n8 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. XIII. 



Nyctibius bracteatus Gould. COLOMBIAN POTOO. 



Nyctibius bracteatus GOULD, Proc. Zool. Soc. Lond., 1846, p. i (Bogota, Colom. 

 bia); SCLATER and SALVIN, Exotic Orn., 1867, pi. 20; HARTERT, Cat. Bds 

 Brit. Mus., XVI, 1892, p. 623; RIDGWAY, Bull. U. S. Nat. Mus., No. 50, VI, 

 1914, p. 587, in key. 



Range: Colombia to Guiana, Ecuador and Peru. 



Family CAPRIMULGID^E. 



The Goatsuckers, Whipporwills, Nighthawks, etc. 



Genus CHORDEILES Swainson. 



Chordeiles Swainson, Fauna Bor.-Am., II, 1831, p. 496 (Type Caprimulgus vir- 

 ginianus GMELIN). 



*Chordeiles virginianus virginianus (GmeL). NIGHTHAWK. 



Caprimulgus virginianus GMELIN., Syst. Nat., I, pt. 2, 1789, p. 1028 (Virginia). 

 Caprimulgus popetue VIEILLOT, Ois. Am. Sept., I, 1807, p. 56, pi. 24 (Nova 



Scotia). 



Chordeiles popetue BAIRD, Cat. N. Am. Bds., 1859, No. 114, part. 

 Chordeiles virginianus virginianus OBERHOLSER, Bull. U. S. Nat. Mus., No.86 



1914, p. 35; RIDGWAY, Bull. U. S. Nat. Mus., No. 50, VI, 1914, p. 562. 



Range: Eastern and northern North America, south in winter 

 through Gulf states, Greater Antilles, eastern Mexico and Central 

 America, to South America, generally south to southern Brazil, Para- 

 guay and northern Argentina. 



fair Massachusetts 3; Maine i; Connecticut 3; Wisconsin u; 

 Illinois 2; and Colombia, S. A., i. 



Chordeiles virginianus hesperis Grinnell. PACIFIC NIGHTHAWK. 



Chordeiles virginianus hesperis GRINNELL, Condor, VII, Nov. 1905, 1870 (Bear 

 Lake, San Bernardino Mts., California); RIDGWAY, Bull. U. S. Nat. Mus., 

 No. 50, VI, 1914, p. 567; OBERHOLSER, Bull. U. S. Nat. Mus., No. 86, 1914, p. 46. 



Range: Western United States from Nevada and Utah, northward 

 to Rocky Mountains and southeastern British Colombia and southern 

 Alberta; in winter south through New Mexico, Texas, Mexico, etc., to 

 Nicaragua. 



*Chordeiles virginianus sennetti (Coues). SENNETT'S NIGHTHAWK. 



[Chordeiles popetue] sennetti COUES, Auk, 1888, p. 37 (50 miles west of Pembina, 



North Dakota). 

 Chordeiles virginianus sennetti RIDGWAY, Bull. U. S. Nat. Mus., No. 50, VI, 1914, 



p. 568; OBERHOLSER, Bull. U. S. Nat. Mus., No. 86, 1914, p. 52. 



