SCIENTIFIC RESULTS OF THE MAMMAL SURVEY. 25 



Dremomys eufigenis. 

 The red-cheeked Squirrel. 



This species was originally described from Mount Moolejdt, 

 Tenasserim, and other specimens have since been referred to it from 

 Siam and Yunnan. * In addition, two subspecies have been describ- 

 ed by Bonhote, D. r. helfieldi, from the Malay Peninsula, and D. r. 

 fuscus from Annam. 



In the Burma collection thei"e are four specimens of it from the 

 Mandalay region, representing a new subspecies, while I also find 

 it necessary to distinguish the Yunnan race as a fifth local race. 



It is however to be noted that these animals show a remarkable 

 variation in the shape and size of the skull, some having compara- 

 tively small skulls, with conical muzzle, while others have a larger 

 skull with larger brain case and a longer muzzle which is more 

 pinched in laterally. Possibly there may prove to be more than 

 one species among them, but for the moment I leave them provi- 

 sionalty all under the specific name of rufigenis. Further series, 

 showing change of skull with age, and exact geographical distribution 

 and intergradation ( or otherwise ) of the different forms will be 

 needed before any final conclusion can be arrived at. 



Deemomys e. adamsoki, subsp. n. 



Adamson's red-cheehed Squirrel. 



General characters as in true rufigenis. Body with the same 

 drabby or muddj'' suffusion in the olive of the upper surface, the 

 rump and hips similarly more brown. Top of muzzle less rufous, 

 with hardljr a trace of ferruginous in its grizzling. Patch behind 

 ear small, dull buffy. Rufous of cheeks less extended, almost 

 replaced by brown between eye and ear. Under surface conspicu- 

 ously whiter ; the interramia and throat almost pure white, the belly 

 hairs with their white tips almost hiding their slaty basis, and 

 the hairs in the inguinal region and on the inner side of the thighs 

 prominently white. In rufigenis the hairs of the throat and inguinal 

 regions are more or less washed into ochraceous. 



Skull of the size and shape of that of nfi.genis. Posterior edge of 

 nasals V-shaped, the angle forwards. 



Dimensions of the tyfe. — Head and body 200 mm ; tail 125 ; hind- 

 foot 43 ; ear 21. 



Slhull. — Greatest length 52 ; zygomatic breadth 27*5 ; nasals 

 16 X 6-5; interorbital breadth 14-4 ; breadth of brain case 22-2 ; 

 palatilar leng-th 22 ; p* and three molars 8-8. 



Hah. — Upper Burma. Type from Maymyo, alt. 2,800'. Other 

 specimens from Kalaw, S. Shan States, 4,800'. 



Ty^e. — Adult male, B. M. No. 14.4.3.3. Original number 3433. 

 Given to Mr. Shortridge by its collector Mr. J. P. Cook. Presented 

 to the National Museum by the Bombay Natural History Society. 

 4 



