OCT., 1900.] MAMMALS OF THE YUKON EEGION. 25 



of MacMilliui liivor, and they were also reported from the head 

 waters of the Stewart and from the Xanana Hills. 



Oreamnos montanus (Ord). Mountain Goat. 



Goats occur on the high granite clifl's which inclose the upper part 

 of Lynn Canal; they arc also common on the mountains near White 

 Pass and about the rock}' walls of Lake Bennett. 1 was told that they 

 had been killed recentl}'^ at the upper end of Little Windy Arm on 

 Lake Tagish, but I could obtain no relia])le report of their occurrence 

 in the interior bej^ond this point. At Lake Lebarge they were very 

 doul)tfully reported. Their range is known to extend north to White 

 Pass in the coast mountains at least to Copper River/ ])ut does not 

 reach far into the interior. Hunters from the mountains a1)out the 

 upper waters of the Pelly and Stewart rivers asserted positively that 

 none had been heard of in that region. 



The station agent at Glacicn-, near White Pass summit, told me that 

 goats frequently appear on the cliffs within easy view of his house. 

 He also showed me the hide of one that had been killed near there 

 a short time before our arrival. I made one short trip into these 

 mountains, but failed to see any goats. The character of the cliffs 

 is ideal for them, but they had evidently gone farther hack to their 

 summer feeding' grounds, as the abundant tracks and dung were 

 a few weeks old. 



Sciuropterus yukonensis sp. nov. Yukon Flying Squirrel. 



Ti/2'i' from Camp DavidiJon, Yukon River, near Alasska-Canada boundary. No. Hf if) 

 U. S. Nat. Mu.«. Collected Decemljer 8, 1890, by R. E. Carson. 



Characters. — Size largest of North American flying squirrels; tail 

 exceedingly long; color rather dark, underparts suffused with fulvous; 

 skull slightly characterized. 



Color. — Top of head, neck, and upperparts to base of tail pale cin- 

 namon or between the wood brown and cinnamon of Ridgway; under- 

 fui' ]>luish black, partially exposed on legs and membranes; underparts 

 dull whitish, irregularl}^ suffused with cinnamon fawn; feet dusky 

 above, lightly edged with creamy white, buffy white below; cheeks 

 and sides of head ashy, lighth^ mixed with cinnamon; end of nose 

 slightly paler than top of head, not light ashy as in S. sahrinus; black 

 e^'c-ring prominent; tail light fawn below, with a light edging of 

 dusky, becoming l)roader toward tip; tail above fawn heavily mixed 

 with black, which predominates for terminal fifth. 



Sh///. — Size large, slightly larger than in S. alpfm(.s/ audital 

 bulla? larger; width at postorbital constriction greater; molars heavier, 

 particularly the mandibular series. 



1 H. T. Allen, Science, YII, 57, 1886. 



