290 
SEXUAL SELECTION: MAMMALS. 
Pakt 
it 
winter or breeding coat ; so that this case may 
compared with those given in a previous chapter 0 
closely-allied or representative species of bii’ds which 
differ from each other only in their nuptial plumag e - 
The females of Cervus paludosus of S. America, 
well as the young of both sexes, do not possess tb e 
black stripes on the nose, and the blackish-brown l 111 ® 
on the breast which characterise the adult males" 
Lastly, the mature male of the beautifully coloured 
spotted Axis deer is considerably darker, as I am 
formed by Air. Myth, than the female ; and this b 11 ® 
the castrated male never acquires. 
The last Order which we have to consider — for I iin ‘ 
not aware that sexual differences in colour occur 111 
the other mammalian groups — is that of the Primal' 
The male of the Lemur macaco is coal-black, wbnf 
the female is reddish-yellow, but highly variable 
colour .' 29 Of the Quadrumana of the New World, ^ 
,visb' 
in- 
females and vouiu 
of Mycetes caraya are grey 1 
yellow and alike; in the second year the young 11111 
becomes reddish-brown, in the third year black, 
cepting the stomach, which, however, becomes T 1 ' 1 ' 
black in the fourth or fifth year. There is als° 
strongly-marked difference in colour between the 
in Mycetes senicuhis and Cebus capucinus ; the y° ll)lr 
of the former and I believe of the latter species re 
sembling the females. With Pithecia leucocephcd a ^ * 
young likewise resemble the females, which are brown 13 1 
27 1 Ottawa Academy of Sciences,’ May 21, 1808, p. 3, 5. 
22 S. Muller, on the Bnnteng, « Zoog. Indischen Archipel.’ 1839:1- , , 
tab. 35 : see also Baffles, as quoted by Mr. Blytb, in ‘Land and W 1 * 1 ^ 
1867, p. 476. On goats, Dr. Gray, ‘Cat. Brit. Mus.’ p. 146; Desniim ; 
‘ Mammalogie, p. 482. On the Cervus paludosus, Rcngger, ibid. s. „ 
29 Sclater, ‘ Proc. Zool. Soc.’ 1866, p. 1. The same fact has also > 
fidly ascertained by MM. Pollen and van Dain. 
