FALCONS, HAWKS, EAGLES, ETC. 205 



whitish ; tail lighter than back, barred with black, its under surface and the 

 under surface of the primaries grayish. L., IY'00; W., 12-50 ; T., 7 '00 ; Tar., 

 2-35 ; B. from N., -70. 



Range, Florida and Mexico southward through South America. 



Nest, in trees. Eggs (?), dull white, spotted at the larger end with small 

 spots and blotches of reddish brown over about one fourth the surface, 2'16 x 

 161 (Pennock). 



A rare resident in Florida. According to Mr. C. J. Pennock, who 

 found its nest at St. Marks on April 3, its call somewhat resembles 

 the scream of the Red-shouldered Hawk, but is finer and more pro- 

 longed (Auk, vii, 1890, p. 56 ; see also Scott, ibid., vi, 1889, p. 243). 



The MEXICAN GOSHAWK (346. Asturina plagiata) is a tropical species 

 which reaches the southwestern border of the United States. An individual 

 seen by Mr. Robert Kidgway in southern Illinois, August 19, 1871, is the only 

 known instance of its occurrence east of the Mississippi. 



34 7 a. Archibuteo lagopus sancti-johannis (GmeL). AMERI- 

 CAN ROUGH-LEGGED HAWK. Ad., light phase. Upper parts fuscous-brown, 

 margined with whitish and ochraceous-buff ; inner vanes of the primaries 

 white at the base ; basal half of the tail white or buffy, end with two or three 

 grayish or whitish bars ; under parts varying from white to ochraceous-buft, 

 streaked and spotted with black, these marks uniting to form a broken band 

 across the belly ; front of tarsi entirely feathered. Im., normal phase. Simi- 

 lar to the ad., but the end half of the tail without bars except for the white 

 tip, the under parts more heavily marked, with black, the belly band being 

 broad and continuous. Black phase. Plumage more or less entirely black, 

 the primaries and tail barred with whitish and grayish. L., 22-00 ; W., 16-00 ; 

 T., 9-50. 



Remarks. Its feathered tarsi and heavily marked under parts characterize 

 this species. 



Range. North America, breeding north of the United States and winter- 

 ing as far south as Virginia. 



Washington, rare and irregular "W. V. Sing Sing, A. V. Cambridge, not 

 uncommon T. V., Nov. ; Mch. ; a few winter. 



Nest, on rocky ledges or in trees. Eggs, two to five, dull white, sometimes 

 unmarked, but generally more or less spotted, blotched, or scrawled with cin- 

 namon-brown or chocolate, 2*20 x 1-75. 



" The Rough-leg is one of the most nocturnal of our Hawks, and 

 may be seen in the fading twilight watching from some low perch or 

 beating with measured, noiseless flight over its hunting ground. It 

 follows two very different methods in securing its food one by sitting 

 on some stub or low tree and watching the ground for the appearance 

 of its prey, as the Red-tail does ; the other by beating back and forth 

 just above the tops of the grass or bushes and dropping upon its vic- 

 tim, after the manner of the Marsh Hawk. . . . 



" The flight of the Rough-leg is seldom rapid and often appears 



