28 



Wing 290 ; rather more barred below than 

 G. c. ccBYulescens. 



56b. Geranospizias ccsrulescens niger (Du Bus), Central America 



Bull. Ac. Roy. Brux., xiv., p. 103 (1847). from S. Mexico 



[Mexico, type in B. M.] to Panama. 

 Black Hawk. 



Wing c? 290 mm.. ? 310 mm. : like G. c. 

 cceyulescens, except that general plumage 

 is slaty black. 



57. Geranospizias gracilis {Temm.), Fl. Col., i., Brazil, E. 



pi. 91 (1821). \E. Brazil, type in Leyden Bohvia, Para- 



Mus.] guay, N. Argen- 



Wood Hawk. tina. 



Larger ; wing ad. 325-340 mm. ; less 

 bluish ; the entire under parts barred with 

 whitish, some bars also appearing on the 

 wings. 



Gen. XXn. UROTRIORCHIS Sharpe (1874). 

 Type Astur macrourus Hartl. 



Tail longer than wing, very strongly graduated ; 

 size large (length 24 in'). 



58. Urotriorchis macrourus macrourus (Hartl.), W. Africa 

 J.f.O.,1855,p. 353. [ex. Temm. MS.— GoW (Gold Coast) 

 Coasl, type in Leyden Mus.] 

 W. African Grey Hawk. 



Wing S 303, tail 328 mm. ; wing ? 315. tail 

 354 mm. ; above blue grey, lighter on head 

 and nape ; upper tail-coverts white ; tail 

 very long, black above, greyish below, 

 irregularly banded and tipped \nth wliite ; 

 below chestnut. 



