570 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



C[hordeiles] v[irginianus] sennetti Bailey (Florence M.), Handb. Birds W. U. S., 

 1902, 228. 



[Chordeiles] sennetti Sharpe, Hand-list, ii, 1900, 79. 



Chordeiles henryi (not of Cassin) Blakiston, Ibis, 1863, 55 (Ft. Carlton and Ft. 

 Pitt, Saskatchewan; habits; descr. eggs). 



Chordeiles popetue v&T. henryi Allen, Proc. Bost. Soc. N. H., xvii, 1874, 62 (North 

 Dakota; e. Montana). 



Chordeiles popetue henryi Eidgway, Proc. U. S. Nat. Mus., iii, 1880, 188, part; 

 Nom. N. Am. Birds, 1881, no. 357, part. — Hoffman, Proc. Bost. Soc. N. H., 

 xxi, 1882, 401 (Ft. Berthold, North Dakota). 



Chordeiles virginianus henryi Grinnell (G. B.), Ludlow's Rep. Recon., 1876, 80 

 (plains of e. Montana). — Stejneger, Auk, ii, 1885, 182, part. — American 

 Ornithologists' Union, Check List, 1886 (and 2d ed., 1895), n >. 420a, 

 part. — Seton, Auk, iii, 1886, 156 (w. Manitoba, summer resident).— Cant- 

 well, Orn. and Ool., xv, 1890, 133 (w. Minnesota, to exclusion of C v. vir- 

 ginianus). — Nutting, Bull. Labr. N. H. Univ. Iowa, 1893, 271 (Grand 

 Rapids, lower Saskatchewan R.). — Thorne, Auk, xii, 1895, 215 (Ft. Keogli, 

 e. Montana, breeding). — Anderson, Proc. Davenport Ac. Sci., xi, 1907, 281 

 (Dickinson and Johnson counties, Iowa). — Visher, Auk, xxvi, 1909, 148 

 (w. South Dakota). — Stansill, Auk, xxvi, 1909, 395 (centr. Alberta, breed- 

 ing). — Ferry, Auk, xxvii, 1910, 199 (Quill Lake and Prince Albert, Sas- 

 katchewan). 



C[hordeiles] virginianus henryi Ridgway, Man. N. Am. Birds, 1887, 301, part. 



C[hordeiles] v[irginianu^] henryi Bailey (Florence M.), Handb. Birds W. U. S,, 

 1902, 267, part. 



Ch[ordeiles] virginianus henryi Hartert, Tierreich, Podarg., Caprim., Macropt., 

 1897, 19, part. 



[Chordeiles] henryi Sharpe, Hand-list, ii, 1900, 79, part. 



Chordediles popetue henryi Coues, Check List, 2d ed., 1882, no. 400, part. 



C[hordediles] p[opetue] henryi Coues, Key N. Am. Birds, 2d ed., 1884, 454, part. 



CHORDEILES VIRGINIANUS HOWELLI Oberholser. 



HOWELL'S NIGHTHAWK. 



Resembling C. v. sennetti but adult male with general aspect of 

 upper parts more oclu'aceous, the darker markings more brownish 

 dusky and the paler ones more buffy or ochraceous; posterior under 

 parts more buffy, the darker markings of anterior portions more 

 brownish. 



Adult male. — Length (before skinning), 235 ;'^ wing, 192.5-211 

 (200); tail, 105-121 (112.3); exposed culmen, 5.9-7 (6.3); tarsus, 

 13-15.3 (14.3); middle toe, 14.2-15.5 (14.9).^ 



Adult female. —Length (before skmning), 228.6-254 (239.3);'= w4ng, 

 185-203.5 (193.4); tail, 104-122.5 (112.8); exposed culmen, 6.5-7.2 

 (6.9); tarsus, 13-14.8 (14.2); middle toe, 14.6-16 (15.3).* 



More southern portion of Great Plains and central Rocky Mountain 

 districts of United States, in Wyoming (Fort Bridger; Laramie River; 

 Laramie Peak; Greybull; La Bonte River; Riverside; Bridger Pass; 

 Germania; Bitter Creek; Pacific Springs; Black Hills; etc.), south- 



a One specimen. b Ten specimens. c Three specimens. 



