99 



black ; tail black with median white 

 band (25-30 mm.) and white tips; in 

 younger birds a second white band nearer 

 base. 



Gen. XL. LEUCOPTERNIS Kaup (1847). 

 Type by subs, desig. (Gray 1855) Falco melanops Lath. 



Similar in structure to Urubitinga ; nostril nearly 

 circular ; tarsus not more than twice as long 

 as middle toe ; plumage usually more white than 

 black. 



165. Leucopternis schistacea schistacea (Sundev.) 

 (Efv. K. Vet. Akad. Forh. 1850, p. 142 

 (1851). [Brazil.-] 

 Slate-coloured Hawk. 



Wing c? 240, ? 303 mm. ; plumage uniform 

 slate colour ; tail black, with a white 

 median band and white tip. 



E. Peru, C. and 

 N.E. Brazil, 

 Columbia ? 



*165a. Leucoptetnis schistacea plumbea Salv., Ibis., 

 1872, p. 240, pi. viii. [Ecuador.] 

 Plumbeous Hawk. 



Wing cJ 248-255 mm. ; uniform leaden grey; 

 wings and tail black, latter with a median 

 bar of ashy-white ; under wing-coverts 

 white and tibial plumes more or less barred 

 with same. 



Ecuador, 

 W. Colombia, 

 Panama. 



166. Leucopternis alhicollis alhicollis (Lath.) Ind. 

 Orn. 1, p. 36 (1790). [Cayenne.] 

 White-collared Hawk. 



Wing cJ 320-337, ? 365 mm. ; general 

 plumage white ; head streaked with black, 

 interscapulary region spotted with black ; 

 scapulars and wing-coverts black spotted 



French, Dutch, 

 and British 

 Guiana, 

 Trinidad, 

 Venezuela and 

 Amazonia to 

 Ecuador and 

 Peru. 



