22 CHECK-LIST OF NORTH AMERICAN BIRDS. 



SUBGENUS COLYMBUS. 

 Colymbus holboelli (REINHARDT). Holbcell's Grebe. [2.] 



Podiceps holbosllii REINHARDT, Videnskab. Meddelelser, 1853, 76. (Nen- 

 ortalik, Julianehaab district, Greenland.) 



RANGE. North America and eastern Asia. Breeds from north- 

 western Alaska, northern Mackenzie, and northern Ungava south to 

 northern Washington, northern Montana, and southwestern Minnesota ; 

 winters from southern British Columbia, southern Wisconsin, south- 

 ern Ontario, and Maine south to southern California, southern 

 Colorado, the Ohio Valley, and North Carolina; casual in Georgia 

 and Greenland. 



SUBGENUS BYTES KAUP. 



Dytes KAUP, Skizz. Entw.-Gesch. Eur. Thierw., 1829, 41. Type, by mono- 

 typy, Colymbus auritus LINNAEUS. 



Colymbus auritus LINNAEUS. Horned Grebe. [3.] 



Colymbus auritus LINNZEUS, Syst. Nat., ed. 10, I, 1758, 135. (Sweden.) 



RANGE. Northern part of Northern Hemisphere. Breeds from 

 the lower Yukon, northern Mackenzie, central Keewatin, southwestern 

 Ungava, and Magdalen Islands south to southern British Columbia, 

 northern Utah, northern Nebraska, central Minnesota, southern On- 

 tario, and northeastern Maine; winters from southern British Colum- 

 bia, southern Ontario, and Maine south to southern California, the 

 Gulf coast, and Florida; casual in Greenland. 



Colymbus nigricollis (BREHM). 



RANGE. Temperate Europe, Asia, and North America; in winter 

 south to South Africa and Central America. 



a. [Colymbus nigricollis nigricollis. Extralimital.] 



b. Colymbus nigricollis calif ornicus (HEERMANN). Eared Grebe. [4.] 



Podiceps californicus HEERMANN, Proc. Acad. Nat. Sci. Phila., 1854, 179. 

 (California.) 



