Vol. XXIV, pp. 185-186 June 23, 1911 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTION OF A NEW PHILIPPINE FLYING- 

 SQUIRREL. 



BY N. HOLLISTER. 



Among some mammals submitted for identification to the 

 United States National Museum by the authorities of the Phil- 

 ippine Bureau of Science, is a flying-squirrel from Basilan 

 Island, which proves to be new. 



Sciuropterus crinitus sp. nov. 



Type from Basilan Island, Philippines. No. 101, Collection of Philip- 

 pine Bureau of Science, c? adult; skin and skull. Collected by Richard 

 ('. McGregor and A. Celestino, January 12, 1907. 



General characters. — A large member of the subgenus Petinomys; ex- 

 ternally somewhat like Sciuropterus (Hylopetes) nigripes -of Palawan, but 

 size smaller ; ears very small, with three long tufts of hair, one from below, 

 and one from each side; feet grayish-brown instead of black, and tail 

 brown. Fur of back and upper side of parachute long and heavy; belly 

 thinly haired. 



Color of type. — General color of upperparts pale chestnut, finely mixed 

 with black. Nose and lips gray; crown, back, and upper surface of 

 parachute and tail pale chestnut, finely lined with black; tail blackish 

 near tip ; underfur slate color, the hairs tipped with the chestnut and 

 black. Ear tufts brown at base, black at terminal half ; whiskers long 

 and black. Limbs and margin of parachute blackish and buffy; feet 

 grayish-brown. Underparts of body and limbs buffy, the underfur gray; 

 under side of tail pale chestnut, lighter along median line. 



Skull and teeth. — Skull resembling; those of the other larger members of 

 the subgenus Petinomys ; * but bullae slightly less flattened and cheek 

 teeth with the small accessory cusps at outer exit of the valley between 

 the two main transverse ridges very minute. Compared with a skull of 

 Sciuropterus (Petinomys) hageni from Sumatra, which is of the same 

 essential size, it has a narrower zygomatic breadth, with a slightly wider 



* See Thomas, Annals and Mag. Nat. Hist., 1908, I, p. 6. 



33— Proc. Biol. Soc. Wash., Vol. XXIV, 1911. (185) 



