342 VERTEBRATE ANIMALS OF THE UXiXED STATES 



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

 England; northward to southern Maine and central Vermont. 



M. ni. 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 and Bachman). Yellow-bellied wood- 

 chuck. Color yellowish brown above, yellowish beneath; sides of neck 

 with large buffy patches; length 700 mm.; tail 170 mm.; hind foot 85 

 mm. : Rocky Mountain and Pacific States. 



Subspecies of M. flaviventris 



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

 and northern Sierras in California. 



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

 to Mono Lake. 



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

 Washington. 



M.J. parvula How. Size smaller; colors like M.f. sierra 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. dacota (Merriam). Color like M.f. nosophora, bufify above; 

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



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

 northern Colorado and southern Wyoming. 



M.f. warreni How. Size large; colors deep red with buff: western 

 Colorado. 



M.f. ohscura How. Size large; color dark brown, mixed with white: 

 northern New Mexico and southern Colorado. 



M. caligata (Eschscholtz). Whistler. Color of fore part of back 

 white, hinder and sides of body part cinnamon, mixed with black; under 

 parts white; feet and top of head black; length 755 mm.; tail 250 mm.; 

 hind foot 110 mm.: Alaska to Washington and Montana. 



