166 CHECK-LIST OF NORTH AMERICAN BIRDS. 



Range. — California except the Colorado Desert and the extreme northern 

 coast district north to central southern Oregon; also in northwestern Lower 

 California. 



Bubo virginianus pallescens Stone. Western Horned Owl. [375a.] 



Bubo virginiamis pallescens Stone, Amer. Nat., XXXI, No. 363, March 1, 

 1897, 237. (Watson Ranch, 18 miles southwest of San Antonio, Texas.) 



Range. — Central Texas to Arizona, southeastern California, and north- 

 eastern Lower California, south into Mexico (Sonora to Durango and Nuevo 

 Leon) . 



Bubo virginianus elachistus Brewster. Dwarf Horned Owl. [375e.] 



Bubo virginiamis elachistus Brewster, Bull. Mus. Comp. Zool., XLI, 

 No. 1, Sept., 1902, 96. (Sierra de la Laguna, Lower California.) 



Range. — Cape district of Lower California north to San Francisco ' Bay, 

 California. 



[Additional races of B. virginianus occur in Mexico and in Central and South 

 America.] 



Genus NYCTEA Stephens. 



Nyctea Stephens, in Shaw, General Zoology, XIII, Pt. ii, Feb. 18, 1826, 

 62. Type, by tautonymy, Strix erminea Shaw = Strix nyctea Lin- 

 naeus. 



Nyctea nyctea (Linnaeus). Snowy Owl. [376.] 



Strix Nyctea Linnaeus, Syst. Nat., ed. 10, I, 1758, 93. Based on The 

 Great White Owl Edwards, Nat. Hist. Birds, 61. (in Europa et 

 America septentrionali = Sweden.) 



Range. — Breeds on the barren grounds from the islands of Bering Sea, the 

 Yukon Delta, Melville Island, and northern Greenland south to central 

 Mackenzie, central Keewatin, and northern Ungava; also in Jan Mayen, 

 Spitzbergen, Franz Josef Land, Novaya Zemlya, on the Kola River, northern 

 Russia, and the Siberian tundra. Winters from the Arctic coast south to the 

 southern Canadian provinces and Montana, with periodic and irregular migra- 

 tions to the Middle States and the Ohio Valley, straggling to California, Texas, 

 Louisiana, Georgia, South Carolina, and Bermuda; also to Iceland, the Shet- 

 lands, Orkneys, Hebrides, Scotland, Germany, and Russia. 



Genus SURNIA Dum^ril. 



Surnia Dumeril, Zool. Analytique, 1806, 34. Type, by subs, desig., 

 Strix funerea Gmelin = Strix ulula, LinnaeXTS (Gray, 1840). 



