RODENTIA: CRICETIDAE 581 



Genus HERPETOMYS 36 Merriam 

 1898. Herpetomys Merriam, Proc. Biol. Soc. Washington, vol. 12, p. 107, 

 Apr. 30, 1898. (Type Microtus guatcmalensis Merriam.) 



Herpeiomys guatemalensis (Merriam) f* 



1898. Microtus guatemalensis Merriam, Proc. Biol. Soc. Washington, vol. 12, 

 p. 108, Apr. 30, 1898. 



1941. Herpetomys guatemalensis Ellerman, The families and genera of living 



rodents, vol. 2, p. 586, Mar. 21, 1941. 

 Type Locality. — Todos Santos, Huehuetenango, Guatemala. Altitude, 10,000 

 feet. Range.- — Known from type locality only. 



Genus MICROTUS 37 Schrank (meadow-mice) 

 1798. Microtus Schrank, Fauna Boica . . ., vol. 1, Abth. 1, p. 72. (Type, 

 Microtus terrestris Schrank — Mus arvalis Pallas.) 



Subgenus CHILOTUS M Baird 



1858. Chilotus Baird, Mammals, in, Rep. Expl. Surv. Railr. to Pacific, vol. 



8, pt. 1 (Washington, 1857), p. 516, July 14, 1858. (Type, Arvicola 



oregoni Bachman.) 

 Microtus oregoni oregoni ( Bachman ) * 



1839. Arvicola oregoni Bachman, Journ. Acad. Nat. Sci. Philadelphia, vol. 



8, pt. 1, p. 60. 

 1884. Arvicola oregonus True, Proc. U. S. Nat. Mus., vol. 7 (App., Circ. 29), 



p. 597, Nov. 29, 1884. 



1896. Microtus oregoni Miller, North Amer. Fauna No. 12, p. 9, July 23, 1896. 



1899. Microtus morosus Elliot, Field Columb. Mus. Publ. 30, Zool. Ser., 

 vol. 1, p. 227, Feb. 2, 1899. (Boulder Lake, Olympic Mountains, Clallam 

 County, Wash. Altitude, about 5,000 feet.) 



1920. Microtus oregoni cantwelh Taylorf, Journ. Mamm., vol. 1, No. 4, p. 



180, Aug. 24, 1920. (Glacier Basin, Mount Rainier, Pierce County, 



Wash. Altitude, 5,935 feet.) 

 Type Locality. — Astoria, Clatsop County, Oreg. Range. — Humid coast belt 

 from Fort Bragg and Mendocino City, Mendocino County, and interiorly to 

 Hoopa Valley and near Fair Oaks, Humboldt County, Calif. (Grinnell, Univ. 

 California Publ. Zool., vol. 40, No. 2, p. 191, Sept. 26, 1933), northward west 

 of Cascade Mountains in Oregon, and in the Cascade Mountains, Olympic 

 Mountains, and lowlands of western Washington to northern Puget Sound (Dal- 

 quest, Univ. Kansas Publ. Mus. Nat. Hist., vol. 2, p. 357, Apr. 9, 1948). 



Microtus oregoni bairdi Merriamf * 



1897. Microtus bairdi Merriam, Proc. Biol. Soc. Washington, vol. 11, p. 74, 

 Apr. 21, 1897. 



38 Regarded as a valid genus by Ellerman, The families and genera of living rodents, vol. 2, 

 p. 586, Mar. 21, 1941. 



" Revised by V. Bailey North Amer. Fauna No. 17, pp. 1-86, June 6, 1900. 



a Subspecies of Microtus oregoni reviewed by Hatfield and Hooper, Murrelet, vol. 16, 

 No. 2, pp. 33-^34, May 1935. 



213756—55 38 



