NORTH AMERICAN RECENT MAMMALS. 397 



Genus DICROSTONYX Gloger.^^ 

 (Collared Lemmings.) 

 1841. Dicrostonyx Gloger. Gemeinn. Hand- u. Hilfsbuch d. 

 Naturgesch., p. 97. Type, an American species, probably Mus 

 Jiudsonius Pallas. 



Subgenus DICROSTONYX Gloger. 



*Dicrostonyx hudsonius (Pallas). 



1778. Mus Jiudsonius Pallas, Nov. Sp. Quadi'. Glir. Ord., p. 208. 



1897. Dicrostonyx Jiudsonius Bai^gs, Proc. Biol. Soc. Washington, 

 vol. 11, p. 237. September 17, 1897. 



Type Locality. — Labrador, Canada. 



Range. — This species is confined, so far as known, to the barren- 

 ground area of Labrador Peninsula, from (probably) the 

 Straits of Belle Isle on the southeast to about the latitude of 

 Great Whale River (55° N.) on the west side. It is also found 

 on some of the small islands along the eastern side of Hudson 

 Bay, but on the west side of the bay its place is taken by D. r. 

 ricJiardsoni. 



Subgenus MISOTHERMUS Hensel. 



1855. MisotJiermus Hensel, Zeitschr. Deutsch. geolog. Gesellsch, 

 vol. 7, p. 492. Type, Mus torquatus Pallas. 



*Dicrostonyx rubricatus rubricatus (Richardson). 



1839. Arvicola rubricatus Richardson, Zool. Beechey's voyage, 

 p. 7. 



1885. Cuniculus torquatus True, Proc. U. S. Nat. Mus., vol. 7 

 (1884), p. 596. 1885. (Part.) 

 tl900. Dicrostonyx nelsoni Merriam, Proc. Washington Acad. 

 Sci., vol. 2, p. 25. March 14, 1900. (St. Michael, Norton 

 Sound, Alaska.) 



1900. Dicrostonyx Jiudsonius alascensis Stone, Proc. Acad. Nat. 

 Sci. Philadelphia, p. 37. March 24. 1900. (Point Barrow, 

 Alaska.) 



1919. Dicrostonyx rubricatus G. M. Allen, Bull. Mus. Comp. 

 Zool., vol. 62, p. 518. February, 1919. 



Type Locality. — American side of Bering Strait, Alaska. 



Range. — In general this species [subspecies] is found on the 

 barrens of northern Alaska, including the peninsula and east- 

 ward along the Arctic coast of Mackenzie to Coronation 

 Gulf. Nelson found it from the mouth of Kuskoquim River, 

 Bering Sea, northward. He obtained a few at St. Michael, 

 Norton Sound, and found it more plentiful about Bering 

 Strait than at any other place he visited. It occurs on the 

 islands of the Strait and coastwise to Point Barrow, and 

 eastward. There are specimens in the Museum of Comparative 

 Zoology from Herschel Island, and from Baillie Island. The 

 limits of its range to the northeast are yet to be traced. 



» Revised by G. M. Allen, Bull. Mus. Comp. Zool., vol. 62, pp. 509-542, February, 1919. 



