Dicrostonyx unalascensis Merriam, 1900 . Proc. Washington Acad. Sci., 2:25.

TYPE LOCALITY: USA, Alaska, Umnak Island .

DISTRIBUTION: Umnak and Unalaska islands of Aleutian Archipelago, Alaska, USA.

SYNONYMS: stevensoni .

COMMENTS: Only species of Dicrostonyx to lack molt to white winter pelage and acquistion of snow claws (see Rausch and Rausch, 1972).