BIRDS OF NORTH AND MIDDLE AMERICA. 751 



Adult rmle.— Wing, 355-360 (357.5); tail, 225-245 (235); culmen 

 (from cere), 29." 



Adult female.— Wing, 355-390 (371.5); tail, 225-240 (232); cul- 

 men (from cere), 28-31 (29.3).^ 



Coast district of northwestern Alaska, from Bristol Bay to (or 

 beyond) Kotzebue Sound (Alognagik River; Port Huron; St. 

 Michaels; Lower Yukon; Kowak River). 



Bubo virginianus subarcticus (not Bubo subarcticus Hoy) Nelson, Cruise "Cor- 



win" in 1881 (1883), 76 (coast of Bering Sea, Alaska); Rep. Nat. Hist. Coll. 



Alaska, 1887, 152, part (St. Michaels, etc.).— Turner, Contr. Nat. Hist. 



Alaska, 1886, 162, part (St. Michaels, etc.). 

 Asia magellanicus algistus Oberholser, Proc. U. S. Nat. Mus., xxvii, Jan. 22, 



1904, 190 (St. Michaels, Alaska; coll. U. S. Nat. Mus.). 

 Bubo virginianus algistus American Ornithologists' Union Committee, Auk, 



XXV, 1908, 347; Check List, 3rd ed., 1910, 176.— Grinnell (J.), Condor, xii, 



1910, 42 (St. Michaels). 



BUBO VIRGINIANUS WAPACUTHU (Gmelin). 



ARCTIC HORNED OWL. 



Similar to B. v. occidentalis but paler, the upper parts with much 

 more of white and less of blackish, with the ochraceous admixture 

 paler (light buffy) ; under parts less heavily barred, the feet paler, 

 usually immaculate buff or buffy white. 



Adult male.— Wing, 337-368 (352); tail, 215-230 (221.6); culmen 

 (from cere), 27-30 (28.5). <= 



Adult female.— Wing, 385-390 (387.5); tail, 235-237 (236); cul- 

 men (from cere), 31-31.5 (31.3).'^ 



North-central Canada, from Hudson Bay to valley of the Mac- 

 kenzie River (Fort Resolution; Slave River, 75 miles below Fort 

 Smith) ; breeding southward to northern Manitoba and southwestern 

 Saskatchewan (Prince Albert; Moose Lake; Pas); south in winter to 

 Ontario (Toronto), Wisconsin (Racine), northeastern Illinois (Kane 

 County; Cook County), Minnesota (Aitken), North Dakota, (Devils 

 Lake), Montana, Idaho (Fort Sherman), and Colorado. 



[Strix] wapacuthu Gmelin, c Syst. Nat., i, pt. 1, 1788, 290 (woods about Hudson 

 Bay; based on Wapacuthu Owl Fenna.nt, Arctic Zool., i, 231).— Latham, Index 

 Orn., i, 1790, 58. 



"■ Two specimens. 



b Four specimens. 



c Five specimens. 



^ Two specimens. 



« Notwithstanding the circumstance that the original describer placed this bird in 

 the section ' ' without ears, " it is practically certain that the Wapacuthu Owl of Pennant 

 is not Nydea nyctea, as commonly suppo.scd, but is the Arctic Great Horned Owl. 

 Except in the one particular mentioned the description answers perfectly to the 

 latter. Molting specimens of Bubo are often destitute of obvious ear-tufts, and this 

 may have been the condition of Pennant's bird; or the ear-tufts may have been 

 plucked before the specimen came into his possession. 



