198 CHECK-LIST OF NORTH AMERICAN BIRDS. 
GeEeNus NYCTIDROMUS Gou.p. 
Nyctidromus Goutp, Icones Avium, Pt. II, Aug., 1838, pl. xii. Type, by 
monotypy, Nyctidromus derbyanus GouLD = Caprimulgus albicollis 
GMELIN. 
Nyctidromus albicdllis (GMELIN). 
RanGE.— Southern Texas south to Argentina. 
a. [Nyctidromus albicollis albicollis. Extralimital.] 
b. Nyctidromus albicollis mérrilli Sennetrr. Merrill’s Parauque. [419.] 
Nyctidromus albicollis merrilli SenNert, Auk, V, Jan., 1888, 44. (Nueces 
River, Nueces Co., Texas.) 
Rance.— Southern Texas (mainly Rio Grande Valley) south to northern 
Vera Cruz; in winter along the Gulf coast to the Isthmus of Tehuantepec. 
GENUS CHORDEILES Swarnson. 
Chordeiles Swatnson, Fauna Bor.-Am., II, 1831 (1832), 496. Type, by 
monotypy, Caprimulgus virginianus GMELIN. 
Chordeiles virginidnus (GMELIN). 
Rance.— North America, south in migration through the West 
Indies and Central America to Argentina. 
a. Chordeiles virginianus virginianus (GMELIN). Nighthawk. [420.] 
Caprimulgus virginianus GMELIN, Syst. Nat., I, ii, 1789, 1028. ( Virginia.) 
Rance.— North and South America. Breeds from southern Yukon, central 
Mackenzie, central Keewatin, northern Quebec, and Newfoundland south to 
northern parts of Gulf States and west to edge of Plains from Minnesota to 
northeastern Texas; migrates through the Greater Antilles and Central Amer- 
ica; winters in South America from Brazil to Argentina. 
b. Chordeiles virginianus hénryi Cassin. Western Nighthawk. [420a.] 
Chordetles henryi Cassin, Illustr. Birds Calif., Texas, ete., 1855, 239. 
(Fort Webster, New Mexico.) 
