BIRDS OF NORTH AND MIDDLE AMERICA 163 



Astur atricapillus Poole, Queen Charlotte Islands, 1872, 308 (Burnaby Island). — 

 Sharpe, Cat. Birds Brit. Mus., i, 1874, 97, part. 



Astur atricapilbis subsp.? Patch, Can. Field Nat., xxxvi, 1922, 133 (Massett 

 Queen Charlotte Islands; spec; plura.). 



Astur atricapillus striatuhis Swarth, Univ. California Publ. ZooL, x, 1912, 28 

 (Vancouver Island). 



Accipiter atricapillus striaiulus Fannin, Check list British Columbia Birds, 

 1898, 34 (Vancouver Island). — Kermode, Cat. British Columbia Birds, 1904, 

 29 (Skidegate, Queen Charlotte Islands). — Osgood, North Amer. Fauna, No. 

 21, 1901, 42 (Massett, Queen Charlotte Islands).— Bent, U. S. Nat. Mus. 

 Bull. 167, 1937, 139, part. 



Accipiter atricapillus Fannin, Check list British Columbia Birds, 1898, 34 (Van- 

 couver Island). — Kermode, Cat. British Columbia Birds, 1904, 29 (Van- 

 couver Island; few spec). 



Astur atricapillus laingi Taverner, Condor, xlii, 1940, 160 (Masset [= Massett], 

 Queen Charlotte Islands, Brit. Columbia; descr. ; plum.; crit.). — Anonymous, 

 Auk, Ivii, 1940, 594, in text (Queen Charlotte Islands). 



As'.tur gentilis striaiulus Swann, Synop. Accip., 1921, 33, part (islands oflf north- 

 west Pacific coast); Monogr. Birds Prey, i, 1925, 189, part. 



Accipiter gentilis striaiulus Peters, Check-list Birds of World, i, 1931, 208. part 

 (islands off northwest Pacific cost). 



ACCIPITER BICOLOR BICOLOR (VieiHot) 



Btcolored Hawk 



Adult male. — Top of head sooty black, remainder of upperparts 

 slate color to dark neutral gray, slightly darker on the scapulars and 

 innermost secondaries, shading to slate gray on the neck and sides of 

 face. Wings above fuscous-black on the outer v/ebs, fuscous on the 

 distal parts of the inner webs, white on the basal parts of the inner 

 webs, indistinctly barred with fuscous-black; below, pale neutral 

 gray shading to white toward the bases of the quills and barred with 

 fuscous. Under wing coverts white, russet, or cinnamon-brown along 

 the carpal band; under tail coverts white, with some grayish, and 

 sometimes some russet or chestnut feathers; tibiae between russet 

 and chestnut; remainder of underparts light neutral gray to dark 

 gull gray. Tail fuscous-black to sooty black above, fuscous below, 

 crossed by three or four narrower bands, which are fuscous above 

 shading to white toward the bases of the inner webs, and pale neutral 

 gray to white below. Bill black, slate at base of mandible ; bare skin 

 around eye chrome yellow; cere, lores, and remaining bare skin on 

 sides of face greenish sulphur yellow; iris orange: feet yellowish olive- 

 yellow (Cherrie). 



Adult female. — Similar to the male, but larger. 



Immature male. — White-breasted variety: Top of head fuscous- 

 black to sooty black, the feathers of the occiput with concealed white 

 bases; a distinct white or buffy nuchal collar, continuous with the 

 white of the underparts; cheeks and auriculars white or cream-buff, 

 streaked with black; remainder of upperparts fuscous, each feather 



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