of diminished stature, 31.
 * Toynbee, J., on the external shell of the ear in man, 14.
 * Trachea, convoluted and imbedded in the sternum, in some birds, 374; structure of the, in Rhynchœa, 476.
 * Trades, affecting the form of the skull, 56.
 * Tragelaphus, sexual differences of colour in, 535.
 * scriptus, dorsal crest of, 530; markings of, 543, 544.
 * Tragopan, 220; swelling of the wattles of the male, during courtship, 383; display of plumage by the male, 397; markings of the sexes of the, 428.
 * Tragops dispar, sexual difference in the colour of, 351.
 * Training, effect of, on the mental difference between the sexes of man, 565.
 * Transfer of male characters to female birds, 470.
 * Transmission, equal, of ornamental characters, to both sexes in mammals, 542.
 * Traps, avoidance of, by animals, 80; use of, 48.
 * Treachery, to comrades, avoidance of, by savages, 111
 * Tremex columbœ, 292.
 * Tribes, extinct, 128; extinction of, 182.
 * Trichius, difference of colour in the sexes of a species of, 294.
 * Trigla, 347.
 * Trimen, R., on the proportion of the sexes in South African butterflies, 250; on the attraction of males by the female of Lasiocampa quercus, 252; on Pneumora, 288; on difference of colour in the sexes of beetles, 294; on moths brilliantly coloured beneath, 315; on mimicry in butterflies, 325; on Gynanisa Isis, and on the ocellated spots of Lepidoptera, 428; on Cyllo Leda, 429.
 * Tringa, sexes and young of, 485.
 * cornuta, 391.
 * Triphœna, coloration of the species of, 313.
 * Tristram, H. B., on unhealthy districts in North Africa, 194; on the habits of the chaffinch in Palestine, 248; on the birds of the Sahara, 456; on the animals inhabiting the Sahara, 489.
 * Triton cristatus, 348.
 * palmipes, 348.
 * punctatus, 348.
 * Troglodyte skulls, greater than those of modern Frenchmen, 55.
 * Troglodytes vulgaris, 473.
 * Trogons, colours and nidification of the, 455, 456.
 * Tropic-birds, white only when mature, 492.
 * Tropics, freshwater fishes of the, 343.
 * Trout, proportion of the sexes in, 249; male, pugnacity of the, 332.
 * Trox sabulosus, stridulation of, 303.
 * Truth, not rare between members of the same tribe, 118; more highly appreciated by certain tribes, 122.
 * Tulloch, Major, on the immunity of the negro from certain fevers, 193.
 * Tumbler, almond, change of plumage in the, 238.
 * Turdus merula, 455; young of, 487.
 * migratorius, 464.
 * musicus, 455.
 * polyglottus, young of, 487.
 * torquatus, 455