204 



KEY AND UESCRIPTION 



(melanistic) phase, in which nearly the whole plumage is a 

 somewhat glossy black. 



Length, 15-18 ; wing, 10^-13; tail,6-7i, tarsus, 2J ; culmen, |. South 

 America north to Florida, where it breeds. 



17. Mexican Black Hawk (345. Urubithiga anthrac)7id). — A 

 southern Texas, coal-black hawk, with a central broad white 

 band across the tail, and a white tip ; the ends of the upper 

 tail coverts are also white. The young is mottled blackish- 

 brown above and streaked buffy below ; the tail is crossed 

 with about seven bands of blackish and grayish. 



Length, 21-23; wing, 13-16; tail, 8-11; tarsus, 3\ ; cuhuen, IJ. 

 Northern South America north to southern Texas. 



18. Mexican Goshawk {'M(\. Asti(r)na plagiilta). — A south- 

 western, ashy-backed, white-bellied hawk, with a black tail 



crossed by several 

 somewhat broken white 

 bands and a white or 

 whitish tip. The Avhite 

 belly and breast are 

 beautifully and finely 

 barred with dark lines. 

 The young is blackish- 

 brown above and whit- 

 ish below, much mot>- 

 tled with reddish above 

 and blackish below ; 

 tail, like the back, 

 crossed with numerous 

 blackish bars. 

 Mexican Goshawk Len"th 17 • wiii'^ 9,1- 



111 ; tail, 7-8; tarsu.s, 2J ; 



culmen, |. Southwestern border of the United States, south to Panama. 



Once seen in Illinois. 



19. American Rough-legged Hawk (347*. Archibhteo lagopus 

 sancti-johdnnis). — A large, dark-brownish hawk, with rough. 



