170 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



Adult male.— Wing 214-238 (231); tail 181-211 (198.8); culmen 

 from cere. 15-17.5 (16.2); tarsus 61.5-73 (64.1); middle toe without 

 claw 35-48 (40.5 mm.).^^ 



Adult Jemale.—Wmg 247-278 (259.9); tail 215-242 (220.9); 

 culmen from cere 17.5-21 (19); tarsus 66-75 (71.1); middle toe with- 

 out claw 42-49.5 (46.1 mm.).^^ 



Range. — Breeds in temperate North America from southern 

 British Columbia, central Alberta, and southern Manitoba east 

 across southern Canada to northern New Brunswick, Nova Scotia, 

 and Prince Edward Island, and south throughout the United States 

 to central Florida (Orlando and Manatee), Mississippi, Alabama, 

 Louisiana, Texas, and Chihuahua, Sonora, and Baja California. 



Winters from southwestern British Columbia, Wasliington, Colo- 

 rado, Nebraska, southern Minnesota, southern Illinois, Indiana, 

 Ohio, southern Michigan and Ontario, New York, Massachusetts, 

 and southern Maine, southward throughout the United States and 

 Mexico (Sonora, Chihuahua, Sinaloa, Jalisco, Guerrero, Veracruz, 

 and Chiapas) to Guatemala (Coban and Duenas) and to Costa Rica 

 (ElMojon). 



Occasional in summer to Alaska (Sitka), Athabaska (La Biche 

 River), Keewatin (Hayes River), and Labrador (Natashquam) . 



Type locality. — Near Bordentown, N. J. 



Faico hyemalis j5 Gmelin, Syst. Nat., i, pt. 1, 1788, 274 ("provincia Noveboracensi"; 

 based on Northern Falcon Latham, Gen. S\'nopsis Birds, i, 1781, 79). 



Falco cooperii Bonaparte, Amer. Orn., ii, 1828, 1, pi. 10, fig. 1 (near Bordento^vn, 

 N. J.); Ann. Lye. Nat. Hist. New York, ii, 1828, 433.— Nuttall, Man. Orn. 

 United States and Canada, Land Birds, 1832, 99. — Audubon, Orn. Biogr., 

 V, 1839, 376. — Jardine, ed. Wilson's Amer. Orn., iii, 1840, 363. — van Rossem, 

 Auk, liv, 1937, 203, in text (type spec, in Paris, meas.). 



Asiur cooperi Bonaparte, Geogr. and Comp. List., 1838, 5; Consp. Gen. Av., i,' 

 1850, 31.— Audubon, Synopsis, 1839, 18; Birds Amer., 8vo ed., i, 1840, 98, 

 pi. 24. — Newberry, Rep. Pacific R. R. Surv., vi, pt. 4, chapt. 2, 1857, 74 (San 

 Francisco and Benieia, Calif, to Columbia River). — Maximilian, Journ. 

 fur Orn., 1858, 13. 



Astur cooperi Nuttall, Man. Orn. United States and Canada, Land Birds, 

 ed. 2, 1840, 89.— Jardine, ed. Wilson's Amer. Orn., iii, 1840, 363.— Giraud, 

 Birds Long Island, 1844, 20 (Long Island, N. Y., not in winter, not known 

 to breed). 



Accipiier cooperi Dekay, Zool. New York, ii, 1844, 18, pi. 4, fig. 5 (fig.; distr.; 

 New York). — Barry, Proc. Boston Soc. Nat. Hist., 1854, 2 (Wisconsin: not 

 numerous). — Baird, Rep. U. S. and Mex. Bound. Surv., ii, pt. 2, 1859, 3 

 (Colorado River, Calif.). — Sclater, Proc. Zool. Soc. London, 1859, 389 

 (Totontepec and Oaxaca City, Oaxaca; crit.); Proc. Zool. Soc. London, 1866, 

 304 (monogr.). — Cooper and Suckley, Rep. Pacific R. R. Surv., xii, book 2, 

 pt. 3, 1860, 145 (Puget Sound; Fort Dalles). — Salvin and Sclater, Ibis, 



•^ Thirty-four specimens from all parts of its range. 

 " Twenty-seven specimens from all parts of its range. 



