Vot. IIT] GRINNELL—MAMMALS OF CALIFORNIA 333 
Perognathus penicillatus penicillatus Woodhouse 
Colorado Desert Pocket Mouse 
Original description—Perognathus penicillatus Woodhouse, 
Proc. Acad. Nat. Sci. Phila., 6, December, 1852, pp. 200, 201. 
Type locality—Somewhere near San Francisco Mountain, 
Arizona, possibly Little Colorado Desert (see Osgood, N. 
Amer. Fauna, 18, 1900, p. 45). 
Synonym—Perognathus penicillatus angustirostris Osgood, 
supra cit., p. 47 (type from Carrizo Creek, western edge of 
Colorado Desert, Imperial County, California). 
Range—Lower Sonoran zone on Colorado Desert, west to 
La Puerta, eastern San Diego County, northwest to Cabezon, 
Riverside County, and north along the Colorado River bottom 
to Needles (Mus. Vert. Zool.). 
Perognathus penicillatus stephensi Merriam 
Stephens Pocket Mouse 
Original description—Perognathus stephensi Merriam, Proc. 
Acad. Nat. Sci. Phila., September 27, 1894, p. 267. 
Type locality—Mesquite Valley, northwest arm of Death 
_ Valley, Inyo County, California. 
Range—Lower Sonoran zone on the Mohave Desert: Death 
Valley, Inyo County, south to Victorville, San Bernardino 
County (Elliot, Field Col. Mus., zool. ser., 3, 1904, p. 309; 
itisHViereZool). 
Perognathus fallax fallax Merriam 
San Diego Short-eared Pocket Mouse 
Original description—Perognathus fallax Merriam, N. 
Amer. Fauna, 1, October, 1889, pp. 19, 20. 
Type lpn ieee aehe Canyon, 3 miles southeast of Colton, 
San Bernardino County, California (fide Osgood, N. Amer. 
Fauna, 18, 1900, p. 55). 
Range—Lower Sonoran zone in southern part of the San 
Diegan district, from the Mexican line northwest at least to 
the vicinity of Riverside (Mus. Vert. Zool.). 
