A. sing-sing, Gray, Cat. B. Mus. p. 100. Desmarest, Mammalogie, p.
468, on the A. caama. Andrew Smith, Zoology of S. Africa, on the
Gnu.) Other analogous cases could be added.
The Banteng bull (Bos sondaicus) of the Malayan Archipelago is almost
black, with white legs and buttocks; the cow is of a bright dun, as are
the young males until about the age of three years, when they rapidly
change colour. The emasculated bull reverts to the colour of the
female. The female Kemas goat is paler, and both it and the female
Capra aegagrus are said to be more uniformly tinted than their males.
Deer rarely present any sexual differences in colour. Judge Caton,
however, informs me that in the males of the wapiti deer (Cervus
canadensis) the neck, belly, and legs are much darker than in the
female; but during the winter the darker tints gradually fade away and
disappear. I may here mention that Judge Caton has in his park three
races of the Virginian deer, which differ slightly in colour, but the
differences are almost exclusively confined to the blue winter or
breeding-coat; so that this case may be compared with those given in a
previous chapter of closely-allied or representative species of birds,
which differ from each other only in their breeding plumage. (27.
Ottawa Academy of Sciences, May 21, 1868, pp. 3, 5.) The females of
Cervus paludosus of S. America, as well as the young of both sexes, do
not possess the black stripes on the nose and the blackish-brown line
on the breast, which are characteristic of the adult males. (28. S.
Muller, on the Banteng, Zoog. Indischen Archipel. 1839-1844, tab. 35;
see also Raffles, as quoted by Mr. Blyth, in Land and Water, 1867, p.
476. On goats, Dr. Gray, Catalogue of the British Museum, p. 146;
Desmarest, Mammalogie, p. 482. On the Cervus paludosus, Rengger,
ibid. s. 345.) Lastly, as I am informed by Mr. Blyth, the mature male
of the beautifully coloured and spotted axis deer is considerably
darker than the female: and this hue the castrated male never acquires.
The last Order which we need consider is that of the Primates. The male
of the Lemur macaco is generally coal-black, whilst the female is
brown. (29. Sclater, Proc. Zool. Soc. 1866, p. i. The same fact has
also been fully ascertained by MM. Pollen and van Dam. See, also, Dr.
Gray in Annals and Magazine of Natural History, May 1871, p. 340.) Of
the Quadrumana of the New World, the females and young of Mycetes
caraya are greyish-yellow and like each other; in the second year the
young male becomes reddish-brown; in the third, black, excepting the
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