Howell — Ten New Marmots from North America. 17 



Marmota caligata cascadensis sub.sp. nov. 



CASCADE HOARY MARMOT. 



Type from Mt. Rainier, Washington (altitude 6000 feet). Adult female, 

 No. 90,lf!4, U. S. National Museum (Biological Survey Collection); 

 August 11, 1897, W. K. Fisher; original number, 422. 



Characters. — Size large (equalling olympus and " sibila,"* larger than 

 caligata); color similar to that of caligata, but head and feet usually 

 browner and underparts darker; skull similar to that of sibila, but 

 relatively broader across zygomata and inter-orbital region ; decidedly 

 larger than that of either caligata or okanagana.\ 



Measurements. — Adult female (type): Total length, 740; tail vertebrae, 

 230; hind foot, 107. Skull: Adult male from Cascade River (near 

 head), "Washington: Condylo-basal length, 100.2; zygomatic breadth, 

 69. S; breadth of rostrum, 24.5. 



Remarks. — The Cascade Marmot dift'ers from the Olympic Marmot in 

 being much whiter, and in skull characters; from ohanagana of the Sel- 

 kirk and Gold Ranges and sibila of northern British Columbia in 

 whiter and browner (less black) coloration above; and from caligata in 

 much larger size. It ranges from Jfount Rainier, A\^ashington, north to 

 the Mount Baker Range, British Columbia. 



Marmota cafigata nivaria subsp. nov. 



MONTANA HOARY MARMOT. 



Type from mountains near Upper St. Mary's Lake, Montana (altitude 

 about 6100 feet). Adult female, No. 72,2:», U. S. National Museum 

 (Biological Survey Collection); ]\Iay 27, 1895, A. H. Howell; original 

 number, 23. 



Characters. — Similar in size and skull characters to sibila, but colors 

 much whiter, both above and below; skull closely similar to that of 

 sibila, possibly averaging a little shorter ; compared with cascadensis the 

 premaxillse are broader. 



Measurements. — Average of 4 adult females from type locality: Total 

 length, 751; tail vertebrae, 2l'4; hind foot, 105. Skull : Average of 4 

 adult females from same locality: Condylo-basal length, 102; zygomatic 

 breadth, 65.7; breadth of rostrum, 23. 



Remarks. — This form, although closely resembling sibila in skull char- 

 acters, differs widely from it in color, being, indeed, the whitest member 

 of the group. In addition to the series from the type locality, specimens 

 have been examined from the Bitterroot and Salmon River Mountains, 

 Idaho. 



'Marmota sibila Hollister, Smiths. Misc. Coll., vol. 56, No. 35, 1912, p. 1; type 

 locality, Moose Pass, Alberta (not Arctomys sibila Wolf). 



t Arctomys okanaganus King, Narr. Journ. to Shores of the Arctic Ocean, II, 1836, p. 

 236; type locality: The region occupied by the Okanagan Indians, " on the borders of 

 the Eocky Mountains * * * between the Columbia and Fraser Rivers "—hereby 

 fixed in the Gold Range, British Columbia. 



