FIELD BOOK OF MAMMALS 



to the Endicott Range and the mountains lying westward 

 of Fort Good Hope, Mackenzie." (Howell) 

 Glacier Marmot. — Marmota caligata vigilis (Heller). 



Resembling typical caligata but darker in color, more black 

 and brown, variable in color. Known only from type local- 

 ity, west shore of Glacier Bay, Alaska. 

 Montague Island Marmot. — Marmota caligata sheldoni Howell. 

 Smaller than typical caligata and with shorter nasals. 

 Total length, male, 26. 8 inches. Known only from the type 

 locality, Montague Island, Alaska. 

 Robson Hoary Marmot. — Marmota caligata oxytona (Hollister). 

 More bla>.,k above than typical caligata; sexes nearly equal 

 in size. Total length, male, 30 inches; one of the largest of 

 the caligata group, as well as one of the darkest in color. 

 Found in "Interior of northern British Columbia, south- 

 western Mackenzie (?) ,and southern Yukon, from Teslin 

 Lake and Liard River south to Barkerville, British Colum- 

 bia, and the Mount Robson region, British Columbia and 

 Alberta." (Howell) 

 Okanagan Hoary Marmot. — Marfnota caligata okanagana 

 (King). 

 Almost as dark as oxytona but averaging more white. Total 

 length, 28 inches for males. Found in "Gold and Selkirk 

 Ranges, British Columbia, and probably main range of the 

 Rocky Mountains in Alberta from Banff to Henry House; 

 exact limits unknown." (Howell) 

 Montana Hoary Marmot. — Marmota caligata nivaria Howell. 

 Lightest colored of the caligata series, whiter than the other 

 subspecies. Similar in size to oxytona. Found in "Upper 

 slopes (at and above timberline) of high mountains of north- 

 western Montana and of Bitterroot and Salmon River 

 Mountains, Idaho (limits of range imperfectly known). 

 (Howell) 

 Cascade Hoary Marmot. — Marmota caligata cascadensis 

 Howell. 

 Size of oxytona but more white and less black above. Found 

 in "Cascade Range (at and above timberline) from Mount 

 Rainier, Wash., north to southern British Columbia." 

 (Howell) 

 Olympic Marmot.— Marmota olympus (Merriam). 



Large, total length, male, 29-30 inches. Browner than the 

 forms of caligata; above, brownish mixed with white. 

 Found in "Upper slopes of the Olympic Mountains, Wash., 

 above timberline (from about 4,000 feet altitude to near 

 summits of peaks)." (Howell) 

 Vancouver Island Marmot.^ — Marmota vancouverensis Swarth. 

 "Entire body, legs, and tail dark Vandyke-brown, the 

 underfur being of the same color, the long hairs more 

 blackish and glossy." (Howell) Total length, male, 26-28 

 inches. Found on Vancouver Island, British Columbia. 



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