6 NORTH AMERICAN BIRDS. 
streak on side of throat, or elsewhere below level of eyes. Length 
12.00-14.00; wing 5.20-5.50. 
d', Three or four inner quills mostly or entirely white. Hab. Central 
Europe and Asia. 
C. nigricollis (BRzHM). Eared Grebe.! 
d@. Inner quills with inner webs wholly dusky. Colors generally 
duller and bill more slender. Eggs 4-8, 1.75 x 1.19. Hab. 
Western North America, north to. Great Slave Lake, south to 
Guatemala, east to Mississippi Valley. 
4. C.nigricollis californicus (Hrxzrm.). American Eared Grebe. 
a?, Wing less than 5.00 inches. (Subgenus Podiceps Lau.) 
Tarsus decidedly shorter than middle toe without claw. Nuptial plumage: 
Top of head dull greenish black; rest of head dark gray or dull plum- 
beous, the chin and throat dull black. Downy young: Top of head black, 
with a rufous spot in middle of crown, and various white markings; 
sides and underparts of head and neck white varied with black lines. 
Length 9.00-10.50; wing 4.00. Hggs 1.35 x .94. Hab. Tropical America 
in general, north to southern Texas and Lower California. 
5. C. dominicus Linn. St. Domingo Grebe. 
. Genus PODILYMBUS Lasson. (Page 4, pl. I, fig. 5.) 
Species. 
Brownish above, silvery white beneath, the feathers dark grayish basally. 
Nuptial plumage: Chin, throat, and anterior portion of malar region black; rest of 
head and neck brownish gray, darker above; lower parts spotted with dusky ; 
bill whitish, crossed about the middle by a black band. Winter plumage: Black 
throat, etc., of nuptial plumage replaced by dull whitish, the rest of the head 
browner; lower parts without dusky spots; bill brownish (paler on lower man- 
dible) without black band. Young: Similar to winter adult, but sides of head more 
or less distinctly striped with brown. Downy young: Head and neck distinctly 
striped with white and black, the crown with a rufous spot; a rufous spot on upper 
part of nape and on each side of occiput; upper parts blackish, marked with four 
strips of grayish white. Length 12.00-15.00; wing 4.50-5.00. Hggs 4-5, 1.72 x 
1.99. Hab. The whole of America, except extreme northern and southern districts. 
6. P. podiceps (Linn.). Pied-billed Grebe. 
Famity URINATORIDAZ.—TuE Loons. (Page 4.) 
Genus. 
(Characters same as those given for the family).......... Urinator. (Page 7.) 
1 Podicepe nigricollis Bream, Vég. Deutschl., 1831, 963. Colymbue nigricollie Sresn., Auk, ii., Oct. 1885, 340. 
