on the sexes of the Ephemeridae;
on the difference of colour in the sexes of Spectrum femoratum;
on sexes of dragon-flies;
on the difference of the sexes in the Ichneumonidae;
on the sexes of Orsodacna atra;
on the variation of the horns of the male Phanaeas carnifex;
on the coloration of the species of Anthocharis.
Wapiti, battles of;
traces of horns in the female;
attacking a man;
crest of the male;
sexual difference in the colour of the.
young of the.
Warblers, superb, nidification of.
Wariness, acquired by animals.
Warington, R., on the habits of the stickleback;
on the brilliant colours of the male stickleback during the breeding
Wart-hog, tusks and pads of the.
Waterhouse, C.O., on blind beetles;
on difference of colour in the sexes of beetles.
Waterhouse, G.R., on the voice of Hylobates agilis.
Water-ouzel, autumn song of the.
Waterton, C., on the Bell-bird;
on the pairing of a Canada goose with a Bernicle gander;
on hares fighting.
Wattles, disadvantageous to male birds in fighting.
Weale, J., Mansel, on a South African caterpillar.
Wealth, influence of.
Weapons, used by man;
employed by monkeys;
offensive, of males;
Weaver-birds, rattling of the wings of;
Webb, Dr., on the wisdom teeth.
Wedderburn, Mr., assembly of black game.
Wedgwood, Hensleigh, on the origin of language.
Weevils, sexual difference in length of snout in some.
Weir, Harrison, on the numerical proportion of the sexes in pigs and
on the sexes of young pigeons;
on the songs of birds;
on the dislike of blue pigeons to other coloured varieties;
on the desertion of their mates by female pigeons.
Weir, J. Jenner, on the nightingale and blackcap;
on the relative sexual maturity of male birds;
on female pigeons deserting a feeble mate;
on three starlings frequenting the same nest;
on the proportion of the sexes in Machetes pugnax and other birds;
on the coloration of the Triphaenae;
on the rejection of certain caterpillars by birds;
on sexual differences of the beak in the goldfinch;
on a piping bullfinch;
on the object of the nightingale's song;
on the pugnacity of male fine-plumaged birds;
on the courtship of birds;
on the finding of new mates by Peregrine falcons and Kestrels;
on the bullfinch and starling;
on the cause of birds remaining unpaired;
on starlings and parrots living in triplets;
on recognition of colour by birds;
on hybrid birds;
on the selection of a greenfinch by a female canary;
on a case of rivalry of female bullfinches;
on the maturity of the golden pheasant.
Weisbach, Dr., measurement of men of different races;
on the greater variability of men than of women;
on the relative proportions of the body in the sexes of different races of
Weismann, Prof., colours of Lycaenae.
Welcker, M., on brachycephaly and dolichocephaly;
on sexual differences in the skull in man.
Wells, Dr., on the immunity of coloured races from certain poisons.
Westring, on the stridulation of males of Theridion;
on the stridulation of Reduvius personatus;
on the stridulation of beetles;
on the stridulation of Omaloplia brunnea;
on the stridulating organs of the Coleoptera;
on sounds produced by Cychrus.
Westropp, H.M., on reason in a bear;
on the prevalence of certain forms of ornamentation.
Westwood, J.O., on the classification of the Hymenoptera;
on the Culicidae and Tabanidae;
on a Hymenopterous parasite with a sedentary male;
on the proportions of the sexes in Lucanus cervus and Siagonium;
on the absence of ocelli in female Mutillidae;
on the jaws of Ammophila;
on the copulation of insects of distinct species;
on the male of Crabro cribrarius;
on the pugnacity of the male Tipulae;
on the stridulation of Pirates stridulus;
on the Cicadae;
on the stridulating organs of the cricket;
on Ephippiger vitium;
on the pugnacity of the Mantides;
on difference in the sexes of the Agrionidae;
on the pugnacity of the males of a species of Tenthredinae;
on the pugnacity of the male stag-beetle;
on Bledius taurus and Siagonium;
on lamellicorn beetles;
on the coloration of Lithosia.
Whale, Sperm-, battles of male.
Whales, nakedness of.
Whately, Arch., language not peculiar to man;
on the primitive civilisation of man.
Whewell, Prof., on maternal affection.
Whiskers, in monkeys.
White, F.B., noise produced by Hylophila.
