656 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult male.— Length (skins), 325-373 (345); wing, 284-302 (292); 

 tail, 121.5-157.5 (147.6); culmen, from cere, 15-18 (16.6).« 



Adult female.— Length (skins), 320-382 (345); wing, 288-303 

 (293.9); tail, 143.5-160 (151); culmen, from cere, 16.5-18.5 (17.3).^ 



Temperate North America; north to Newfomidland, southern 

 Quebec (Point de Monts), northwestern Ontario (Elmsdale; Port 

 Sydney), southern Keewatin, southern Mackenzie, British Columbia, 

 and coast of southern Alaska (Taku River) ; breeding southward to 

 Virginia, Arkansas, northern Texas, southern California, etc. ; winters 

 over greater part of its range and southward to central Mexico 

 (Guanajuato; Valley of Mexico and Mexicalcingo, Mexico; Orizaba, 

 Puebla; Las Bocas, Durango). 



(?) [Strix] americana Gmelin, Syst. Nat., i, pt. 1, 1788, 288 (South America; 

 based on Ado americanus Brieson, Om. p. 145, no. 7, and Bubo ochro-cinereus 

 pectore maculoso Feuillee, Journ. des obs., ed. 1725, p. 59. — Latham, Index 

 Om., i, 1790, 54. 



Otus americanus Stephens, Shaw's Gen. Zool., xiii, pt. ii, 1825, 57. — Bonaparte, 

 Geog. and Comp. List, 1838, 7.— Jardine, Contr. Om., 1848, 81 (Bermudas).— 

 Ka.up, Jardine's Contr. Om., 1852, 113 (monogr.); Trans. Zool. Soc. Lond., 

 iv, 1859, 232 (monogr.).— Allen, Proc. Essex Inst., iv, 1864, 51. 



[Otus] americana Bonaparte, Consp. Av., i, 1850, 50. 



[Otu^] americanus Gray, Hand-list, i, 1869, 50, no. 540. — Sclater and Salvin, 

 Nom. Av. Neotr., 1873, 116. 



0[it«l americanus Maximilian, Journ. fiir Om., 1858, 25 (Missouri River). 



Otus vulgaris americanus Schlegel, Mus. Pays-Bae, ii, no. 11 (Oti), 1863, 2; no. 

 36 (Revue), 1873, 2. 



[Asia otus.] Subsp. a. Asio americanus Sharpe, Cat. Birds Brit. Mus., ii, 1875, 

 229 (Ft. Simpson, and Sumas, Brit. Columbia; w. Mexico ; Valley of Mexico). 



Asio americanus Mearns, Bull. Essex Inst., xii, 1879, 121 (Hudson Highlands, 

 New York).— RiDG WAY, Proc. U.S. Nat. Mus., iii, 1880, 191; Nom. N. Am. 

 Birds, 1881, no. 395. 



A[sio] americanus Ridgway, Bull. Ills. State Labr. N. H., no. 4, 1881, 187 (Illi- 

 nois). 



o Fourteen specimens. 



b Eleven specimens . 



Locality. 



MALES. 



Fiveadult males from eastern United States 292.6 150.9 16.1 



Eight adult males from western United States 292.2 144.4 16.9 



One adult male from Guanajuato, Mexico 287 156 17 



FEMALES. 



SLx adult females from eastern United states 293.8 150.5 17.2 



Fiveadult females from western United States 294.2 151 17.3 



Culmen, 

 from 

 cere. 



