38 CHECK-LIST OF NORTH AMERICAN BIRDS. 



RANGE. North Pacific, Bering Sea, and adjacent Arctic Ocean, 

 chiefly on Asiatic side. Breeds in Kamchatka and on Commander 

 Islands; occurs casually at Herald Island, Port Clarence, Franklin 

 Bay, and Aleutian Islands; winters to southern Japan. 



Larus occidentalis AUDUBON. Western Gull. [49.] 



Larus occidentalis AUDUBON, Orn. Biog., V, 1839, 320. (Cape Disap- 

 pointment, Washington.) 



RANGE. Pacific coast of North America. Breeds from Washing- 

 ton to southern Lower California; winters from Washington to south- 

 western Mexico; casual in southern British Columbia; accidental in 

 Colorado. 



[Larus affinis REINHARDT. Siberian Gull. [50.] 



Larus affinis REINHARDT, Videnskab. Meddelelser, 1853, 78. (Nenortalik, 

 Julianehaab district, Greenland.) 



RANGE. Northern Asia and Europe, south in winter to northern 

 Africa; accidental in Greenland.] 



Larus argent tus PONTOPPIDAN. Herring Gull. [51.] 



Larus argentatus PONTOPPIDAN, Danske Atlas, I, 1763, 622. (Denmark.) 



RANGE. Northern Hemisphere. In America breeds from south 

 central Alaska, Melville Island, southern Ellesmere Land, and 

 Cumberland Sound south to southern British Columbia, southern 

 Alberta, northern North Dakota, central Wisconsin, southern Ontario, 

 northern New York, and Maine, and in Europe south to northern 

 France and east to White Sea; winters from southern British Colum- 

 bia south to Lower California and western Mexico, and from Gulf of 

 St. Lawrence and the Great Lakes south to the Bahamas, Cuba, 

 Yucatan, and coast of Texas, and in Europe to Mediterranean and 

 Caspian seas. 



[Larus vegae PALMEN. Vega Gull. [52.] 



Larus argentatus var. vegoe PALMEN, in NORDENSKIOLD, Vega-Exped. 

 Vetensk. lakttag., V, 1887, 370. (Pidlin and vicinity, extreme north- 

 eastern Siberia.) 



RANGE. Bering Sea and adjacent Arctic Ocean. Breeds on north- 

 ern coast of Siberia; south in winter to Japan.] 



