594 U. S. NATIONAL MUSEUM BULLETIN 205 



Type Locality. — Grizzly Island, Suisun Bay, Solano County, Calif. Range. — 

 San Joaquin and Sacramento River Valleys, from Tulare Lake Basin, Kings 

 County, north at least to Chico, Butte County, and east to near Gait, in San Joaquin 

 County; also west along north side of San Francisco Bay at least to Petaluma, 

 Sonoma County. Vertical range, from sea level up to almost 500 feet; zonal 

 range, Lower and Upper Sonoran. 



Microtus californicus mariposae R. Kellogg* 



1918. Microtus californicus mariposae R. Kellogg, Univ. California Publ. 

 Zool., vol. 21, No. 1, p. 19, Dec. 28, 1918. 



Type Locality. — A mile and three-quarters west of El Portal, Mariposa County, 

 Calif. Altitude, 1,800 feet. Range. — Western foothill region of Sierra Nevada, 

 from Minkler, Fresno County, north to Dutch Flat, Placer County. Vertical 

 range, from 200 feet up to at least 3,800 feet; zonal range, Upper Sonoran and 

 Transition. 



Microtus californicus vallicola V. Bailey f * 



1898. Microtus californicus vallicola V. Bailey, Proc. Biol. Soc. Washington, 

 vol. 12, p. 89, Apr. 30, 1898. 



Type Locality. — Lone Pine Creek, where it cuts through Alabama Hills, near 

 Lone Pine, Inyo County, Calif. Altitude, 4,500 feet. (A. B. Howell, Journ. 

 Mamm., vol. 4, No. 4, p. 266, Nov. 1, 1923.) Range. — Owens Valley region of 

 California, east of Sierra Nevada, from Olancha, Inyo County, north to Benton, 

 Mono County; recorded also from head of Willow Creek in north end of Panamint 

 Mountains, Inyo County. Vertical range, from 3,700 feet up to at least 5,400 feet; 

 zonal range, Lower and Upper Sonoran. 



Microtus californicus scirpensis V. Bailey f* 



1900. Microtus scirpensis V. Bailey, North Amer. Fauna No. 17, p. 38, June 6, 



1900. 

 1918. Microtus californicus scirpensis R. Kellogg, Univ. California Publ. Zool., 



vol. 21, No. 1, p. 24, Dec. 28, 1918. 

 Type Locality. — Spring near Shoshone, on Amargosa River, eastern Inyo 

 County, Calif. Altitude, 1,560 feet. Range. — Known only from small marsh at 

 spring near Shoshone on Amargosa River, in eastern Inyo County. 



Microtus californicus kernensis R. Kellogg* 



1918. Microtus californicus kernensis R. Kellogg, Univ. California Publ. Zool., 

 vol. 21, No. 1, p. 26, Dec. 28 ,1918. 



Type Locality.— Fay Creek, near South Fork of Kern River, Kern County, 

 Calif. Altitude, 4,100 feet. Range. — Drainage basin of Kern River, from 

 Taylor Meadow, Tulare County, southwest to Buena Vista Lake, San Emigdio 

 Creek, and Fort Tejon, in Kern County; vertical range, 290 feet up to 7,000 feet; 

 zonal range, Lower Sonoran to Transition (Grinnell, Univ. California Publ. Zool., 

 vol. 40, No. 2, p. 188, Sept. 26, 1933). 



Microtus californicus mohavensis R. Kellogg 



1918. Microtus californicus mohavensis R. Kellogg, Univ. California Publ. 

 Zool., vol. 21, No. 1, p. 29, Dec. 28, 1918. 



Type Locality. — Victorville, San Bernardino County, Calif. Altitude, 2,700 

 feet. Range. — Moist bottomlands of Mohave River, on Mohave Desert; re- 



