2, FALCONIDZ, DIURNAL BIRDS OF PREY.—GEN. 156, 157. 
underneath ; height of bill at base greater than chord of culmen; 4th quill longest, 
2d shorter than 6th, 1st very short. The two following species are exactly alike in 
color; one is a miniature of the other. The ordinary plumage is dark brown above 
(deepest on the head, the occipital feathers showing white when disturbed) with an 
ashy or plumbeous shade which increases with age, till the general cast is quite 
bluish-ash ; below, white or whitish, variously streaked with dark brown and rusty, 
finally changing to brownish-red (palest behind and slightly ashy across the breast) 
with the white then only showing in narrow cross-bars; chin, throat and crissum 
mostly white with blackish pencilling ; wings and tail barred with ashy and brown 
or blackish, the quills white-barred basally, the tail whitish-tipped; bill dark; 
claws black; cere and feet yellow. 
Sharp-shinned Hawk. “ Pigeon Hawk.” Feet extremely slender; bare 
portion of tarsus longer than middle toe; scutella frequently fused; tail 
square. g 10-12; wing 
6-7; tail5-6. 9 12-14; 
wing 7-8; tail 6-7. 
Whole foot 34 or less. 
North America, abund- 
ZF AN ant. Falco velox WILs., 
: Zi \\ v, 116, pl. 45, f. 1; F. 
Z, Wy RN wh) \ pennsylvanicus W1LS., Vi, 
“13, pl. 46, f.1; Sw. and 
Riow., F. B.-A. ii, 74; 
EF Norr:, 1, 87s Aupaeas 
BIG AAO COCuETS BBN, 100, pl. 25 ; Cass. in Bp., 
Si MCOOPs, 2400.5. 2 bene co eta : <| \. | RUBSCUSE 
Cooper’s Hawk. Chicken Hawk. Pest moderately tnt: bare portion 
of tarsus shorter than middle toe; scutella remaining distinct; tail a little 
rounded. ¢ 16-18; wing 9-10; tail 7-8; 9 18-20; wing 10-11; tail 
8-9. Whole foot 4 or more. N. Am., especially U. S.; common. Bonav., 
Am. ‘Orn. i, 1, pl. 1, £15 Aup., 1,98, pl: 245 ‘Cass* in Bp:, 165 Coors 
464. Falco cooperi and F’. stanleiti Nurr., i, 90,91. A. mexicanus Cass. 
in’ Bps,-L7i-Coor. 465, is the’ same bird. . =. "2 2"). = +s nGOORPRDE 
157. Genus ASTUR Lacepede. 
Goshawk. Adult dark bluish-slate blackening on the head, with a white 
superciliary stripe; tail with four broad dark bars; below, closely barred 
with white and pale slate, and sharply streaked with blackish. Young dark 
brown above, the feathers with pale edges, streaked with tawny-brown on 
the head and cervix; below fulvous-white with oblong brown markings. 
@ 2 feet long; wing 14 inches; tail 11; g smaller. A large, powerful, 
and, in perfect plumage, a very handsome hawk, inhabiting northern North 
America; the northern half of the United States chiefly in winter, but also 
breeding in mountainous parts. Wus., vi, 80, pl. 52, f. 3; Nurr., i, 85; 
Aup., i, 95, pl. 23; Cass. in Bp., 15; Coop., 467. A variety of the 
European Astur palumbarius? . . . . . . . . . ATRICAPILLUS. 
7 
