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BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



Adult male.— Wmg 303-354 (325.2) : tail 226.5-280 (245.7) ; culmen 

 from cere 20-26 (21.9); tarsus 67-82.5 (75.4); middle toe without 

 claw 42.5-54.5 (47.5 mm.).^^ 



Adult female. —V^ing 321-368 (333.6); tail 250-301 (278.6); culmen 

 from cere 21.5-26 (23.6); tarsus 72.5-95 (81.1); middle toe without 

 claw 44.5-52 (49.8 mm.).«* 



Range. — Breeds from northwestern Alaska (Nulato, Yukon River, 

 Kuskoquim, Kowak River, etc.), northwestern Mackenzie, northern 

 Alberta, northern Keewatin, Ontario, Quebec, Newfoundland Labra- 

 dor, Newfoundland, and Nova Scotia, south to California (Sequoia 

 National Park), southern Arizona (San Francisco Mountains), New 

 Mexico (Tres Piedras), Sonora, Chilmahua, and Jalisco m Mexico, 

 northwestern Idaho (Fort Sherman), Saskatchewan, Michigan (to 

 Roscommon County), northern New York (Adirondack Mountains), 

 northern New England (south to central Massachusetts), and, in the 

 mountains, to Pennsylvania and western Maryland and Tennessee. 



Winters from central and western Alaska, British Columbia (north 

 to the Cariboo district), Saskatchewan, Ontario, Quebec, and New- 



^3 Twenty-seven specimens from all parts of the range. Although there are 

 no constant geographical variations in size, the following data are of interest: 



'^ Twenty-two specimens: 



