220 Mammals of Eastern Asia 
beneath the white stripe. The tail is black. The length of the head 
and body is about 10 inches, of the tail nearly 11 inches, of the 
hind foot about 2% inches. 
Typical C. prcvosti came from Malacca. The form C. p. 
humei is from Selangor, C. p. wrayi from Pahang. In humei the 
red of the underparts spreads up over the shoulders and a white 
spot appears behind the ear. 
The Red-bellied Tree Squirrels, Callosciurus erythrceus, 
are representative of a large group occupying most of southern 
China from a little north of the Yangtse, south and west to 
Siam, Assam, and into India. The type locality of C. erythrceus 
is unknown, but it must lie within the regions named. 
The color pattern in erythrceus typically includes reddish 
underparts and a trace of a line along the middle of the under- 
side of the body. On the back the color is uniform olivaceous, a 
mixture of greenish gray and reddish. The ears, cheeks, chin, and 
muzzle are grayer, and the backs of the hands and feet blackish. 
The tail is like the body, except the tip, which becomes whitish. 
This description applies chiefly to the race C. e. castaneoventris 
of Hainan. The length of the head and body is from 8 to 9 
inches, of the tail 7 to 8 inches, hind foot about 2 inches. 
A considerable number of other races or species related to 
C. erythrceus are known. In China, all forms have the tip of the 
tail reddish instead of whitish. The northeastern Chinese race, 
C. e. styani, from Anhwei at the mouth of the Yangtse, has the 
ears colored like the back, the underparts grayish white washed 
with buff instead of red. The form found between Chekiang and 
Kwangtung, C. e. ningpoensis, is as the last but the belly is red. 
Farther west two races have reddish ears, C. e. michianus from 
northern Yunnan with the dorsal surface evenly colored, and 
C. e. gordoni from southwest Yunnan and northern Burma with 
the mid-dorsal area paler than the sides. No less than four names 
have been given the Red-bellied Squirrels found in Formosa. 
To the south of China the species erythrceus is continued 
