The Descent of Man

pearance and bright colours. The Semnopithecus
nemaeus, though peculiarly coloured, is
described as extremely pretty; the orangetinted
face is surrounded by long whiskers of
glossy whiteness, with a line of chestnut-red
over the eyebrows; the fur on the back is of a
delicate grey, with a square patch on the loins,
the tail and the fore-arms being of a pure white;
a gorget of chestnut surmounts the chest; the
thighs are black, with the legs chestnut- red. I
will mention only two other monkeys for their
beauty; and I have selected these as presenting
slight sexual differences in colour, which renders
it in some degree probable that both sexes
owe their elegant appearance to sexual selection.
In the moustache-monkey (Cercopithecus
cephus) the general colour of the fur is mottledgreenish
with the throat white; in the male the
end of the tail is chestnut, but the face is the
most ornamented part, the skin being chiefly
bluish-grey, shading into a blackish tint beneath
the eyes, with the upper lip of a delicate