FALCONS, HAWKS, EAGLES, ETC. 195 



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



337. RED-TAILED HAWK (Ad.) and Races. 



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

 bars . 339. RED-SHOULDERED HAWK (Ad.). 



339rt. FLORIDA RED-SHOULDERED HAWK (Ad.). 

 a 4 . Tail 10-00 long, gray, with several indistinct blackish bands. 



334. AM. GOSHAWK. 



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

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



343. BROAD-WINGED HAWK (Ad.). 

 4*. 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 barred. 



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 ROUGH-LEO. 



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



347a. AM. ROUGH-LEGGED HAWK. 

 3. Under parts without streaks or bars. 



A. Under parts white. 



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



334. SHORT-TAILED HATTK. 



b. Scales on front of tarsus numerous, rounded. 

 J 1 . Tail barred. 



b'. Upper parts not barred 364. AM. OSPREY. 



b 3 . Upper parts barred 353. WHITE GYRFALCON. 



c 1 . Tail not barred. 



c 9 . Tail square, white 328. WHITE-TAILED KITE. 



e. Tail forked, bluish black . . . 327. SWALLOW-TAILED KITE. 



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



a. Tarsus entirely feathered . . . 347. AM. ROUGH-LEGGED HAWK. 



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

 i. Wing over 13-00. 



4 8 . Upper tail-coverts, base and. tip of the tail white; two outer 



primaries slightly "notched" .... 330. EVERGLADE KITE. 



b 3 . Three outer primaries "notched"* . 842. SWAINSON'S HAWK. 



b*. Four outer primaries " notched " . . 338. HARLAN'S HAWK. 



e. Wing under 13-00. 



c 8 . Primaries more or less distinctly barred ; general plumage sooty 



black 844. SHORT-TAILED HAWK. 



c 9 . Primaries not barred ; general plumage slaty b!uo. 



329. MISSISSIPPI KITE. 



* See Fig. 70. 



