ISrORTH AMERICAN RECENT MAMMALS. 421 



t*Microtus guatemalensis Merriam. 



1898. Microtus guMemalensis Merriam, Proc. Biol. Soc. Wash- 

 ington, vol. 12, p. 108. April 30, 1898. 



Type Locality. — Todos Santos, Huehuetenango, Guatemala. 



Altitude, 10,000 feet. 

 Range. — Known only from the type locality. 



Subgenus CHILOTUS Baird. 



1857. Chilotus Baird, Mamm. N. Amer., p. 516. Type, Arvicola 

 oregoni Bachman. 



*Microtus oregoni oregoni (Bachman). 



1839. Arvicola oregoni Bachman, Journ. Acad. Nat. Sci. Phila- 

 delphia, vol. 8, pt. 1, p. 60. 



1885. Arvicola oregonus True, Proc. U. S. Nat. Mus., vol. 7, 

 (1884), p. 597. 1885. 



1896. Microtus oregoni Miller, North Amer. Fauna, No. 12, p. 

 9. July 23, 1896. 



1899. Microtias morosus Elliot, Field Columb. Mus., publ. 

 30, zool. ser., vol. 1, p. 227. February 1, 1899. (Boulder 

 Lake, Olympic Mountains, Clallam County, Washington. 

 Altitude, about 5,000 feet.) 



Type Locality. — ^Astoria, Clatsop County, Oregon. 

 Range. — Pacific coast region from northern California to Puget 

 Sound. 



t*Microtus oregoni cantwelli Taylor. 



1920. Microtus oregoni cantwelli Taylor, Journ. Mamm., vol. 1, 



p. 180. August 24, 1920. 

 Type Locality. — Glacier Basin, Mount Rainier, Pierce County, 

 Washington. Altitude, 5,935 feet. 



t*Microtus oregoni adocetus Merriam. 



1908. Microtus oregoni adocetus Merriam, Proc. Biol. Soc, 



Washington, vol. 21, p. 145. June 9, 1908. 

 Type Locality. — South Yolla Bolly Mountain, Tehama County, 

 California. 



t*Microtus serpens Merriam. 



1897. Microtus serpens Merriam, Proc. Biol. Soc. Washington, 



vol. 11, p. 75. April 21, 1897. 

 Type Locality. — Agassiz, British Columbia, Canada. 

 Range. — Low country of southern British Columbia and i¥)rth- 



ern Washington between the Cascade Mountains and Puget 



Sound. 



