SUMMARY OF THE INDIAN MAMMAL SURVEY. 



363 



Subfamily I. — SciURiN^. 



The following is a key to the genera, viz : — 



Key to the genera of SciURiNiG. 



A. Limbs connected by a membrane or 

 parachute. 



a. Hypsodont ; inner borders of upper 



molars proximately subangnlate, 

 their upper siirfaces flat ... 



b. Brachyodont ; inner borders of upper 



molars rounded, their upper surface 

 irregular. 

 a\ An interfemoral membrane attach- 

 ed to the tail ; this latter is 

 bnshy, not distichous ... 

 b\ No interfemoral membrane ; tail 

 distichous. 



a 



Strong tufts of hair at bases of 



B. 



a. 

 h. 



ear-conch in front ; teeth exces- 

 sively wrinkled, posterior internal 

 cusps well developed ... 

 y^. ]^]ar-tufts absent or but little 

 developed; teeth not excessively 

 wrinkled ; posterior internal 

 cusps not developed ... 

 Limbs free, not connected by mem- 

 brane. 



Size \QVY large 

 Size smaller. 

 a\ jMuzzle long and pointed ; a pale 



spot behind each ear ... 

 //. Muzzle comparatively blnnt ; no 

 pale spots behind the ears. 

 a'. No stripes on back. 

 a. No seasonal hip-patch 

 h\ A seasonal hip-patch 

 h^. Back striped. 



a\ A median dorsal pale line... 

 h\ No pale line on back. 



a'. Size larger; no central 

 dorsal stripe ; head and 

 body 175 mm. ... 

 6'. Size smaller; a central 

 dorsal black stripe ; head 

 and body 125 mm. 



I. EUPETAURUS. 



II. Petaurista. 



III. Belomys. 



IV. Pteromys, 



V. Ratufa. 



VI. Dremomys. 



VII. Callosciurus. 



VIII. TOMEUTES. 

 IX. FUNAMBULUS. 



X. Menetes. 



XI. Tamiops. 



