1897.] NATURAL SCIENCES OF PHILADELPHIA. 321 



2. Sciuropterus alpinus fuliginosus Subsp. nov. Cascade Mountain Flying Squir- 

 rel. 



Type No. 1,058, ad. $ , Col. of S. N. Rhoads. Collected by Al- 

 lan Rupert on the Cascade Mountains near Martin Station, Kittitass 

 Co., Washington, at an elevation of about 8,000 feet, March, 1893. 



Geographic distribution. — Higher elevations of the Cascade, Coast 

 and Sierra Nevada Mountains, probably intergrading southward 

 into subspecies californicus, and in the coast lowlands to oregonen- 

 sis. 



Habitat. — Spruce forests of the higher mountains. 



General characters. — Size and proportions as in alpinus; colors 

 darker, more sooty, browner above, beneath brownish-yellow. 



Color. — Winter and summer pelages very similar, not glossy. 

 Color of type : hair of back, rump, upper sides, top of head and base 

 of tail, minutely tipped with broccoli brown, 16 the brown tips poorly 

 concealing, even in the smoothest and fullest pelaged specimens, 

 the blackish-slate of under fur, giving the upper parts a dull mot- 

 tled slaty-drab appearance. Upper basal half of tail like back, re- 

 mainder becoming more slaty, the terminal third blackish-slate with 

 a smoke-gray cast. Upper surface of flying membrane like upper 

 terminal third of tail. Upper surfaces of feet mouse-gray; the fur 

 covering hind toes gray. Lower surface of tail smoke-gray, becom- 

 ing more broadly bordered with blackish-slate toward distal end. 

 Entire underparts light drab-gray, with a wood-brown tinge at base 

 of throat and along lower margin of flying membrane; a nearly 

 white narrow stripe extends along extreme outer lower margin of 

 flying membrane in contrast with the dark colors of upper margin ; 

 basal | of hairs of underparts plumbeous. Hairy soles of feet and 



parietal plane and great relative mastoid width as contrasted with skulls of 

 sabrinus. In color the oldest example, No. 6,959, Col. of E. A. and O. Bangs 

 is darker, less rusty, wood-brown than Maine sabrinus above and the tail is 

 more heavily shaded with black above and below. The sides of face, lips, 

 eyelids and ears are strongly shaded with black on a smoke-gray ground and 

 the underside of body tinged with wood brown, darkest on sides of abdomen. 

 Upper feet, grayish plumbeous. Total length 304 mm. tail vertebrce 146 ; 

 hind foot 40 ; ear from crown, 16. The other specimen No. 6,960 is darker 

 (blacker) above, the brown having an olive cast. This form is lighter colored 

 and smaller than fuliginosus, darker and smaller than alpinus and paler and 

 larger than sabrinus. Its cranial characters, as above outlined, are quite dis- 

 tinct from those of sabrinus and agree with alpinus in their differences 

 from fuliginosus. I propose to name it for Mr. Outram Bangs, Sciuropterus 

 alpinus bangsi, subsp. nov. Type, No. 6,959, Col. of E. A. & O. Bangs, from 

 Idaho County, Idaho. Col. by Harbison and Bargamin, Raymond, Idaho. 

 16 Color-standards of Ridgway's Nomenclature are used in this paper. 



