326 CALIFORNIA ACADEMY OF SCIENCES [Pitoc. 4tb Ser. 



Rajigc — Lower and Upper Sonoran zones on the Mohave 

 Desert, north through the Inyo region, south to north base 

 of San Bernarchno Mountains, west to Antelope Valley, in 

 northern Los Angeles County (Mus. Vert. Zool.). 



Thomomys albatus Grinnell 

 Imperial Valley Pocket Gopher 



Original' description — Thomomys albatus Grinnell, Univ. 

 Calif. Publ. Zool., 10. June 7, 1912, pp. 172, 173. 



Type locality — California side of lower Colorado River at 

 the old Hanlon Ranch, near rPilot Knob, Imperial County. 



Synonyms — Thomomys fukits. part; Thomomys pcrpal- 

 lidus, part. 



Range — Lower Sonoran zone in the delta area on the 

 Colorado Desert in Imperial County, from near Pilot Knob 

 west to Carrizo Creek and north to Salton Sea (Grinnell, 

 supra cit., pp. 173, 174). 



Thomomys perpallidus ^lerriam j 

 Pnlm Springs Pocket Gopher 



Original description — Thomomys talpoidcs perpallidus Mer- 

 riam, Science, 8, December 24, 1886, p. 588. 



Type locality — Palm Springs, Riverside County, California 

 (see Stephens, Calif. Mammals, 1906, p. 138). 



Synonyms — Thomomys fuk'us perpallidus; Pallid Pocket 

 Gopher; Pale-colored Gopher. 



Range — Lower Sonoran zone at extreme northwest border 

 of Colorado Desert in vicinitv of Palm Springs, Riverside 

 County (Grinnell, Univ. Calif.'Publ. Zool., 10, 1912, p. 173). 



Thomomys cabezonae ^lerriain 

 Cibezon Pocket Gopher 



Original description — Thomomys cabezonae Merriam, Proc. 

 Biol. Soc. Wash., 14, July 19, 1901, p. 110. 



Type locality — Cabezon, San Gorgonio Pass, Riverside 

 County, California. 



Range — Lower and Upper Sonoran zones in San Gorgonio 

 Pass and adjacent foothills, Riverside County (Mus. Vert. 

 Zool.). 



