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on the pugnacity of the males of a species of Tenthredinæ, 291; on the pugnacity of the male stag-beetle, 299;  on Bledius taurus and Siagonium, 299; on lamellicorn beetles, 301; on the coloration of Lithosia, 314.
 * Whale, Sperm-, battles of male, 500.
 * Whales, nakedness of, 56.
 * Whately, Archb., language not pe-culiar to man, 84; on the primitive civilisation of man, 143.
 * Whewell, Prof., on maternal affection, 70.
 * Whiskers, in monkeys, 150.
 * White, F. B., noise produced by Hylophila, 308.
 * , Gilbert, on the proportion of the sexes in the partridge, 248; on the house-cricket, 283; on the object of the song of birds, 369; on the finding of new mates by white owls, 408; on spring coveys of male partridges, 409.
 * Whiteness, a sexual ornament in some birds, 494; of mammals inhabiting snowy countries, 542.
 * White-throat, aerial love-dance of the male, 380.
 * Whitney, Prof., on the development of language, 86; language not indispensable for thought, 88.
 * Widow-bird, polygamous, 219; breeding plumage of the male, 392, 403; female, rejecting the unadorned male, 419.
 * Widows and widowers, mortality of, 140.
 * Wigeon, pairing with a pintail duck, 414.
 * Wilckens, Dr., on the modification of domestic animals in mountainous regions, 35; on a numerical relation between the hairs and excretory pores in sheep, 198.
 * Wilder, Dr. Burt, on the greater frequency of supernumerary digits in men than in women, 223.
 * Williams, on the marriage-customs of the Fijians, 599.
 * Wilson, Dr., on the conical heads of the natives of North-Western America, 583; on the Fijians, 583; on the persistence of the fashion of compressing the skull, 584.
 * Wing-spurs, 449.
 * Wings, diffferences of, in the two sexes of butterflies and Hymenoptera, 277; plav of. in the courtship of birds, 401.
 * Winter, change of colour of mammals in, 542.
 * Witchcraft, 96.
 * Wives, traces of the forcible capture of, 144.
 * Wolf, winter change of the, 542.
 * Wolff, on the variability of the viscera in man, 27.
 * Wollaston, T. V., on Eurygnathus, 277; on musical Curculionidæ, 301; on the stridulation of Acalles, 306,
 * Wolves learning to bark from dogs, 73; hunting in packs, 101.
 * , black, 540.
 * Wombat, black varieties of the, 539.
 * Women distinguished from men by male monkeys, 8; preponderance of, in numbers, 244; selection of, for beauty, 397; effects of selection of, in accordance with different standards of beauty, 584; practice of capturing, 589, 592; early betrothals and slavery of, 593; freedom of selection by, in savage tribes, 598.
 * Wonder, manifestations of, by animals, 71.
 * Wonder, Mr., on sexual peculiarities in the wings of butterflies, 277.
 * Wood, J., on muscular variations man, 26, 41, 43; on the greater variability of the muscles in men than in women, 223.
 * , T. W., on the colouring of the orange-tip butterfly, 313; on the habits of the Saturniidæ, 315; quarrels of chamæleons, 357; on the habits of Menura Alberti, 371; on Tetrao cupido, 371; on the display of plumage by male pheasants, 396; on the ocellated spots of the Argus pheasant, 441; on the habits of the female cassowary, 478.
 * Woodcock, coloration of the, 491.
 * Woodpecker, selection of a mate by the female, 416. Woodpeckers, 371; tapping of, 376; colours and nidification of the, 455, 458, 489; characters of young, 465, 474, 481.