216 ALLEN’S NATURALIST’S LIBRARY. 
ward on to the nape of the neck; sides of face, throat, chest, and 
front part of shoulders, greyish-yellow. 
Distribution. —Widely distributed in the great forests from 
Paraguay to the United States of Colombia. 
Habits.—This Capuchin wanders about among the high forest 
trees in small companies of from ten to a dozen, the larger 
number being females. It is very timid, and keeps well out of 
sight, so that it is difficult to watch its habits. Rengger, in 
his ‘Saiigethiere von Paraguay,” had more than once an ex- 
cellent opportunity of observing these interesting Monkeys, and 
has givena capital account of them. He specially mentions the 
great affection the mother has for her offspring. ‘The mother’s 
love,” he says, “‘ shows itself by the great care with which every 
old one handles her young, by laying them on the breast, by 
watching them, by searching their fur, and by the attacks they 
make on any intruder.” In January the female gives birth to 
a single young one, and keeps it at her breast for the first week ; 
later on she carries it partly on her back, partly under her arm. 
When sleeping the Weeping Cai curls itself up, covering its 
face with its arms and tail. 
The leader of a troop shares his feelings with the others by 
various motions, and by giving utterance to certain noises, 
which are taken up by the others. Their feelings are also ex-. 
hibited by a kind of laughing and crying. Rengger kept some 
of these Monkeys for several years in captivity in their own 
country, and says that, when happy, they uttered a peculiar 
tittering sound ; they express agreeable sensations by drawing 
back the corners of the mouth without uttering any sound; 
this he supposed to be laughing, but, as Mr. Darwin re- 
marks, it would be more appropriately called a smile. When 
