278 U. S. NATIONAL MUSEUM BULLETIN 205 



Type Locality. — One mile north of Susanville, Lassen County, Calif. Alti- 

 tude, 4,400 feet. Range. — Upper (western) part of valley of east-flowing Susan 

 River, Lassen County, Calif. Zonal range, Upper Sonoran and Lower Transi- 

 tion; vertical range, 4,200 to 4,800 feet. 



Thomomys bottae acrirostratus Grinnell 



1935. Thomomys bottae acrirostratus Grinnell, Univ. California Publ. Zool., 

 vol. 40, No. 11, p. 408, Nov. 14, 1935. 



Type Locality. — Valley of Mad River, 7 miles above Ruth, Trinity County, 

 Calif. Altitude, 2,700 feet. Range. — Interior valleys of northwestern Cali- 

 fornia altogether west of Sacramento Valley, south of Salmon-Scott-Trinity 

 Mountain Divide, and interiorly of humid coast belt; most typically, valleys 

 of upper Mad River and Trinity River, in Trinity County. Intergradient to east 

 toward navus, of floor of upper Sacramento Valley, to south toward bottae, of 

 San Francisco Bay region, and to west toward laticeps and minor, of humid coast 

 belt. 



Thomomys bottae navus Merriamf* 



1901. Thomomys leucodon navus Merriam, Proc. Biol. Soc. Washington, vol. 

 14, p. 112, July 19, 1901. 



1915. Thomomys bottae navus V. Bailey, North Amer. Fauna No. 39, p. 49, 

 Nov. 15, 1915. 



Type Locality. — Red Bluff, Tehama County, Calif. Range. — Floor of Sacra- 

 mento Valley and immediately adjacent foothills, from Battle Creek, Tehama 

 County, south as far as Tracy Lake, San Joaquin County; vertical range, from 

 near sea level at Davis, Yolo County, up to 1,500 feet at Mokelumne Hill, Cala- 

 veras County (Grinnell, Univ. California Publ. Zool., vol. 40, No. 2, p. 138, 

 Sept. 26, 1933). 



Thomomys bottae agricolaris Grinnell 



1935. Thomomys bottae agricolaris Grinnell, Univ. California Publ. Zool., vol. 

 40, No. 11, p. 409, Nov. 14, 1935. 



Type Locality. — Stralock Farm, 3 miles west of Davis, Yolo County, Calif. 

 Range. — Lower west side of Sacramento Valley, inclusive of parts of Yolo and 

 Solano Counties, Calif.; inland from near Sacramento River above flood level 

 west into foothills of Coast Ranges. Zonal range, Lower and Upper Sonoran. 



Thomomys bottae awahnee Merriamf* 



1908. Thomomys alpinus awahnee Merriam, Proc. Biol. Soc. Washington, 

 vol. 21, p. 146, June 9, 1908. 



1935. Thomomys bottae awahnee Goldman, Proc. Biol. Soc. Washington, 

 vol. 48, p. 154, Oct. 31, 1935. 



Type Locality. — Yosemite Valley, near old Sentinel Hotel, Mariposa County, 

 Calif. Altitude, 4,000 feet. Range. — Western middle flanks of Sierra Nevada, 

 from Sequoia, Tuolumne County, south to Cannell and Taylor Meadows, Tulare 

 County; thence interruptedly even to Tehachapi Peak, Kern County, Calif.; 

 zonal range, chiefly Transition; vertical range, 3,500 to 8,000 feet (Grinnell, 

 Univ. California Publ. Zool, vol. 40, No. 2, p. 142, Sept. 26, 1933). 



Thomomys bottae mewa Merriamf* 



1908. Thomomys mewa Merriam, Proc. Biol. Soc. Washington, vol. 21, p. 146, 

 June 9, 1908. 



