BIRDS OP NORTH AND MIDDLE AMERICA. 



629 



Adult ?naZg.— Length (skins), 165-195 (177); wing, 133.5-139 

 (13G.3); tail, 65-70 (67.4); culmen (from cere), 11-13 (12). « 



Adult female.— Length, (skins), 175-202 (185); wing, 135-146 

 (141.7); tail, 69-73 (71.3); culmen (from cere), 11-14 (12.5).* 



Northern North America (except Ai-ctic and Hudsonian zones and 

 northern portion of Canadian Zone), breeding in Canadian and Tran- 

 sition zones and extreme northern portion of Upper Austral Zone, from 

 Nova Scotia and New Brunswick westward through Quebec, Ontario 

 (north to Moose Factory), Manitoba (Red River; Winnipeg), and 

 Alberta (30 mUes southwest of Edmonton), to British Columbia (Vic- 

 toria; Comox; Queen Charlotte Islands) and extreme southern 

 Alaska (Mitkof Island), southward to Massachusetts (Braintree; 

 Tyngsboro; etc.), Pennsylvania, mountains of Maryland (Garrett 

 County), northern Indiana (CarroU and Newton counties), northern 

 Illinois (Cook County), southern Nebraska, Colorado (Loveland; 

 Arkins), New Mexico, central Arizona (San Francisco Mountain), 

 higher Sierra Nevada of California (head of South Fork of American 

 River; Donner Lake), and Oregon (Washington County) — probably 

 on higher mountains of Mexico and Guatemala; in winter migrating 

 irregularly (according to severity of the season) southward to Virginia, 



a Eight specimens. 



b Nine epecimens. 



Locality. 



MALES. 



Two adult males from Pennsylvania (1) and Maryland (1) 135.2 65.2 11 



Thi'ee adult males from North Dakota (1), Montana (1), and Wyoming (1) i;i6.3 67.2 12.2 



One adult male from British Columbia (Victoria) i:i5. 5 67.5 12.5 



One adult male from Queen Charlotte Islands (type of Nyctala acadica scotxa 



Osgood) 136.5 70 12 



One adult male from Queratero, Mexico 139 70 13 



FEMALES. 



Two adult females from District of Columbia 139 71 11.7 



Three adult females from Montana (2) and Colorado (1) 143.8 71.7 13 



Two adult females from Washington and Oregon 137.2 69.5 12.5 



One adult female from California (Ft. Tejon) 145 73.5 12.5 



One adult female from southern Jalisco, Mexico 145 72.5 12.5 



___^________ 



I am not able to make out any geographic variation in this species except a slight 

 average difference in the hue of the brown of the upper and under parts, which is 

 reddest in examples from the Pacific coast district (British Columbia to southern 

 Mexico), more grayish brown in those from the Rocky Mountains, intermediate, but 

 nearer the former, in those from the Atlantic side. It is possible that an adequate 

 series may show these differences to be sufficiently marked and constant to warrant 

 Bubspecific subdivision. The only peculiarities that I am able to obsers'e in the type 

 of Nyctala acadica scotsea consist in the deep ochraceous-buff auricular region and more 

 reddish brown of the pileum; but I am of the opinion that these characters will not 

 prove constant when more specimens from the Queen Charlotte Islands have been 

 examined. 



Cul- 

 men. 



