FALCONS, HAWKS, EAGLES, ETC. 195 



a^. Tail rufous, with sometimes a black band near the end. 



337. Keu-tailed Hawk (Ad.) and Eaces. 

 a^. Tail black or blackish, with four to six white or grayish cross- 

 bars . 339. Eed-shouldered Hawk (Ad.). 



339«. Florida Ked-shouldered Hawk (Ad.), 

 a*. Tail 10-00 long, gray, with several indistinct blackish bands. 



334. Am. Goshawk. 

 b. Three outer primaries emarginate or "notched."* 



^1. Tail with two or three broad whitish bars. 



343. Broad-winged Hawk (Ad.). 

 b^. Tail with numerous narrow, indistinct blackish bars. 



342. Swainson's Hawk (Ad.). 



C. Front of the tarsus smooth, or with the scales not sharply defined ; 



outer primary bai'red. 



a. Wing under 9-00, tail-feathers of nearly equal length. 



332. Sharp-shinned Hawk (Ad.). 



b. Wing over 9-00, outer tail-feathers half an inch shorter than the mid- 

 dle ones ; upper tail-coverts not white. 333. Cooper's Hawk (Ad.). 



c. Wing over 9'00 ; upper tail-coverts white, 331. Marsh Hawk (Ad.). 



D. Tarsus entirely feathered. 



a. Legs rich rufous, heavily barred . 348. Ferruginous Eough-leg. 

 b: Legs ochraceous-buft', more or less barred. 



347a. Am. Eough-legged Hawk. 

 3. Under parts -vrithout streaks or bars. 

 A. Under parts white. 



a. Scales on front of tarsus transverse, more or less square. 



334. Short-tailed Hawk. 



b. Scales on front of tarsus numerous, rounded. 

 51. Tail barred. 



b^. Upper parts not barred 364. Am. Osprey, 



J3. Upper parts barred 353. White Gyrfalcon. 



fi. Tail not barred. 



c". Tail square, white 328. White-tailed Kite. 



6-8. Tail forked, bluish black . . , 327. Swallow-tailed Kite. 

 £. Under parts dark brown, slate, gray, or black. 

 a. Tarsus entirely feathered . . . 347a. Am. Eough-legged Hawk. 

 i. Tarsus partly feathered, scales transverse, more or less square. 

 Ji. Wing over 13-00. 



b^. Upper tail-coverts, base and tip of the tail white ; two outer 

 primaries slightly " notched " .... 330. Everglade Kite. 

 b^. Three outer primaries "notched"* . 342. Swainson's Hawk. 

 b*. Four outer primai'ies " notched " . . 338. Harlan's Hawk. 

 ci. Wing under 13-00. 

 c'^. Primaries more or less distinctly barred ; general plumage sooty 



black 344, Short-tailed Hawk. 



c3. Primaries not barred ; general plumage slaty blue. 



329. Mississippi Kite. 



* See Fig. 70. 



