VOL. XI, P. 225 JULY 15, 1897 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTION OF A NEW FLYING SQUIRREL FROM 

 FT. KLAMATH, OREGON. 



BY C. HART MERRIAM. 



Sciuropterus alpinus klamathensis subsp. nov. 



Type from Fort Klamath, Oregon (Transition zone, altitude 4200 feet). 

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

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



General characters. Similar to /?. alpinus fuliginosus Rhoads, but smaller ; 

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

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

 white instead of bluish gray, and audital bullse smaller. 



Color. Upper parts dark drab 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 fuliginosus. 



Cranial characters. Contrasted with S. alpinus the skull is narrower 

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

 Compared with fuiiginosus the audital bullse are decidedly larger and the 

 braincase is less strongly decurved posteriorly. 



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

 hind foot, 38. 



52-BioL. Soc. WASH., VOL. XI, 1897 (225) 



