NORTH AMERICAN LAND MAMMALS. 215 



t*Microtus pennsylvanicus labradorius Bailey. 



1898. Microtus pennsylvanicus lahradorius Bailey, Proc. Biol. 

 Soc. Washington, vol. 12, p. 88. April 30, 1898. 



Type Locality. — Fort Chimo, Ungava, Canada. 

 Range. — Known only from the type locality. 



Microtus provectus Bangs. 



1908. Microtus provectus Bangs, Proc. New England Zool. Club, 

 vol. 4, p. 20. March 6, 1908. 



Type Locality. — Block Island, Rhode Island. 



*Microtus drummondii (Audubon and Bachman). 



1854. Arvicola drummondii Audubon and Bachman, Quadr. N. 



Amer., vol. 3, p. 166. 

 1894, Arvicola (Mynomes) microcephalus Rhoads, Proc. Acad. 



Nat. Sci., Philadelphia, p. 286. October 23, 1894. (Lac La 



Hache, British Columbia, Canada.) 

 1897. [Microtus] drummondi Trouessart, Catal, Mamm. viv. 



foss., p. 563. 



1899. Microtus stonei Allen, Bull. Amer. Mus. Nat. Hist., 

 vol. 12, p. 5. March 4, 1899. (Liard River, British Columbia, 

 Canada.) 



Type Locality. — "Valleys of the Rocky Mountains;" probably 

 in the vicinity of Jasper House, Alberta, Canada. 



Range. — From Hudson Bay to the west slope of the Rocky 

 Mountains and Alaska, and from the northern edge of the 

 United States, north to Fort Anderson, Mackenzie, in Canadian 

 and Hudsonian zones. 



*Microtus admiraltiae Heller. 



1909. Microtus admiraltise Heller, Univ. Calif. Publ. Zool., vol. 5, 

 p. 256. February 18, 1909. 



Type Locality. — Windfall Harbor, Admiralty Island, Alaska. 



t*Microtus aphorodemus Preble. 



1902. Microtus aphorodemus Preble, North Amer. Fauna, 



No. 22, p. 52. October 31, 1902. 

 Type Locality. — Barren grounds about 50 miles south of Cape 



Eskimo, near mouth of Thlewiaza River, Keewatin, Canada. 



*Microtus aztecus (Allen). 



1893. Arvicola (Mynomes) aztecus Allen, Bull. Amer. Mus. Nat. 



Hist., vol. 5, p. 73. April 28, 1893. 

 1897. [Microtus] aztecus Trouessart, Catal. Mamm. viv. foss., 



p. 562. 

 Type Locality. — ^Aztec, San Juan County, New Mexico. 



Altitude, 5,900 feet. 

 Range. — ^Valley of the San Juan River in northwest New 



Mexico, in transition zone. 



