BIBDS OF NORTH AND MIDDLE AMERICA. 



275 



Mar. to May; Mount Vernon, New York, breeding) .—Schick, Auk, vii, 1890, 

 329 (Seven-mile Beach, New Jersey, breeding).— Coey, Cat. W. I. Birds, 

 1892, 124 (Cuba?; very doubtful).— Bendike, Life Hist. N. Am. Birds, pt. 

 2, 1895, 415, pi. 4, figs. 16, 17 (eggs).— Nehkling, Our Native Birds, etc., 

 1896, 311.— MoREis, Auk, xiv, 1897, 100 (Springfield, Massachusetts, 1 spec, 

 June 9).— Hill, Auk, xix, 1902, 93 (New London, Connecticut, and near 

 Rhode Island border, breeding). 



Clormsl ossifragus Geay, Gen. Birds, ii, 1846, 315.— Bonaparte, Consp. Av., i, 

 1850, 385.— EiDGWAY, Man. N. Am. Birds, 1887, 363. 



[Corous] ossifragus Gray, Hand-list, ii, 1870, 13, no. 6213.— Coues, Key N. Am. 

 Birds, 1872, 163.— (?) Sclatbr and Salvin, Nom. Av. Neotr., 1873, 40 

 (Cuba).— Cory, I>ist Birds W. I., 1885, 14 (Cuba?). 



Corone ossifraga Boucaed, Catalog. Avium, 1876, 282, no. 8853. 



Colcms ossifragus Sharpe, Cat. Birds Brit. Mus., iii, 1877, 29. 



CorOTsmari<iOT«s"Bartr[am]" Coues, Check List, 2d ed., 1882, no. 343 (ex Corims 

 maritimus, the great sea-side crow or rook, Bartram, Travels). 



Clorvus} maritimus Coues, Key N. Am. Birds, 2d ed., 1884, 417. 



CORVUS MEXICANUS Gmelin. 

 BTEXICAN CROW. 



Somewhat like C. ossifragus, but decidedly smaller and plumage 

 much more lustrous. 



Adults {sexes alike). — Pileum, hindneck, wing-coverts, and second- 

 aries lustrous dark violet; sides of neck, back, scapulars, rump, upper 

 tail-coverts, and primary coverts, lustrous dark violet-blue; alula, 

 primaries, and tail' dark steel blue, the middle rectrices tinged with 

 violet and the outermost primaries more greenish blue; sides of head 

 and under parts lustrous dark steel blue or greenish steel blue, becom- 

 ing more decidedly greenish posteriorly, the anterior portions some- 

 times inclining to violet; bill, legs, and feet black; iris brown. 



Adult maZe.— Length (skins), 362-388.5 (370.6); wing, 246.5-259 

 (250.5); tail, 146.5-158 (155.5); exposed cuimen, 40-42 (41); depth of 

 bill at nostrils, 13-14.5 (14); tarsus, 38.5-42.5 (41); middle toe, 

 28-31.5 (30). « 



Adult female.— Length (skins), 338-355.5 (344); wing, 231-241.5 

 (236); tail, 143.5-158.5 (148); exposed cuimen, 37.5-40.5 (38.5); depth 

 of bill at nostrils, 12.5-13 (13); tarsus, 38-41 (39); middle toe, 

 ,27.5-29 (28).* 



« Eight specimens. 

 6 Six specimens. 



There seems to be no difference between specimens from opposite sides of Mexico; 

 following are their average measurements: 



