NEW MAMMALS FROM CANADA, ALASKA, AND 

 KAMCHATKA 



By N. HOLLISTER 



(With Three Plates) 



A study of the larger mammals collected by the Smithsonian party 

 on the Alpine Club of Canada expedition to Jasper Park and the 

 Mount Robson region, during the summer of 191 1, has resulted in 

 the discovery of several unrecognized forms. The hoary marmot 

 and the caribou from the vicinity of Moose Pass prove to be new ; 

 and a thorough study of the caribou in the National Museum collec- 

 tions shows the necessity of recognizing three additional forms. 

 For the subspecies of the eastern woodland caribou found in Kee- 

 watin and Manitoba, Richardson's name sylvestris is revived ; and 

 new species from the Arctic coast of Alaska and from Kamchatka 

 are named. 



MARMOTA SIBILA, sp. nov. 



Type from head of Moose Pass branch of the Smoky River, 

 Alberta; 7,200 feet. Cat. no. 174503, U. S. National Museum. Adult 

 female, skin and skull. Collected August 3, 191 1, by N. Hollister 

 and C. D. Walcott, Jr. Original no. 3871. 



Characters. — A large member of the caligata group ; much larger 

 (as known only by the female) than M. caligata; coloration dark; 

 cheeks ochraceous. Skulls of females equal in size to largest male 

 skulls of caligata. 



Color of type (new coat replacing the worn pelage). — Hair 

 around nose and lips white ; top of nose and malar stripe black ; a 

 whitish strip across forehead between eyes; top of head and nape 

 mixed brown and black ; sides of neck and lower throat ochraceous. 

 Shoulders and forward part of body, above, grizzled, the hairs dull 

 blackish underneath, white above, with brownish-black tips. Posterior 

 part of back (still largely in the old coat) mixed brown, black, and 

 buff. Feet black, the hands with scattering white hairs. Underparts 

 brownish-gray, bright hazel at base of tail. Tail above with black 

 center ; bordered and tipped with dull mummy brown ; beneath Van- 

 dyke brown. Immature specimens differ from young of M. caligata, 



Smithsonian Miscellaneous Collections Vol. 56 No. 35 



