UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 12, No. 16, pp. 497-501 May 6, 1916 



TWO NEW APLODONTIAS FROM WESTERN 

 NORTH AMERICA 



BY 

 WALTER P. TAYLOR 



MAYS4i&lf 



(Contribution from the Museum o( Vertebrate Zoology of the University of California) 



The genus Aplodontia is found west of the Sierra Nevada-Cascade 

 mountain system from southern British Columbia on the north to 

 middle California on the south. Study of specimens of the genus from 

 the northern part of the range demonstrates the existence there of two 

 subspecies hitherto unrecognized. The writer desires to express his 

 thanks for the loan of material to the authorities of the Field Museum 

 of Natural History, especially to Mr. Wilfred H. Osgood, to those of 

 the Museum of Comparative Zoology, particularly to Messrs. Samuel 

 Henshaw and Outram Bangs, and to those of the Bureau of Biological 

 Survey of the United States Department of Agriculture, especially 

 to Messrs. H. W. Henshaw and E. W. Nelson. He is also indebted 

 to the authorities in charge of the Museum of Comparative Zoology, 

 particularly to the director, Mr. Samuel Henshaw, for the privilege 

 of describing a new subspecies of Aplodontia on the basis of material 

 loaned. 



Aplodontia rufa grisea, new subspecies 

 Puget Sound Mountain Beaver 



Type. — Female adult, no. 3751, Mus. Vert. Zool. ; Renton [near 

 Seattle], Washington; October 4, 1907; collected by Frank Stephens; 

 orig. no. 294 ; stuffed skin, with skull and jaws, all in good condition, 

 except hamulars broken. 



Diagnosis. — Similar to examples of Aplodontia rufa rufa, but 

 paler, grayer; separable from Aplodontia rufa olympica through ab- 