White, Gilbert, on the proportion of the sexes in the partridge;
on the house-cricket;
on the object of the song of birds;
on the finding of new mates by white owls;
on spring coveys of male partridges.
Whiteness, a sexual ornament in some birds;
of mammals inhabiting snowy countries.
White-throat, aerial love-dance of the male.
Whitney, Prof., on the development of language;
language not indispensable for thought.
Widgeon, pairing with a pintail duck.
breeding plumage of the male;
female, rejecting the unadorned male.
Widows and widowers, mortality of.
Wilckens, Dr., on the modification of domestic animals in mountainous
on a numerical relation between the hairs and excretory pores in sheep.
Wilder, Dr. Burt, on the greater frequency of supernumerary digits in men
than in women.
Williams, on the marriage-customs of the Fijians.
Wilson, Dr., on the conical heads of the natives of North-Western Africa;
on the Fijians;
on the persistence of the fashion of compressing the skull.
Wings, differences of, in the two sexes of butterflies and Hymenoptera;
play of, in the courtship of birds.
Winter, change of colour of mammals in.
Wives, traces of the forcible capture of.
Wolf, winter change of the.
Wolff, on the variability of the viscera in man.
Wollaston, T.V., on Eurygnathus;
on musical Curculionidae;
on the stridulation of Acalles.
Wolves, learning to bark from dogs;
hunting in packs.
Wombat, black varieties of the.
Women, distinguished from men by male monkeys;
preponderance of, in numbers;
selection of, for beauty;
effects of selection of, in accordance with different standards of beauty;
practice of capturing;
early betrothals and slavery of;
freedom of selection by, in savage tribes.
Wonder, manifestations of, by animals.
Wonfor, Mr., on sexual peculiarities, in the wings of butterflies.
Wood, J., on muscular variations in man;
on the greater variability of the muscles in men than in women.
Wood, T.W., on the colouring of the orange-tip butterfly;
on the habits of the Saturniidae;
quarrels of chamaeleons;
on the habits of Menura Alberti;
on Tetrao cupido;
on the display of plumage by male pheasants;
on the ocellated spots of the Argus pheasant;
on fighting of Menura superba;
on the habits of the female cassowary.
Woodcock, coloration of the.
Woodpecker, selection of a mate by the female.
Woodpeckers, tapping of;
colours and nidification of the;
characters of young.
Woolner, Mr., observations on the ear in man.
Wormald, Mr., on the coloration of Hypopyra.
Wounds, healing of.
Wren, young of the.
Wright, C.A., on the young of Orocetes and Petrocincla.
Wright, Chauncey, great brain-power requisite for language;
on correlative acquisition;
on the enlargement of the brain in man.
Wright, Mr., on the Scotch deer-hound;
on sexual preference in dogs;
on the rejection of a horse by a mare.
Wright, W. von, on the protective plumage of the Ptarmigan.
Wyman, Prof., on the prolongation of the coccyx in the human embryo;
on the condition of the great toe in the human embryo;
on the occurrence of the supra-condyloid foramen in the humerus of man;
on variation in the skulls of the natives of the Sandwich Islands;
on the hatching of the eggs in the mouths and branchial cavities of male
Xenarchus, on the Cicadae.
Xenophon, selection in mankind advocated by.
Xenorhynchus, sexual difference in the colour of the eyes in.
Xiphophorus Hellerii, peculiar anal fin of the male.
Xylocopa, difference of the sexes in.
Yarrel, W., on the habits of the Cyprinidae;
on Raia clavata;
on the characters of the male salmon during the breeding season;
on the characters of the rays;
on the gemmeous dragonet;
on colours of salmon;
on the spawning of the salmon;
on the incubation of the Lophobranchii;
on rivalry in song-birds;
on the trachea of the swan;
on the moulting of the Anatidae;
on the young of the waders.
Yellow fever, immunity of negroes and mulattoes from.
Youatt, Mr., on the development of the horns in cattle.
Yura-caras, their notions of beauty.
Zebra, rejection of an ass by a female;
stripes of the.
Zebus, humps of.
Zigzags, prevalence of, as ornaments.
Zincke, Mr., on European emigration to America.
Zootoca vivipara, sexual difference in the colour of.
Zouteveen, Dr., polydactylism;
proportion of sexes at Cape of Good Hope;
spiders attracted by music;
on sounds produced by fish.
Zygaenidae, coloration of the.