ClI AP. XVIII. 
ORNAMENTAL COLOURS. 
291 
■’tack above and light rusty-red beneath, the adult 
tlla les being black. The ruff of hair round the face 
Ateles marginatus is tinted yellow in the male and 
"kite in the female. Turning to the Old World, the 
^ales of Hylobates hoolodk are always black, with the 
exception of a white band over the brows ; the females 
'ary fx- om whity-brown to a dark tint mixed with 
Hack, but are never wholly black, 30 In the beautiful 
. erc opithecus diana the head of the adult male is of an 
‘''tense black, whilst that of the female is dark grey ; in 
le former the fur between the thighs is of an elegant 
."Wn-eoloirr, in the latter it is paler. In the equally 
dutiful and curious moustache monkey (Cercojoithecus 
Ce phus) the only difference bet ween the sexes is that 
le tail of the male is chesnut and that of the female 
pey ; but Mr. Bartlett informs me that all the hues 
J °come more strongly pronounced in the male when 
*"mlt, whilst in the female they remain as they were 
j Ul ’ing youth. According to the coloured figures given 
y Solomon Muller, the male of Semnopiihecus chry- 
° 0, ne?a S i s nearly black, the female being pale brown. 
11 the Cercopithec'us cynosurus and griseo-viridis one 
j! ai 't of the body which is confined to the male sex is of 
' e most brilliant blue or green, and contrasts strikingly 
"fill the naked skin on the hinder part of the body, 
"nich is vivid red. 
Lastly, in the Baboon family, the adult male of Cyno- 
? e - phalus hamadryas differs from the female not only by 
ls immense mane, but slightly in the colour of the hair 
Utl k of the naked callosities. In the drill ( OynoeepJialus 
leb° 9 n Myoetes ’ Rengger, ibid. 8. 14; and Brehm, ‘ Illustrates Thier- 
0 e ’t i. a. 96, 107. On Ateles, Desmarest, ‘ Mammalogie,’ ]). 75. 
■jj., hylobates, Blyth, 1 Land and Water,’ 1807, p. 135. On the Semno- 
e °ns, g. Midler, ‘Zoog. ludischen Arcbipel.’ tab. x. 
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