COLLARED LEMMING 



Enemies. — Hawks, Owls, Ravens, Weasels, Foxes, Lynxes, 

 Wolverines. 



Species and Subspecies of the Genus Dicrostonyx. 

 Subgenus Dicrostonyx 



Labrador Collared Lemming. — Dicrostonyx hudsonius (Pallas). 

 As described above. "This species is confined, so far as 

 known, to the barren-ground area of the Labrador Penin- 

 sula, from (probably) the Straits of Belle Isle on the south- 

 east 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 Z). r. richardsoni." (G. M. 

 Allen) 



Subgenus Misothermus 



Alaskan Collared Lemming. — Dicrostonyx ruhricatus ruhri- 

 catus (Richardson). 

 Brighter colored than hudsonius. Upperparts (summer) 

 chestnut, grizzled with white; lower back grizzled whitish 

 and blackish; nose to nape black and continuous as a 

 narrow, black, median stripe to base of tail ; ears tufted with 

 rusty; hips grayish; feet and tail whitish; underparts 

 washed with orange buff or (less frequently) whitish. 

 Winter pelage white. Total length, 6.1 inches; tail verte- 

 brae, .76 inch; hind foot, .80 inch. Found on "the barrens of 

 northern Alaska, including the peninsula and eastward 

 along the Arctic coast of Mackenzie to Coronation Gulf." 

 (G. M. Allen) 



Richardson Collared Lemming. — Dicrostonyx ruhricatus 

 richardsoni (Merriam). 

 Without such a bright and contrasted color pattern as 

 typical ruhricatus. Upperparts (summer) varying from 

 ruddy gray to brownish ; buff -yellow on sides of nose and 

 flanks ; grizzled black and buff y from nose to tail ; tawny on 

 ears and on shoulders; feet and tip of tail whitish, washed 

 with buffy; underparts washed with pale cinnamon-buff; 

 band across throat tawny. Winter pelagje white. Total 

 length, 5.8 inches; tail vertebrse, .56 inch; hind foot, .78 

 inch. Found in Barren Grounds from Fort Churchill, Hud- 

 son Bay to Aylmer Lake, western Keewatin and Artillery 

 Lake, eastern Mackenzie and north almost to Coronation 

 Gulf on the Arctic coast. 



Unalaska Collared Lemming. — Dicrostonyx ruhricatus unalas- 



censis (Merriam). 



"Closely related to ruhricatus from which it differs in its 



relatively longer and more slender rostrum, its weaker, less 



broadly rounded zygomata, and slightly more protruding 



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