NORTH AMERICAN RECENT MAMMALS. 233 



♦Glaucomys sabrinus canescens Howell. 



1915. Glaucomys sabrinus canescens Howell, Proc, Biol, Soc. 



Washington, vol. 28, p. 111. Maj 27, 1915. 

 Type Locality. — Portage la Prairie, Manitoba, Canada. 

 Range. — Southern Manitoba and eastern North Dakota; Black 



Hills, South Dakota; and Bear Lodge Mountains, Wyoming; 



exact limits unknown. 



♦Glaucomys sabrinus bangsi (Rhoads). 



1897. Sciuropterus alpinus hangsi Rhoads, Proc. Aoad. Nat. 

 Sci. Philadelphia, p. 321. June, 1897. 



1918. Glaucomys sabrinus bangsi Howell, North Amer. Fauna, 

 No. 44, p. 38. June 13, 1918. 



Type Locality. — Idaho County, Idaho. 



Range. — Mountains of central Idaho, eastern Oregon, south- 

 western Montana, and western Wyoming, north to vicinity of 

 Flathead Lake, Montana; southern limits unknown. 



*Glaucomys sabrinus alpinus (Richardson). 



1828. Pteromys alpinus Richardson, Zool. Journ., vol. 3, p. 519. 



1897. Sciuropterus alpinus Rhoads, Proc. Acad. Nat. Sci.* Phila- 

 delphia, p. 319. July 19, 1897. 



1918. Glaucomys sabrinus alpinus Howell, North Amer. Fauna, 

 No. 44, p. 40. June 13, 1918. 



Type Locality.— Jasper House, Alberta, Canada. (See Howell, 

 North Amer. Fauna, No. 44,- p. 40. June 13, 1918.) 



Range. — Rocky Mountain region of Alberta and British Colum- 

 bia, from vicinity of Henry House, north at least to Peace 

 River and Babine Lake, British Columbia (limits of range 

 unknown) . 



t* Glaucomys sabrinus yukonensis (Osgood). 



1900. Sciuropterus yukonensis Osgood, North Amer. Fauna, 

 No. 19, p. 25. October 6, 1900. 



1918. Glaucomys sabrinus yukonensis Howell, North Amer. 

 Fauna, No. 44, p. 41. June 13, 1918. 



Type Locality. — Camp Davidson, Yukon River, near Alaska- 

 Canada boundary, Yukon, Canada. 



Range. — Yukon River region, from vicinity of Mayo Lake, 

 Yukon (head of Stewart River), to Tanana, Alaska; exact 

 limits unknown. 



t*Glaucomys sabrinus zaphseus (Osgood). 



1905. Sciuropterus alpinus zaphseus Osgood, Proc. Biol. Soc. 



Washington, vol. 18, p. 133. April 18, 1905. 

 1918. Glaucomys sabrinus zaphseus Howell, North Amer. 



Fauna, No. 44, p. 43. June 13, 1918. 



