302 MamMaLtIA OF INDIA. 
DESCRIPTION.—Dr. Anderson says the name applied to the species 
is not appropriate, as many individuals have the upper parts more or 
less yellowish, but it is dark above, blackish, faintly washed with hoary 
or rufous; white beneath with a slight yellow tinge ; the ears and feet 
flesh-coloured. 
Jerdon says the young are pure black and white ; the teeth are bright 
orange red. 
Size.—Head and body, 11 inches; tail, 84 to 9 inches. 
Jerdon procured it near Darjeeling; it frequents elevations from 
3000 to 5000 feet. 
No. 309. PTEROMYS SPADICEUS. 
The Red Flying Squirrel. 
NaTIvE NamMe.—Aywetshoo-byan, Arakanese. 
Hapitat.—Arakan. 
DEscRIPTION.—Upper parts bright ferruginous bay; under parts 
woolly and dull white; the membrane, limbs, and tail dusky; the 
terminal third of the tail pale rufous. 
S1ze.—Head and body, 5 inches; tail, 4} inches. 
ARCTOMYDINA[—THE MARMOTS. 
Stout-bodied, short-tailed animals, with a rudimentary thumb with a 
flat nail. They are gregarious and terrestrial, living in burrows, where 
they store provisions against inclement seasons. Some of the genera 
have cheek pouches, but the true marmots, such as our Indian species, 
have not. They differ somewhat in dentition from the squirrels in 
having the first upper molar somewhat larger, and the other molars 
also differ in having transverse tubercles on the crown. The first 
upper tooth is smaller than the rest ; the ears are short and round, as is 
also the tail; the hind-feet have five toes, the fore-feet a tubercle in 
the place of the thumb. 
GENUS ARCTOMYS. 
Stout body, short tail, large head and eyes, no cheek pouches, mammez 
ten to twelve. 
It —_ 
; molars, are 
Dental formula : Inc., —— ; pre- ‘molars, + ——" 
