58 



162. Uriibit'mga urubitinga nrubitinga (Gmel. 

 8.N. i., p. 265 (1788). [Brazil] 

 Brazilian Easlc. 



Under wing-coverts and tibiae with more 

 white ; tail with less white and an extra 

 black bar. 

 162a. Urubitinga urubitinga ridgwayi Gurney, 

 List Diurn. Bds. Prey, p. 77, 148 (1884). 

 [Guatemala.] 

 Ridgway's Black Hawk. 



162b. Urubitinga tirubitinga subtilis Thayer and 

 Bangs, Bull. Mus. Harvard, xlvi. p. 94. 

 (1905). [Gorgona I.] 

 Gorgona Black Hawk. 



Black above and below ; upper and under tail- 

 coverts narroAvly tipped with white ; tail 

 with a broad white median band and white 

 tip. 

 163. Urubitinga ayithracina anthracina (Licht.), 

 Preis. Verz. ; Vogel, Mexico, etc., p. 3 (1830). 

 [Mexico.] 

 Mexican Black Hawk. 



J3oubtful form ; said to be dark chocolate 

 brown with 2 more or less distinct extra 

 white bands at base of tail. 

 163a Urubitinga anthracina gundlachii (\ib., J. 

 f.O. (1854). [Cuba.] 

 Cuban Black Hawk. 



Chile, 

 Argentina, 

 Paraguay, 

 E. Peru, 

 Brazil, 

 Venezuela, 

 Guiana, 

 C. America 

 to Costa Rica 



Guatemala 

 and Mexico. 



S.W. 

 Colombia. 



Tropical 

 America to 

 W. Indies, 

 Guatemala, 

 Mexico and 

 Arizona. 



Cuba. 



Gen. XXXIX. LEUCOPTERNIS Kaup (1847). 



Similar in structure to Urubitinga ; nostril nearly 

 circular ; tarsus not more than twice as long 

 as middle toe ; plumage usually more white than 

 black. 



Plumage uniform bluish slate colour ; tail 

 black, with a M'bite median band and white 

 tip. 



