MICROTUS. 247 



a. J\IicTot~iis chrotorrhinus TUTUS Bangs. 



Microtus chrotorrhinus ravus Bangs, Proc. Biol. Soc. Wash., xn, 

 1898, p. 188. Elliot, Syn. N. Am. Mamm., F. C. M. Pub., n, 

 1901, p. 193. Zool. Ser. 

 GRAY ROCK MEADOW VOLE. 



Type locality. Black Bay, north shore of the Strait of Belle Isle, 

 Labrador. 



Geogr. Disir. Known only from the type locality. 



596. Microtus borealis (Richardson). 



Arvicola borealis Rich., Zool. Journ., in, 1828, p. 517. 



Microtus borealis Elliot, Syn. N. Am. Mamm., F. C. M. Pub., n, 



1901, p. 194. Zool. Ser. 

 NORTHERN MEADOW VOLE. 



Type locality. Great Bear Lake, Mackenzie, Canada. 

 Geogr. Distr. Arctic America. Range unknown. 



Subgenus B. Lagurus. 



597. Microtus pauperrimus (Cooper). 



Arvicola paiiperrima Cooper, Amer. Nat., n, 1868, p. 535. 

 Microtus pauperrimus Elliot, Syn. N. Am. Mamm., F. C. M. 



Pub., n, 1901, p. 195. Zool. Ser. 

 PIGMY MEADOW VOLE. 



Type locality. Plains of the Columbia near the Snake River, 

 southwestern Washington. 



Geogr. Distr. Washington and Oregon, central Idaho, and the 

 north slope of the Uinta Mountains, Utah. 



598. Microtus curtatus (Cope). 



Arvicola curtata Cope, Proc. Acad. Nat. Scien. Phil., 1868, p. 2. 



Arvicola decurtata Coues, Mon. N. Am. Rod., 1877, p. 215. 



Microtus curtatus Elliot, Syn. N. Am. Mamm., F. C. M. Pub., n, 



1901, p. 195, fig. 39. Zool. Ser. 

 SHORT-TAILED MEADOW VOLE. 



Type locality. Pigeon Spring, Mount Magruder, Nevada. 



Geogr. Distr. Eastern California, north of Death Valley and 

 western Nevada. 



599. Microtus pallidus (Merriam). 



Arvicola pallidus! Merr., Amer. Nat., xxn, 1888, p. 702. 

 Microtus pallidus Elliot, Syn. N. Am. Mamm., F. C. M. Pub., n. 



1901, p. 195. Zool. Ser. 

 PALLID MEADOW VOLE. 



Type locality. Fort Buford, Howard County, North Dakota. 

 Geogr. Distr. North Dakota, Montana, north to Calgary, Alberta. 



