Descriptions of East Asiatic Mammals 225 
of the back is blackish and around the eyes reddish, the under- 
pays reddish chestnut, the chin and throat buffy gray, the tail 
blackish. The length of the head and body is about 8% inches, 
of the tail 7% inches, hind foot almost 2 inches. The typical 
form is reported from Moulmein, Burma (Ellerman). Known 
races are C. a. thai of central Siam, C. a. shanicus from north 
Shan States, C. a. zimmeensis from north Siam. In the last 
named the black area of the back is almost obsolete. The species 
also reaches Laos and Cochin-China. 
The Gray-handed Tree Squirrel, Callosciurus griseimanus, 
;was compared originally with the Yellow-handed Tree Squirrel. 
The body color is a grizzle of light gray and black, the under- 
pays bright red, though the red is not continued to the throat. 
iThe hands and feet are clear yellowish gray. The head and muz- 
zle are grizzled like the back. The length of the head and body 
is 8 inches, tail 7 inches, hind foot 2 inches. This Squirrel was 
first described from Saigon, Cochin-China. There are races of 
doubtful validity, C. g. leucopus from Cambodia and C. g. vas- 
sali from Ninh Hoa, Annam. 
The Gray-headed Tree Squirrels, Callosciurus caniceps, 
with type from northern Tenasserim (Ellerman), are chiefly 
members of a single widely distributed species. The normal 
color is gray, with the top of the head, the feet, and the under- 
pays paler gray. The tip of the tail is black. According to 
Bonhote, this species puts on a bright dress for the breeding 
season, just as many birds do. At that time (January) the back 
becomes deep orange and the underparts, limbs, tail, and face 
become reddish, the hairs being red-tipped with black bases. The 
length of the head and body is about 8% inches, of the tail 8 
inches, of the foot 1% inches. 
The caniceps group is closely related to the erythrceus group. 
Many forms have been described from comparatively restricted 
areas. Several mainland races are recognized, though most occur 
on nearby islands. The races of the Malay Peninsula include 
