FIELD BOOK OF MAMMALS 



British Coltimbia Woodchuck. — Marmota monax petrensis 

 Howell. 

 Resembling canadensis but with different cranial characters, 

 skull larger and longer. Found in "Interior ranges of 

 southern British Columbia and adjacent parts of United 

 States, from Barkerville, British Columbia, south to Thomp- 

 son Pass, Idaho." (Howell) 



Fig. 45. Distribution of the subspecies of Marmota monax, 

 after A. H. Howell 



1. Marmota monax ochracea 



2. Marmota monax petrensis 



3. Marmota monax canadensis 



4. Marmota monax ignava 



5. Marmota monax rufescens 



6. Marmota monax preblorum 



7. Marmota monax monax 



Ochraceous Woodchuck. — Marmota monax ochracea (Swarth). 

 Resembling canadensis but with longer and narrower skull. 

 Color ochraceous above, tawny to hazel below. Found in 

 "Interior mountain ranges of Yukon and northern British 

 Columbia, from Fortymile Creek south to the Babine 

 Mountains (and Stuart Lake ?)." (Howell) 



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