BIRDS OP NORTH AND MIDDLE AMERICA. 569 



parts also lighter, the markings on anterior portion more grayish, the 

 bars on posterior portions narrower, sometimes interrupted. 



Adult male. — Length (before skinning), 213-248 (232) ;« wing 

 186-213 (198.3); tail, 101.5-112.5 (109.1); exposed cuhnen, 6-7.2 

 (6.9); tarsus, 13.5-15.8 (14.6); middle toe, 13.9-16 (15.3).'' 



Adult female.— Wmg, 175-201 (189.5); tail, 102.5-115 (108); 

 exposed culmen, 6-7.5 (6.5); tarsus, 13.8-15.3 (14.7); middle toe, 

 14-16 (14.9.)^ 



Northern portion of Great Plains district, breeding from Nebraska 

 (Thomas County; Antelope County) and northwestern Iowa (Sioux 

 City; Dickinson County) northward through South Dakota (Huron; 

 near Rosebud; Missouri River 40 miles above Fort Pierre; Fort 

 Sisseton), North Dakota (Fort Union; Pembina; 50 miles west of 

 Pembma Mountains ; Fort Rice; Linton; Big Muddy Creek; Towner 

 County; Devils Lake Lidian Reservation; Pierce County; Rolette 

 County; Nelson County; Souris River; Fort Berthold; etc.), west- 

 ern Minnesota (Lac qui Parle County; Grant County; Kimbrae), 

 northeastern Wyoming (Uva), eastern Montana (Fort Keogh; Dar- 

 nall's Ranch, Dawson County; Strater, Valley County), Assiniboia, 

 and western Manitoba to southeastern Saskatchewan (Fort Carleton; 

 Fort Pitt; Grand Rapids; Quill Iiake; Prince Albert); casual in 

 central Iowa (Dickinson County, June; 4 miles southeast of Boone, 

 Oct. 27); migrating southward tlirough Kansas (Burlington, October; 

 near Lawrence, September), and eastern Colorado (Barr, Aug. 8), 

 but not traced beyond, 



Chordeiles popetue (not Caprimulgus popetiLe Vieillot) Baird, Rep. Pacific R. R. 

 Surv., ix, 1858, 151, part (40 miles above Fort Pierre, South Dakota; Black 

 Hills?). 



Chordiles virginianus Coues, Bull. U. S. Geol. and Geog. Surv. Terr., iv, 1878, 

 613 (localities in North Dakota and eastern Montana; habits). — McChesney, 

 Bull. U. S. Geol. and Geog. Surv. Terr., v, 1879, 81 (Ft. Sisseton, South 

 Dakota). 



[Chordiles popetue] sennetti Coues, Auk, v, Jan., 1888, 37 (50 miles west of Pem- 

 bina, North Dakota; coll. U. S. Nat. Mus.). 



Chordeiles virginianus sennetti Chamberlain, Syst. Index Canad. Birds, 1888, 

 App. A., p. 14. — Chapman, Auk, v, 1889, 396. — American Ornithologists' 

 Union Committee, Suppl. to Check List, 1889, 18; Auk, xiv, 1897, 121 

 (Check List no. 420c); Check List, 3rd ed., 1910, 199.— Thompson, Proc. 

 U. S. Nat. Mus., xiii, 1890, 554 (Manitoba; habits).— Bishop, Auk, xiii, 

 1896, 135 (Towner and Rolette counties. North Dakota; crit.).— Lano, Auk, 

 XV, 1898, 54 (Madison, Lac qui Parle Co., w. Minnesota, 2 specs., Aug.).— 

 Bartsch, Auk, xvi, 1899, 86 (Boone Co., Iowa, 2 specs.; no date given).— 

 CoBEAUX, Ottawa Nat., 1900, 28 (s. Saskatchewan, summer resident).— 

 Anderson, Proc. Davenp. Ac. Sci., xi, 1907, 281 (Boone, Iowa, 1 spec.).— 

 Bent, Auk, xxv, 1908, 27 (s. w. Saskatchewan).— Wetmore, Condor, xi, 

 1909, 159 (near Lawrence, Kansas, Sept.). 



a Four specimens. ^ Ten specimens. 



