VOL. XII, PP. 83-84 MARCH 24, 1898 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTION OF A NEW WHITE-FOOTED MOUSE 

 FROM THE MOUNT BAKER RANGE, BRITISH CO 

 LUMBIA. 



BY OUTRAM BANGS. 



Several mice from the northwest belonging to the very distinct 

 austerus-canadensis group of the genus Peromyscus have already 

 been brought to notice. The subject of the present description 

 is another that seems entitled to recognition. The group to 

 which it belongs is a boreal one, and is distinguished from the 

 leucopus group externally by a long hairy, sharply bicolored tail 

 (as long or longer than the head and body), with decided pencil, 

 and cranially by a broad flattened braincase and elongate slen 

 der rostrum. It probably has a transcontinental range and its 

 members are all forest-dwellers. 



The recognized forms are as follows : 



Peromyscus austerus (Baird). 



Coast lowlands and valleys of Washington and British Columbia ; 

 Transition Zone. 



P. keeni (Rhoads). 



Queen Charlotte Islands, B. C. 



P. macrorhinus (Rhoads). 

 Skeena River, B. C. 



P. sitkensis Merriam. 

 Sitka, Alaska. 



P. oreas Bangs. ^ 



Cascade Mountains of Washington and southern British Colum 

 bia ; Boreal Zone. 



P. canadensis canademis (Miller). 



Cool, dark forests of Canadian and Transition Zones in eastern 

 North America. 



18-BioL. Soc. WASH., VOL. XII, 1898 (83) 



