176 CHECK-LIST OF NORTH AMERICAN BIRDS. 
g. Bubo virginianus heterocnémis (OBERHOLSER). Labrador Horned Owl. 
(875f.] 
Asio magellanicus heterocnemis OBERHOLSER, Proc. U. S. Nat. Mus., 
XXVII, 1904, 187. (Lance au Loup [ = Wolf Bay], Labrador.) 
Ranee.— Northern Ungava and Labrador. 
h. Bubo virginianus algistus (OpERHOLSER). Saint Michael Horned Owl. 
[3759.] 
Asio magellanicus algistus OBERHOLSER, Proc. U.S. Nat. Mus., XX VII, 
1904, 190. (St. Michael, Alaska.) 
RancGe.— Coast region of northern Alaska from Bristol Bay and the Yukon 
delta northward. 
GENUS NYCTEA STEPHENS. 
Nyctea StePHENS, General Zoology, XIII, ii, 1826, 62. Type, by tau- 
tonymy, Strix erminea SHaw = Strix nyctea LINNXUS. 
Nyctea nyctea (LINN&US). Snowy Owl. [376.] 
Strix nyctea Linnzavus, Syst. Nat., ed. 10, I, 1758, 93. (Sweden.) 
RancE.— Northern parts of Northern Hemisphere. In North 
America breeds on barren grounds from the islands of Bering Sea and 
the Yukon delta to Melville Island and northern Greenland south to 
central Mackenzie, central Keewatin, and northern Ungava; winters 
from the Arctic coast south to the southern Canadian Provinces and 
Montana, and irregularly to the Middle States and Ohio Valley, strag- 
gling to California, Texas, Louisiana, North Carolina, and Bermuda. 
GENUS SURNIA DuMEeRIL. 
Surnia Dumeérit, Zool. Analytique, 1806, 34. Type, by subs. desig., 
Strix funerea auct.= Strix ulula Linnaus (Gray, 1841). 
Sarnia tlula (LINN avs). 
Rance.— Northern part of Northern Hemisphere. 
a. [Surnia ulula ulula (Linna/vus). European Hawk Owl. [377.] 
Strix ulula Linnxvus, Syst. Nat., ed. 10, I, 1758, 93. (Sweden.) 
RanceE.— Northern parts of Old World; casual in Alaska (St. Michael).] 
