24 THE BLACK YARKE, 
mentions one of these creatures which was accustomed to catch a pig every 
1uorning, and, mounting upon its back, to retain its seat during the day. 
Even while the pig was feeding in the savannas its rider remained firm, 
and bestrode its victim with as much pertinacity as Sinbad’s old man of 
the sea. 
There is some difficulty in settling the species of the Capucins, for their 
fur is rather variable in tint, in some cases differing so greatly as to look like 
another species. The general tint of the CAPUCIN is a golden olive, a whiter 
fur bordering the face in some individuals, though not in all. 
There are several monkeys known by the name of Sakis, among which 
are reckoned the Cuxio, a rather odd little animal, and two other species, 
which are easily distinguished from each other by the colour of their heads, 
A 
“\) C \ / 
Mie 
J) 
BLACK YARKE.—(Pithecta leucocephala.) 
The first of these animals is the BLACK YARKE, or WHITE-HEADED Sak], 
and the other the CACAJAO, or BLACK-HEADED SAKI. 
The former of these Sakis is a rather elegant creature in form, and of 
colour more varied than those of the Cuxio. As will be seen from the accom- 
panying engraving, the head is surrounded with a thick and closely-set fringe 
of white hair, which is rather short in the male, but long and drooping in the 
female. The top of the head 1s of a deep black, and the remainder of the 
body and tail is covered with very long and rather coarse hair of a blackish- 
brown. Under the chin and throat the hairs are almost entirely absent, and 
the skin is of an orange hue. 
Beside the difference of length in the facial hairs of the female Yarke 
there are several distinctions between the sexes, which are so decided as to 
have caused many naturalists to consider the male and female to belong to 
