Vol. XX, pp. 87-88 December 1 1 , 1907 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTIONS OF TWO NEW SUBSPECIES OF NORTH 

 AMERICAN MAMMALS. 



BY E. W. NELSON. 



I am indebted to the courtesy of ISIr. Oiitram Bangs, Curator 

 of Mammals, Museum of Comparative Zoology, for the oppor- 

 tunity to describe the snowshoe rabbit named below. The 

 squirVel is a further illustration of the extraordinary variation 

 in Mexico in the genus Sciurus. 



Lepus bairdi cascadensis subsp. nov. 



CASCADE MOUNTAIN SNOWSHOE RABBIT. 



Type from Roab's Ranch, near Hope, British Columbia, Canada, No. 

 1886, adult c? , Museum of Comparative Zoology ; collected by W. C. Colt, 

 June 12, 1894. 



Geographic distribution. — Cascade Mountains of southern British Co- 

 lumbia from the vicinity of Hope on Eraser River, south along the east 

 side of the mountains at least to central Washington. 



Suhspecijic cliaracters. — Color of uiiperpartsmost like bairdi, but darker 

 and more of a dusky reddish-cinnamon brown with the largest and most 

 strongly marked blackish rump patch of any of the snowshoe rabbits ; 

 head dark reddish cinnamon, contrasting with the darker or more dusky 

 body; ears long as in bairdi; skull much hke that of L. a. columbiensis. 



Remarks. — This form becomes wliite in winter. 



Sciurus socialis littoralis subsp. nov. 



PORT AN(4EL SQUIRREL. 



Type from Puerto Angel, Oaxaca, Mexico, No. 71,.S22, adult $ , U. S. 

 National Museum (Biological Survey Collection); collected by E. W. 

 Nelson and E. A. Goldman, March 11, 1895. 



Geographic distribution. — Coastal hills of southern Oaxaca near Puerto 

 Angel. 



General characters. — Generally similar to S. socialis but upperparts of 

 body including tail distinctly more whitish while the nape patch averages 

 darker rufous; tail with a broad band of dark, rich rufous along entire 

 length next the skin and showing consiMcuously along middle of underside ; 



20— Proc. Biol. Soc. wash., Vol. XX, 1907. (87) 



