VOL. XIV. PP. 135-136 AUGUST 9, 1901 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



A NEW POCKETMOUSE FROM SOUTHERN 

 CALIFORNIA. 



BY EDGAR A. MEARNS. 



The form of Peroynatkus fallax inhabiting the eastern or 

 desert slopes of the mountains of Riverside and San Diego 

 counties, California, and thence southward along the eastern 

 slope of the Coast Range into Lower California, is almost as 

 pallid as the pocketmouse of the Colorado Desert which Mr. 

 Osgood named Perognaihu* peniciUatus angu&tirostris. The 

 name f<illd,i', in a subspecific sense is here restricted to the ani 

 mal of the coastal region, although the type and series of topo- 

 types, from Reche Canyon, three miles southeast of Colton, San 

 Bernardino 1 County, California, are almost exactly intermediate 

 between it and the desert race. The darkest individuals ex 

 amined are from Rose Canyon and San Pasqual Valley, on the 

 western border of San Diego County. 



Perognathus fallax pallidus subsp. nov. 



PALLID POCKETMOUSE. 



Type. No. 01,007, United States National Museum. Skin and skull 

 of adult female, from Mountain Spring, half-way up the east slope of the 

 Coast Range Mountains, on the Mexican Boundary Line, in San Diego 

 County, California. Collected May 1C, 1894, by Edgar A. Mearns. 

 Original No. 3520. 



26 BIOL. Soc. WASH. VOL. XIV, 1901. (135) 



