198 CHECK-LIST OF NORTH AMERICAN BIRDS. 



GENUS NYCTIDROMUS GOULD. 



Nyctidromus GOULD, Icones Avium, Pt. II, Aug., 1838, pi. xii. Type, by 

 monotypy, Nyctidromus derbyanus GOULD = Caprimulgus albicollis 

 G ME LIN. 



Nyctidromus albicollis (GMELIN). 



RANGE. Southern Texas south to Argentina. 



a. [Nyctidromus albicollis albicollis. Extralimital.] 



b. Nyctidromus albicollis m&rilli SENNETT. Merrill's Parauque. [419.] 



Nyctidromus albicollis merrilli SENNETT, Auk, V, Jan., 1888, 44. (Nueces 

 River, Nueces Co., Texas.) 



RANGE. Southern Texas (mainly Rio Grande Valley) south to northern 

 Vera Cruz ; in winter along the Gulf coast to the Isthmus of Tehuantepec. 



GENUS GHORDEILES SWAINSON. 



Chordeiles SWAINSON, Fauna Bor.-Am., II, 1831 (1832), 496. Type, by 

 monotypy, Caprimulgus virginianus GMELIN. 



Chordeiles virginianus (GMELIN). 



RANOE. 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.) 



RANGE. 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 hnryi CASSIN. Western Nighthawk. [420a.] 



Chordeiles henryi CASSIN, Illustr. Birds Calif., Texas, etc., 1855, 239. 

 (Fort Webster, New Mexico.) 



