MICROTUS. 241 



c. Miorotux '*! ifoi'iiicu x coitxf /-ictus Bailey. 



Microtus californicus constrictus Bailey, N. Am. Faun., No. 17, 



1900, p. 36. Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 



1901, p. 186. Zool. Ser. 

 COAST MEADOW VOLE. 



Type locality. Gape Mendocino, Humboldt County, California. 

 Geogr, Distr. Coast region near Cape Mendocino, California. 



574. Microtus edax (Le Conte). 



Arvicola edax Le Conte, Proc. Acad. Nat. Scien. Phil., 1853, p. 405. 

 Microtus edax Elliot, Syn. N. Am. Mamm., F. C. M. Pub., n, 1901, 



p. 187. Zool. Ser. 

 TULE MEADOW VOLE. 



Type locality. California south of San Francisco. 



Geogr. Distr. San Joaquin and Sacramento Valleys, California. 



575. Microtus scirpensis Bailey. 



Microtus scirpensis Bailey, N. Am. Faun., No. 17, 1900, p. 38. 

 Elliot, Syn. N. Am. Mamm., F. C. M. Pub., n, 1901, p. 187. 

 Zool. Ser. 

 DESERT MEADOW VOLE. 



Type locality. Amargosa River, near Nevada line, Inyo County, 

 California. 



Geogr. Distr. Known only from the type locality. 



576. Microtus operarius (Nelson). 



Arvicola operarius Nelson, Proc. Biol. Soc. Wash., vm, 1893, 



P- 139- 

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



n, 1901, p. 187. Zool. Ser. 

 TUNDRA MEADOW VOLE. 



Type locality. St. Michaels, Norton Sound, Alaska. 



Geogr. Distr. Coast tundras of Bering Sea from Cape Vancouver 

 to Bering Straits, including Nelson, St. Michaels, and Stewart Islands; 

 eastward in Alaska to Anderson River. 



577. Microtus macfarlanii Merriam. 



Microtus macfarlani Merr., Proc. Wash. Acad. Scien., n, 1900, 

 p. 24. Elliot, Syn. N. Am. Mamm., F. C. M. Pub., n, 1901, 

 p. 187. Zool. Ser. 

 MACFARLANE'S MEADOW VOLE. 



Type locality. Fort Anderson, Anderson River, Mackenzie, 

 Canada. 



Geogr. Distr. Tundra region of Arctic America, east to the Mac- 

 kenzie River. 



