170 CHECK-LIST OF NORTH AMERICAN BIRDS. 
Genus NYCTIDROMUS GouwLp. 
Nyctidromus GouLp, Icones Avium, II. 1838, pl. ii. Type, 
LV. derbyanus GOULD = Caprimulgus albicollis GMEL. 
419. Nyctidromus albicollis merrilli SEenn. 
Merrill’s Parauque. 
Nyctidromus albicollis merrilli SENN. Auk, V. Jan. 1888, 44. 
Geoc. Dist.— Valley of the Lower Rio Grande, north to the 
Nueces River, south into northeastern Mexico. 
Genus CHORDEILES Swainson. 
Chordeiles Swatns. in Sw. & RicuH. Fauna Bor. Am. II. 1831, 
496. Type, Caprimulgus virginianus GMEL. 
420. Chordeiles virginianus (GMEL.). 
Nighthawk. 
Caprimulgus virginianus GMEL. S, N. I. i. 1788, 1028. 
Chordeiles virginianus Swatns. in Sw. & Ricu. Fauna Bor. Am. 
II. 1831, 496. 
[B 114, C 267, R 357, C 399.] 
Geroc. Dist.— Northern and eastern North America, west to the 
Great Plains and central British Columbia, and from Labrador 
south through tropical America to the Argentine Republic. 
420 a. Chordeiles virginianus henryi (Cass.). 
Western Nighthawk. 
Chordeiles henryt Cass. Illustr. B. Cal. Tex. etc. I. 1855, 233. 
Chordeiles virginianus var. henryi COUES, Key, 1872, 181. 
[Bris, © 2670, R sire, Ciaoe,| 
Geroc. Dist.— Western United States, from the Great Plains to 
the Pacific coast, and from British Columbia south to northern 
South America. 
