17 



54. 



Plumage slaty blue, with little trace of white 



cross bars except on thighs and midor wing- 



coverts ; tail ochraceous, Avith 2 broad black 



bands. 



Geranospizias ccBridescens ccerulescens (Vieill.), 



N.Dictr.x., p. 318(1817). 



Grey Crane -Hawk. 



54a. 



Under jiorts barred with whitish. 

 Geranospizias ccerulescens gracilis (Tenim. 

 Col, i., pi. 91 (1824). 

 Wood Hawk. 



PI. 



Like G. c. ccerulescens, except that general 

 plumage is slaty black. 

 51b. Geranosjnzias ccerulescens nirjer (Du Bus), Bull. 

 Ac. Roy. Brux., xiv., p. 103 (1847). 

 Black Hawk. 



Venezuela, 

 Guiana, 

 W. Brazil, 

 Peru, Bolivia 

 Argentina. 



Brazil, 

 Paraguay. 



Central 

 America from 

 8. Mexico to 

 Panama, 



Gen. XXI. UROTRIORCHIS Sharpe (1874). 

 Tail (13 in.) longer than wing (12 in.), very strongly 

 graduated ; size large (length 24 in.). 



Above blue grey, lighter on head and nape ; 

 vipper tail-coverts pure Avhite ; tail very long, 

 black above, grejash below, irregularly banded 

 and tipped with white ; below leaden grey. 



55. Urotriorchis macrurus (Hartl.), J.f.O., 1855, W. Africa, 

 p. 353. Gold Coast 

 W. African Grey HaAvk. to Gaboon. 



Gen. XXII. PARABUTEO Ridgw. (1874). 

 Nostrils with bony tubercle near upper margin ; 

 thighs with overhanging titft of feathers ; tarsus 

 scaled almost right across and feathered further 

 doAvn than length of middle toe. 

 Size large (length about 23 in. ; wing about 12-14 in.). 



General colour blackish brown, variegated by 

 lighter spotting ; lesser wing-coverts and 

 thighs rufous ; tip and base of tail and also 

 tail-coverts white. 



56. Parabuteo unicinctus unicinctus (Temm.), PI. S. America, 

 Col . , pi . 3 1 3 ( 1 824) . northward 

 One-banded Buzzard-Hawk from Chile 



on W. and 

 Buenos Ayres 

 on E. 



