5S6b. 
57. 
28 
Wing 290 ; rather more barred below than 
G. c. c @rulescens. 
Geranospizias caerulescens niger (Du Bus), 
Bull. Ac. Roy. Brux., xiv., p. 103 (1847). 
[Mexico, type in B. M.] 
Black Hawk. 
Wing ¢ 290 mm., 2 310 mm.: like G. c. 
c @rulescens, except that general plumage 
is slaty black. 
Geranospizias gracilis (Temm.), Pl. Col., i., 
pl. 91 (1821). [E£. Brazil, type in Leyden 
Mus.] 
Wood Hawk. 
Larger; wing ad. 325-340 mm.;_ less 
bluish ; the entire under parts barred with 
whitish, some bars also appearing on the 
wings. 
Central America 
from S. Mexico 
to Panama. 
Brazil, E. 
Bolivia, Para- 
guay, N. Argen- 
tina. 
Gen. XXII. UROTRIORCHIS Sharpe (1874). 
Type Astur macrourus Hartl. 
Tail longer than wing, very strongly graduated ; 
58. 
size large (length 24 in’). 
Urotriorchis macrourus macrourus (Hartl.), 
J.£.0., 1855, p. 353. [ex. Temm. MS.—Gold 
Coast, type in Leyden Mus.] 
W. African Grey Hawk. 
Wing ¢$ 303, tail 328 mm. ; wing 9 315, 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 with white ; 
below chestnut. 
W. Africa 
(Gold Coast). 
