Descriptions of East Asiatic Mammals 247 
14 inches, foot 2% inches. The upper incisors are very broad 
and each has a well-defined groove. This Squirrel is found in 
Hopei, China. 
SMALLER FLYING SQUIRRELS 
The Tufted Flying Squirrels, genus Belomys, are distin- 
guished by the tuft of fine hairs growing at the base of each ear 
and the rather large size of the ears themselves. The cheek teeth 
are extremely complex. The type is B. pears oni from Darjiling 
near Sikkim. The back and the top of the head of B. pearsoni 
are reddish brown finely mixed with black, the flying mem- 
branes blackish brown washed with reddish. The undersurface 
is light reddish (white in the race trichotis). The length of the 
head and body is about 8 inches, of the tail 6 inches, hind foot 
lYs inches. 
There are several local races: B. p. villosus from Assam, 
B. p. trichotis from Manipur, B. p. blandus from Tonkin, and 
B. p. kaleensis from Formosa. The Formosan Belomys p. 
kaleensis has the upperparts reddish buff, mottled with brown ; 
the underparts pale buff. The fur is silky. 
The Smoky Flying Squirrels, Pteromyscus puherulentus, 
known hitherto from Penang and Borneo, will probably be dis- 
covered on the Malay mainland. The small ears have no tufts at 
the base. The color of the Penang race is blackish brown touched 
with pale reflections from the whitish subterminal hair bands. 
The underparts are buffy white, the chest yellowish, the pre-anal 
region orange. The fingers and toes are pale brown and the tail 
brownish gray. The length of the head and body is 10 inches, 
tail Sy 2 inches, foot 1% inches. 
The Eurasian Flying Squirrels, Pteromys volans and allies, 
are colored above light silvery gray or buffy gray, the bases of 
the hairs slaty. A narrow eye ring is blackish. The underparts 
and inner surfaces of the limbs and membranes are dull buffy 
