17 



Plumage slaty blue, with little trace of white 

 cross bars except on thighs and under wing- 

 co verts ; tail ochraceous, with 2 broad black 

 bands. 

 54. Geranospizias ccerulescens ccerulescens (Vie ill.); 

 N. Diet., X., p. 318 (1817). 

 Grey Crane -Hawk. 



Under pa.rts barred with whitish. 

 54a. Geranospizias ccerulescens gracilis (Temm.), PI. 



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



Wood Hawk. 



Like G. c. ccerulescens, except that general 



plumage is slaty black. 

 54b. Geranospizias ccerulescens niger (Du Bus), Biill. 



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



Black Hawk. 



Venezuela, 

 Guiana, 

 W. Brazil, 

 Peru, Bolivia 

 Argentina. 



Brazil, 

 Paraguay. 



Central 

 America from 

 S. Mexico to 

 Panama. 



Gen. XXI. UROTRIORCHIS Sharpe (1874). 

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

 graduated ; stee large (length 24 in.). 



Above blue grey, lighter on head and nape ; 



upper tail-coverts pure white ; tail very long, 



black above, greyish below, irregularly banded 



and tipped with white ; below leaden grey. 



55. Urotriorchis macrurus (Hartl.), J.f .0., 1855, W. Africa, 

 p. 353. Gold Coast 

 W. African Grey Hawk. to Gaboon. 



Gen. XXII. PARABUTEO Rldgw. (1874). 

 Nostrils with bony tubercle near upper margin ; 

 thighs with overhanging tuft of feathers ; tarsus 

 scaled almost right across and feathered further 

 down 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. 



