RODENTIA: GEOMYIDAE 285 



Thomomys bottae crassus Chattin 



1941. Thomomys bottae crassus Chattin, Trans. San Diego Soc. Nat. Hist., 

 vol. 9, No. 27, p. 274, Apr. 30, 1941. 



Type Locality. — A mile and a half west of Niland, Imperial County, Calif. 

 Altitude, 180 feet. Range. — Northern part of Imperial Valley; vicinity of Niland 

 northeast of Alamo River, east side of Salton Sea, 100 feet or more below sea 

 level in Imperial County. 



Thomomys bottae albatus Grinnell* 



1912. Thomomys albatus Grinnell, Univ. California Publ. Zool., vol. 10, No. 

 8, p. 172, June 7, 1912. 



1933. Thomomys bottae albatus Grinnell, Univ. California Publ. Zool., vol. 

 40, No. 2, p. 143, Sept. 26, 1933. 



Type Locality. — West side of Colorado River, at old Hanlon ranch, near Pilot 

 Knob, Imperial County, Calif. (10 miles west of Yuma, Ariz.). Range. — In 

 California, Colorado River bottomlands and irrigated tracts from Laguna Dam 

 southward to Mexican boundary, and throughout major portion of irrigated 

 land in Imperial Valley, Calif. (Chattin, Trans. San Diego Soc. Nat. Hist., vol. 

 9, No. 27, p. 278, Apr. 30, 1941) ; in Baja California, irrigated section of region 

 south of Mexican boundary to El Major, east to Colorado River and west to 

 limits of gravity water on east base of Cocopah Mountain Range (Huey, Trans. 

 San Diego Soc. Nat. Hist., vol. 10, No. 14, p. 252, Aug. 31, 1945) . 



Thomomys bottae boregoensis Huey* 



1939. Thomomys bottae boregoensis Huey, Trans. San Diego Soc. Nat. Hist., 



vol. 9, No. 15, p. 70, Dec. 8, 1939. 

 1939. Thomomys bottae aderrans Huey, Trans. San Diego Soc. Nat. Hist., 

 vol. 9, No. 15, p. 71, Dec. 8, 1939. (Carrizo Creek, San Diego County, 

 Calif. Regarded as identical with boregoensis by Chattin, Trans. San Diego 

 Soc. Nat. Hist., vol. 9, No. 27, pp. 275-276, Apr. 30, 1941.) 

 Type Locality. — Beatty Ranch, Borego Valley, San Diego County, Calif. 

 Range. — Southern part of Coachella Valley in Riverside County; western quarter 

 of Imperial County, along southwest side of Salton Sea southward at least to 

 vicinity of Coyote Wells; also Borego Valley and vicinity of Carrizo Creek in 

 San Diego County (Chattin, Trans. San Diego Soc. Nat. Hist., vol. 9, No. 27, 

 p. 275, Apr. 30, 1941). 



Thomomys bottae puertae Grinnell* 



1914. Thomomys nigricans puertae Grinnell, Univ. California Publ. Zool., 

 vol. 12, No. 9, p. 315, Nov. 21, 1914. 



1915. Thomomys bottae puertae V. Bailey, North Amer. Fauna No. 39, p. 58, 

 Nov. 15, 1915. 



Type Locality. — La Puerta (Mason's Ranch) , 5 miles west of Vallecitos, at 

 lower end of La Puerta Valley, eastern San Diego County, Calif. Range. — La 

 Puerta and San Felipe Valleys, on desert side of Cuyamaca Mountain Divide, 

 in eastern San Diego County; zonal range, Lower Sonoran; vertical range, 1,900 

 to 2,500 feet (Grinnell, Univ. California Publ. Zool., vol. 40, No. 2, p. 141, 

 Sept. 26, 1933). 



