_>:{,-, M1CROTUS. 



Geogr. Distr. Known only from the type locality. 



Genl. ('luir. "Size large; tail very long; ears prominent; bullae 

 very large and globular ; palatine foramina markedly broad and bottle- 

 shaped." 



Color. Similar to that of M. pennsylvanicus , but slightly darker. 



M Allurements. "Total length, 176-198; tail vertebrae, 54-62 ; fore 

 (hind"") foot, 12-13; ear, 12-18." 



il. .MiiTntiix pennsylvanicus inaf/fs/nn (Baird). 



Arricola modesta Baird, N. Am. Mamm., 1857, p. 535. 



Arvicola iuspcnitns Allen, Bull. Am. Mus. Nat. Hist. N. Y., 1894, 



P- 347- 

 M it-rot us pennsylvanicus modestus Elliot, Syn. N. Am. Mamm., 



F. C. M. Pub., ii, 1901, p. 180. Zool. Ser. 

 SA WATCH MEADOW VOLE. 



Type locality. Cochetopa ("Sawatch") Pass, Saguache County, 

 Colorado. 



Geogr. Distr. Rocky Mountains and western plains from New 

 Mexu-o to British Columbia, Canada, and from the Black Hills of 

 South Dakota to central Idaho and the plains of the Columbia. 



e. .MicrntiiK pnmxi/1 nuiicus foiitt o'cutin (Bangs). 



Microtus fontigenus Bangs, Proc. Biol. Soc. Wash., x, 1896, p. 48. 



Microtus pennsylvanicus fontigenus Elliot, Syn. N. Am. Mamm., 



F. C. M. Pub., n, 1901, p. 181. Zool. Ser. 

 FOREST VOLE. 



Type locality. Lake Edward, Quebec, Canada. 



Geogr. Distr. Quebec Province, Canada, west to Peninsula Har- 

 bor and Nepigon, north shore of Lake Superior. 



/'. . Microlux in'iiiixi/1 r<iiii<-ii x In hr<lni'i u x Bailey. 



Mi<-r<>lns pcniisylranicits labradorius Bailey, Proc. Biol. Soc. Wash., 

 xn, 1898, p. 88. Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 

 n, 1901, p. 181. Zool. Ser. 

 LITTLE LABRADOR MEADOW Voi.i:. 



I'ype locality. Fort Chimo, Ungava, Labrador. 

 Geogr. Distr. Known only from the type locality. 



561. Microtus drummondi (Audubon & Bachman). 



Arvi.-old tlrnmniondi Aud. & Bachm., Quad. N. Am., in, 1854, 



p. 166. 

 Arvicola (Myiiomcs) ini< rt>< cfhaliix UliM.-uls, Proc. Acad. Nat. 



Scien. I'liil., 1894, p. 286. 

 Microtus stonei Allen, Bull. Am. Mus. Nat. Mist. N. Y., 1899, p. 5. 



