ART. 1 MAMMALS FROM CHUSTA HOWELL 47 



than the molars, and but little longer (4.5). The tooth pattern is 

 entirely comparable to that given for an animal of this genus by 

 Heude,^ that being of a young specimen also. As this is the only 

 representative of the genus in the National collection it was sent to 

 Mr. Thomas, who pronounced it typical of this species. 



Genus PETAURISTA Link 



PETAURISTA CLARKEI Thomas 



Petaurista clarlcei Thomas, Ann. Mag. Nat. Hist., ser. 9, vol. 10, 1922, p. 396 

 (Mekong "Valley, Yunnan, China). 



Specimens. — Three from Tsehchung, Yunnan. 



This squirrel has the hairs slaty at base, tipped upon the body with 

 cream, and upon the parachute with rufous. Below the pelage is 

 buffy, darkening to ochraceous on the parachutes. The head is pale 

 gray, the tail tip black, and the feet rufous. 



PETAURISTA RUBICUNDUS A. B. Howell 



Petaurista ruhicundus A. B. Howell, Journ. Wash. Acad. Sci., vol. 17, 1927, 

 p. 82 (Mapientung, Szechwan, China). 



Specmien. — One — ^the type. 



This squirrel has the underparts light but bright rufous, face, chin, 

 sides of neck and feet darker rufous, and hairs of the remainder of 

 the body appearing to be broadly tipped with the same color, although 

 closer inspection shows that the end of the guard hairs are black. 

 The tip of the tail is also black. 



PETAURISTA SULCATUS A. B. Howell 



Petaurista sulcatus A. B. Howell, Journ. Wash. Acad. Sci., vol. 17, 1927, p. 82 

 (Hsinlungshan, 65 miles northeast of Peking, Chihli, China). 



.Specimens. — Three from Chihli : Hsinlungshan, 2 (including the 

 type) ; Eastern Tombs, 1. 



This is a squirrel of the xanthotis type of dull coloration but con- 

 siderably smaller. The maxillary incisors are very broad and each 

 with a Avell-defined groove. 



PETAURISTA XANTHOTIS (Milne-Edwards) 



Pteromys xanthotis Mix,ne-Ed wards, Ann. Sci. Nat., Zool., vol. 8, 1867, p. 301 

 (Tibet). 



Specimen. — One from Taochow, Kansu, 



This fine flying squirrel is apparently distinct from Tnelanopferus, 

 as discussed in the original description of P. sulcatus. It may be 

 mentioned that by " Tibet," Milne-Edwards usually signified a part 

 of the country that is now within the borders of China. 



' Mem. Hist. Nat. Emp. Chlnois, vol. 4, pi. 10. 



