MAMMALS 351 



northern America from Hudson Bay to Georgia; westward in the 

 United States to eastern Kansas and in Canada to Alaska. 



Subspecies of M. monax 



M. m. monax (L.). Middle eastern States from New Jersey to 

 western Iowa and eastern Oklahoma; southward to western North 

 Carolina and northern Georgia and Alabama. 



M. m. preblorum Howell. Colors paler; length 515 mm.: New 

 England; northward to southern Maine and central Vermont. 



M. m. rufescens How. Colors redder; length 548 mm.: New York 

 State westward through Michigan to eastern North Dakota; western 

 Massachusetts. 



M. m. canadensis (Erxleben). Size small; colors strongly reddish; 

 length 513 mm.: northern Michigan, Wisconsin, Minnesota and New 

 England, and Canada; northwestward to Alaska. 



M. m. petrensis How. Like M. m. canadensis , but with a larger 

 skull: northern Idaho and Montana; British Columbia. 



M . flaviventris (Audubon & Bachman). Yellow-bellied woodchuck. 

 Color yellowish brown above, yellowish beneath; sides of neck with 

 large buffy patches; length 600 mm.; tail 170 mm.; hind foot 85 mm.: 

 Rocky Mountain and Pacific States. 



Subspecies of M. flaviventris 



M. f. flaviventris (Aud. & Bach.). The Cascade Range in Oregon 

 and northern Sierras in California. 



M.f. sierrcB How. Colors redder: higher Sierras from Kern River 

 to Mono Lake. 



Al.f. avara (Bangs). Colors paler; size smaller: eastern Oregon and 

 Washington. 



M.f. parvula How. Size smaller; colors Hke M.f. sierrce but paler: 

 central Nevada. 



M.f. engelhardti Allen. Size smaller; under parts darker: Utah and 

 southern Idaho. 



M. f. nosophora How. Colors more ochraceous above and redder 

 below that M. f. engelhardti: mountain regions of Montana, Idaho and 

 Wyoming. 



M. f. dacoia (Merriam). Color Hke M.f. nosophora, buffy above; 

 size large; length 643 mm: Black Hills to Bridger Pass, Wyoming. 



M.f. luteola How. Size large; under parts yellowish: mountains of 

 northern Colorado and southern Wyoming. 



