22 CHECK-LIST OF NORTH AMERICAN BIRDS. 
Suscenus COLYMBUS. © 
Colymbus hélbelli (REINHARDT). Holbell’s Grebe. [2.] 
Podiceps holbellit Retinnarvr, Videnskab. Meddelelser, 1853, 76. (Nen- 
ortalik, Julianehaab district, Greenland.) 
RancEe.— 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. 
SuspGcenus DYTES Kavup. 
Dytes Kaur, Skizz. Entw.-Gesch. Eur. Thierw., 1829, 41. Type, by mono- 
typy, Colymbus auritus LInNxvs. 
Colymbus auritus LINN&us. Horned Grebe. [3.] 
Colymbus auritus Linnaus, Syst. Nat., ed. 10, I, 1758, 135. (Sweden.) 
Rance.— 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 nigricéllis (BREHM). 
RancE.— Temperate Europe, Asia, and North America; in winter 
south to South Africa and Central America. 
a. [Colymbus nigricollis nigricollis. Extralimital.] 
b. Colymbus nigricollis californicus (HmeRMANN). Eared Grebe. [4.] 
Podiceps californicus HEERMANN, Proc. Acad. Nat. Sci. Phila., 1854, 179. 
(California.) 
