218 BULLETIlsr *79, UNITED STATES NATIONAL MUSEUM. 



t*Microtus calif ornicus calif ornicus (Peale). 



1848. Arvicola californica Peale, U. S. Explor. Exp., vol. 8, 

 mamm. and ornitli., p. 46. 



1897. [ Microtus] californicus Trouessart, Catal. Mamm. viv. f oss., 

 p. 563. 



Type Locality. — Vicinity of San Francisco Bay, California. 



Range. — California, west of the Colorado Desert and the Sierra 

 Nevada, and from Santa Ysabel, San Diego Comity, Califor- 

 nia, north to the Rogue River and Umpqua Valleys, Oregon. 



t*Microtus californicus vallicola Bailey. 



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

 Washington, vol. 12, p. 89. April 30, 1898. 



Type Locality. — Lone Pine, Inyo County, California. 

 Range. — ^Valleys east of the Sierra Nevada, California. Con- 

 fined mainly to upper Sonoran zone. 



t*Microtus californicus constrictus Bailey. 



1900. Microtus californicus constrictus Bailey, North Amer. 



Fauna, No. 17, p. 36. June 6, 1900. 

 Type. — Cape Mendocino, Humboldt Comity, California. 

 Range. — Coast region near Cape Mendocino. 



*Microtus californicus huperuthrus Elliot. 



1903. Microtus californicus huperuthrus Elliot, Field Columb. 



Mus., publ. 74, zool. ser., vol. 3, p. 161. April, 1903. 

 Type Locality. — San Quentin, Lower California, Mexico. 



t*Microtus edax (LeConte). 



1853. Arvicola etZax LeConte, Proc. Acad. Nat. Sci. Philadelphia, 



vol. 6, p. 405. 

 1896. Microtus edax Allen, Bull. Amer. Mus. Nat. Hist., vol. 8, 



p. 268. December 4, 1896. 

 Type Locality. — California, south of San Francisco. 

 Range. — Bottom of the San Joaquin and Sacramento Valleys, 



in lower austral zone. 



t*Microtus scirpensis Bailey. 



1900. Microtus scirpensis Bailey, North Amer. Fauna, No. 17, 



p. 38. June 6, 1900. 

 Type Locality. — Amargosa River, near Nevada line, Inyo 



County, California. 

 Range. — Known only from the type locality. 



