170 CHECK-LIST OF NORTH AMERICAN BIRDS. 



Genus NYCTIDROMUS Gould. 



Nyctidroinus Gould, Icones Avium, II. 1838, pi. ii. Type, 

 N. derbyanus Gould = Caprhnulgus albicollis Gmel. 



419. Nyctidromus albicollis merrilli Senn. 



Merrill's Parauque. 



Nyctidromus albicollis merrilli Senn. Auk, V. Jan. 1888, 44. 



[B— C— , R356, C395.] 



Geog. Dist. — Valley of the Lower Rio Grande, north to the 

 Nueces River, south into northeastern Mexico. 



Genus CHORDEILES Swainson. 



Chordeiles Swains, in Sw. & Rich. Fauna Bor. Am. II. 183 1, 

 496. Type, Caprimulgus virginianiis Gmel. 



420. Chordeiles virginianus (Gmel.). 



Nighthawk. 



Caprimulgus virginianus Gmel. S. N. I. ii. 1788, 1028. 

 Chordeiles virginianus Swains, in Sw. & Rich. Fauna Bor. Am. 

 II. 1831, 496. 



[B 114, C 267, R357, C 399.] 



Geog. 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 henryi Cass. lUustr. B. Cal. Tex. etc. I. 1855, 233. 

 Chordeiles virginianus var. henryi Coues, Key, 1872, 181. 



[B 115, C 267^, R 357^, C 400.] 



Geog. Dist. — Western United States, from the Great Plains to 

 the Pacific coast, and from British Columbia south to northern 

 South America. 



