223 NORTH AMERICAN BIRDS. 



bluish wbite, rarelj' faintly spotted witli pale brownisb. ITah. 'Wholo 

 of temperate Xorth America, ineludiiiL; i^reater part of Mexico. 



333. A. cooperi (Bonap.). Cooper's Hawk, 

 a'. Baroportionof tarsus in front sbortcr than middle toe; wing more than 12.00. 

 (Subgenus Astur LAc£ri;DE.) 

 6'. Adult : Above, including whole back, clear bluish gray, or plumbeous, with 

 blackish shaft-streaks ; top of head deep black, the feathers pure white 

 beneath surface ; tail bluish gray, crossed by about four dusky bands, 

 these sometimes nearly obsolete on upper surface; lower parts white, 

 the breast, belly, sides, and flanks thickly zigzagged or irregularly 

 barred with slaty grayish, the feathers, especially on breast, often with 

 dusky mesial streaks. Young : Above dusky grayish brown, more or less 

 spotted with pale buff or whitish, the feathers margined with buff, those 

 of head and neck edged or streaked with same; tail light gra)-ish brown, 

 narrowly tipped with white, and crossed by four distinct bands of duskj-, 

 with a fifth, less stronglj- marked, concealed by upper coverts ; lower 

 parts whitish, or pale buff, with distinct narrow stripes of blackish, these 

 more tear-shaped on belly, broader and more spot-like on sides and 

 flanks. Male: Length about 22.00, wing 12.00-13.25, tail 9.50-10.50, 

 tar.sus 2.70-3.05. Female: Length about 24.50, wing 13.50-14.25, tail 

 11.50-12.75, tarsus 2.70-3.05. ^Nest in trees. Eggs 2-5, 2.32 X l."9, 

 white, or glaucous-white, sometimes ver}' faintly marked with pale 

 brownish. Hah. Northern and eastern North America, breeding chicflj- 

 north of the United States, except in higher mountains ; west to and 

 including Rocky Mountains, where breeding as far south as Colorado. 



334. A. atricapillus (Wils.). American Goshawk. 

 6'. Adult: Above dark plumbeous, the back inclining to sooty blackish ; other- 

 wise like A. atricapillus, but markings on lower parts much heavier, and 

 darker in tint. Young : Above brownish black, this color predomi- 

 nating largely over the lighter markings; stripes on lower parts much 

 broader than in A. atricapilhts, and deep black, the thighs with largo, 

 often cordate, spots of the same, i'^ff/s 2.3Ij X L79. Hah. Taci fie coast, 

 north to Sitka, and breeding southward to at least 39' in Sierra Nevada. 

 3.'54a. A. atricapillus striatulus Eidgw. Western Goshawk. 



Genvs PARABUTEO Hidgwat. (Page 223, pi. LXVL, fig. 4.) 



Species. 

 Common Characters.— Wing 11.65-14.60, tail 9.00-11.00, culmen 0.82-1.10, 

 tarsus 2.78-3.75, middle toe 1.52-2.00. Adult: Prevailing color dark chocolate- 

 brown, or sootj-, sometimes uniform, sometimes varied by whitish or ochraceous 

 spotting; lesser wing-coverts, and tibia), deep rufous; tail-coverts white; tail black, 

 with white base and tip. Yoitng : Plumage greatly variegated. Above dusky 

 brown, the fo.athcrs edged with rusty, head and neck streaked with ochraceous; 

 lower parts jiale ochraceous, or bufly whitish, the breast and belly with longitudinal 



