128 Mammals of Eastern Asia 
portional width of the posterior part of the palate. The young 
have a coat pattern of white and red with some gray. There 
are two races, the type and the Black-footed Douc, P. nigripes. 
The Douc Langur, Pygathrix nemcea, can be recognized by 
the flesh-colored face, white forearms and black hands. The 
chin, throat, and cheeks are white. Across the hind throat is a 
broad band of reddish, adjoining a black collar that reaches the 
front of the shoulders. The body color is gray; the tail and 
inguinal regions are white, set off by black on the thighs and 
hind abdomen; the legs between knee and ankle are reddish. 
The length of the head and body is from 23 to 25 inches, of the 
tail from 20 to 22 inches. 
This Monkey occurs in northern Cochin-China, central 
Annam, central Laos, and in the Island of Hainan. 
The Black-footed Douc, Pygathrix nemcea nigripes, is 
darker than the last. The face and feet are blackish and the 
forearms gray. The leg between knee and ankle is black. The 
length of head and body is from 22 to 28 inches, of the tail 
from 28 to 30 inches. 
The range includes southern Cochin-China, the delta areas 
of the Mekong River, and the extreme south of Annam. 
The specialized Colobid Monkeys that have either shortened 
their tails or altered the shapes of their noses, or both, include 
the Pig-tailed Langur of Sumatra, Simias, the Snub-nosed Mon- 
keys, including the Golden Monkey of China, Rhino pithecus, 
the Tonkin Snub-nosed Monkey, Presbytiscns, and the Pro- 
boscis Monkey, Nasalis, of Borneo. Of these only the continen- 
tal Presbytiscns and Rhino pithecus need be considered. 
The Snub-nosed Monkeys, genus Rhinopithecus, with type 
R. roxellance, contain three widely separated species in China. 
Though related to the Langur s by the lack of cheek pouches and 
large sacculated stomach, these Monkeys are distinguished by 
the peculiarly up-turned and prominent nose and the proportions 
of the thickish limbs : the upper arm is longer than the forearm. 
