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680

* Suspicion, prevalence of, among animals, 69.
 * Swallow-tail butterfly, 312.
 * Swallows deserting their young, 108, 113.
 * Swan, black, wild, trachea of the, 374; white young of, 482; red beak of the, 491; black-necked, 493.
 * Swans, 491, 493; young, 481.
 * Swaysland, Mr., on the arrival of migratory birds, 212.
 * Swifts, migration of, 108.
 * Swinhoe, R., on the common rat in Formosa and China, 80; behaviour of lizards when caught, 355; on the sounds produced by the male hoopoe, 376; on Dicrurus macrocercus and the spoonbill, 461; on the young of Ardeola, 468; on the habits of Turnix, 476; on the habits of Rhynchœa bengalensis, 476; on Orioles breeding in immature plumage, 484.
 * Sylvia atricapilla, young of, 487.
 * cinerea, aerial love-dance of the male, 380
 * Sympathy, 134; among animals, 102; its supposed basis, 106.
 * Sympathies, gradual widening of, 123.
 * Syngnathous fishes, abdominal pouch in male, 163.
 * Sypheotides auritus, acuminated primaries of the male, 378; ear-tufts of, 384


 * Tabanidæ, habits of, 208.
 * Tadorna variegata, sexes and young of, 479.
 * vulpanser, 414.
 * Tahitians, 145; compression of the nose by the, 583.
 * Tail, rudimentary, occurrence of, in man, 22; convoluted body in the extremity of the, 23; absence of, in man and the higher apes, 58; variability of, in species of Macacus and in baboons, 58; presence of, in the early progenitors of man, 160; length of, in pheasants, 445, 451, 452; difference of length of the, in the two sexes of birds, 451.
 * Tait, Lawson, on the effects of natural selection on civilised nations, 133.
 * Tanager, scarlet, variation in the male, 424.
 * Tanagra œstiva, age of mature plumage in, 483.
 * rubra 424; young of, 487.
 * Tanais, absence of mouth in the males of some species of, 208; relations of the sexes in, 255; dimorphic males of a species of, 265.
 * Tankerville, Earl, on the battles of wild bulls, 501.
 * Tanysiptera, races of, determined from adult males, 468.
 * sylvia, long tail-feathers of, 451.
 * Taphroderes distortus, enlarged left mandible of the male, 277.
 * Tapirs, longitudinal stripes of young, 464, 546.
 * Tarsi, dilatation of front, in male beetles, 275.
 * Tarsius, 156.
 * Tasmania, half-castes killed by the natives of, 170.
 * Tasmanians, extinction of, 184.
 * Taste, in the Quadrumana, 541.
 * Tattooing, 178; universality of, 574.
 * Taylor, G., on Quiscalus major, 248.
 * Tea, fondness of monkeys for, 7.
 * Tear-sacks, of Ruminants, 529.
 * Teebay, Mr., on changes of plumage in spangled Hamburgh fowls, 229.
 * Teeth, rudimentary incisor, in Ruminants, 11; posterior molar, in man, 20; wisdom, 20; diversity of, 26; canine, in the early progenitors of man, 160; canine, of male mammals, 502; in man, reduced by correlation, 562; staining of the, 574; front, knocked out or filed by some savages, 575.
 * Tegetmeier, Mr., on the transmission of colours in pigeons by one sex alone, 231; numerical proportion of male and female births in dogs, 246; on the abundance of male pigeons, 247; on the wattles of game-cocks, 403; on the courtship of fowls, 417; on the loves of pigeons, 418; on dyed pigeons, 418; blue dragon pigeons, 446.
 * Tembeta, S. American ornament, 575.
 * Temper, in dogs and horses, inherited, 69.