214 ALLEN’S NATURALIST’S LIBRARY. 
Characters.—Head large in proportion to the body. Hair of 
crown short, reflexed, without crest or “horns.” Tail with 
rather long hair. Face, forehead, throat, shoulders, and crest 
white. General colour of body light or reddish-brown ; back 
and outer side of the limbs, brownish-red. 
Distribution Generally distributed through the forests of the 
level country of the Upper Amazon. 
Habits.—The Caiarara, as the Tupi Indians name this species, 
lives in troops in the forests and feeds on fruits. Mr. Bates, 
who kept one in captivity for a considerable period during his 
stay in the Upper Amazon region, describes it as “a most 
restless creature, but not playful like most of the American 
Monkeys ; the restlessness of its disposition seeming to arise 
from great nervous irritability and discontent. The anxious, 
painful, and changeable expression of its countenance, and the 
want of purpose in its movements, betray this. Its actions are 
like those of a wayward child ; it dces not seem happy even 
when it has plenty of its favourite food, bananas; but will 
leave its own meal to snatch the morsels out of the hands of 
its companions. It differs in these mental traits from its 
nearest kindred, for another common Ceédws, found in the same 
parts of the forest, the Prego Monkey (C. crrzfer), is a much 
quieter and better tempered animal. . . . The Caiarara 
[called Ouavapavi, by Humboldt] is always making some 
noise or other, often screwing up its mouth and uttering a suc- 
-ession of loud notes resembling a whistle.” Itis the most 
wonderful leaper of the whole tribe. Mr. Bates has also re- 
corded :—“ The troops consist of thirty or more individuals 
which travel in single file. When the foremost of the flock reaches 
the outermost branch of an unusually lofty tree he springs forth 
