260 LEMMUS. DICROSTONYX. 



631. Lemmus nigripes (True). 



Myodes nigripes True, Proc. U. S. Nat. Mus., xvii, 1894, p. 242. 



Lemmus nigripes Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 

 1901, p. 209. Zool. Ser. 

 Black-footed Lemming. 



Type locality. St. George Island, Pribilof Islands, Bering Sea. 



Geogr. Distr. Known only from the type locality. 



Genus 85. Dicrostoiiyx. Forked-claw Leniininj^s. 



Dicrostonyx Glog., Gem. Hand- u. Hilfsb. Naturg., 1841, pp. xxxi, 



97. Type Mus hudsonius Pallas. 

 Cuniculus Wagl., Nat. Syst. Amph., 1830, p. 121. 

 Myolemmus Pomel, Cat. M^th. Vert. Foss. Bass. Loire, 1854, p. 27. 

 Misothermus Hensel, Zeitsch. Deutsch. Geol. Gesellsch., vii, 1855, 



p. 492. (Part.) 

 Borioikon Poliakoff, Ann. au tome xxxix, M^m. Acad. St. P^tersb., 



No. 2, 1881, p. 35. 

 Tylonyx Schulze, Mamm. Europ. Hel. Abhandl. u. Vortrage 



Gesammtg. Naturw., Berlin, xiv, 1897, p. 83. 



632. Dicrostonyx hudsonius (Pallas). 



Mus hudsonius Pall., Nov. Spec. Quad. Glir. Ord., 1778, p. 208. 



Dicrostonyx hudsonius Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 

 II, 1901, p. 209. Zool. Ser. 

 HuDSONiAN Lemming. 



Type locality. Labrador. 



Geogr. Distr. Labrador. Range unknown. 



a. Dicrostonyx hudsonius nnalascensis (Merriam). 

 Dicrostonyx nnalascensis Merr., Proc. Wash. Acad. Scien., 11, 



1900, p. 25. 

 Dicrostonyx hudsonius unalascensis Elliot, Syn. N. Am. Mamm., 



F. C. M. Pub., II, 1901, p. 210. Zool. Ser, 

 Unalaska Lemming. 



Type locality. Unalaska, Alaska. 

 Geogr. Distr. Range unknown. 



b. Dicrostonyx hudsonius nelsoni (Merriam) . 



Dicrostonyx nelsoni Merr., Proc. Wash. Acad. Scien., 11, 1900*, 



p. 25. 

 Dicrostonyx hudsonius alascensis Stone, Proc. Acad. Nat. Scien. 



PhiL, 1900, p. 37. 



