Vol. XI, p. 225 



July 15, 1897 



PROCEEDINGS 



BIOLOGICAL SOCIETY OF WASHINGT 



DESCRIPTION OF A NEW FLYING SQUIRREL FROM 

 FT. KLAMATH, OREGON. 



BY C. HART MERRIAM. 



Sciuropterus alpinus klamathensis subsp. nov. 



Tifpe from Fort [vlamath, Oregon (Transition zone, altitude 4200 feet). 

 No. 87310, 9 ad. U. S. Nat. Mus., Biological Survey Coll. Collected 

 Jan. 11, 1897, by B. L. Cunningham. Original No. 355. 



General characters. — Similar to*'^'. alpinus fnligiuo-ms Rhoads, but smaller ; 

 tail paler above and bufiy below (not clouded with dusky). Differs from 

 faliginosus in having the nose and head much paler, cheeks yellowish 

 white instead of bluish gray, and audital bullae smaller. 



Color. — Upper parts dark dral) brown, sometimes tinged with pale dull 

 fulvous brown ; under parts yellowish buff, the plumbeous under fur 

 showing through ; tail: upper surface like back, but somewhat darker, 

 especially toward the end ; under surface uniform deep buff; nose and 

 face pale ; cheeks pale yellowish gray ; top of head very pale grayish ful- 

 vous ; ears decidedly paler than in true alpinus or faliginosus. 



Cranial c/utrader.s.— Contrasted with S. alpinus the skull is narrower 

 posteriorly, particularly the braincase and posterior roots of the zygomata. 

 Compared with fuliginosus the audital bulla? are decidedly larger and the 

 braincase is less strongly decurved posteriorly. 



Measurements. — Type specimen : total length, 329 ; tail vertebrte, 138 ; 

 hind foot, 38. 



52-Hior,. Soc. W.\SH., Vol,. XI, 1897 



(22.5) 



