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* B. Pernyi reared by, 253; on the development of Bombyx cynthia and B. yamamai, 278; on the pairing of Bombyx cynthia, 318.
 * Wallace, A. R., on the origin of man, 3; on the power of imitation in man, 68; on the use of missiles by the orang, 82; on the varying appreciation of truth among different tribes, 122; on the limits of natural selection in man, 49, 127; on the occurrence of remorse among savages, 131; on the effects of natural selection on civilised nations, 133; on the use of the convergence of the hair at the elbow in the orang, 151; on the contrast in the characters of the Malays and Papuans, 168; on the line of separation between the Papuans and Malays, 169; on the birds of paradise, 219; on the sexes of Ornithoptera Crœsus, 250; on protective resemblances, 261; on the relativesizes of the sexes of insects, 278; on Elaphomyia, 280; on the pugnacity of the males of Leptorhynchus angustatus, 299; on sounds produced by Euchirus longimanus, 304; on the colours of Diadema, 309; on Kallima, 311; on the protective colouring of moths, 313; on bright coloraration as protective in butterflies, 314; on variability in the Papilionidæ, 320; on male and female butterflies inhabiting different stations, 321; on the protective nature of the dull colouring of female butterflies, 321, 322, 325; on mimicry in butterflies, 324; on the bright colours of caterpillars, 325; on brightly-coloured fishes frequenting reefs, 343; on the coral snakes, 353; on Paradisea apoda, 385; on the display of plumage by male birds of paradise, 395; on assemblies of birds of paradise, 405; on the instability of the ocellated spots inHipparchia Janira, 428; on sexually limited inheritance, 444; on the sexual coloration of birds, 452, 472, 473, 475, 480; on the relation between the colours and nidification of birds, 452,455; on the coloration of the Cotingidæ, 460; on the females of Paradisea apoda and papuana, 470; on the incubation of the cassowary, 478; on protective coloration in birds, 489; on the Babirusa, 519; on the markings of the tiger, 545; on the beards of the Papuans, 560; on the hair of the Papuans, 575; on the distribution of hair on the human body, 600.
 * Walrus, development of the nictitating membrane in the, 17; tusks of the, 502, 507; use of the tusks by the, 513.
 * Walsh, B. D., on the proportion of the sexes in Papilio Turnus, 250; on the Cynipidæ and Cecidomyidæ, 254; on the jaws of Ammophila, 275; on Corydalis cornatus, 275; on the prehensile organs of male insects, 275; on the antennæ of Penthe, 275; on the caudal appendages of dragon-flies, 276; on Platyphyllum concavum, 286; on the sexes of the Ephemeridæ, 289; on the difference of colour in the sexes of Spectrum femoratum, 289; on sexes of dragon-flies, 290; on the difference of the sexes in the Ichneumonidæ, 292; on the sexes of Orsodacna atra, 294; on the variation of the horns of the male Phanæus carnifex, 297; on the coloration of the species of Anthocharis, 312.
 * Wapiti, battles of, 501; traces of horns in the female, 504; attacking a man, 511; crest of the male, 531; sexual difference in the colour of the, 536.
 * Warbler, hedge-, 473; young of the, 481.
 * Warblers, superb, nidification of, 454.
 * Wariness, acquired by animals, 80.
 * Warington, R., on the habits of the stickle-backs, 331, 345; on the brilliant colours of the male stickle-back during the breeding season, 340.
 * Wart-hog, tusks and pads of the, 519.
 * Watchmakers, short-sighted, 33.
 * Waterhen, 360.
 * Waterhouse, C. O., on blind beetles, 294; on difference of colour in the sexes of beetles, 294.
 * , G. R., on the voice of Hylobates agilis, 567.