TACHYTRIORCHIS. BUTEO. 233 



Kest. " It is supposed to build its nest of twigs on very tall 

 trees " (Schomhurffk). 



Egcis. Tlnuescribed from British Guiana. 



Ra'.ige in British Guiana. Upper Ponieroon River (/S'cAojn^iny^-). 



Habits. Schomburgk writes (Reis. Guian. iii. p. 739) tbat he 

 only once met with this beautiful bird of prey, and tliat was in the 

 dense virgin forest near the Upper Pomeroon River, from which 

 he gathered that to be its favourite haunts. It is supposed to build 

 its nest of twios on verv tall trees. 



Genus BUTEO Lacep. 

 Buteo Lacepede, Tableau Oiseaiix, 1799, p. iv. Type B. luteo (Linn.). 



In this genus the rioge of the bill exceeds half the length of 

 the middle toe, the tail is more than twice the length of the 

 tarsus, the wings, wlien closed, do not reach to the tip of the tail, 

 the nostrils are long ovals with no tubercle, and the tarsus is bare. 



Key to ilie Species. 



A. Tail grey banded witli brown, the bands 



and inters})aces about equal in width ... _B. v.nicolor, p. 233. 



B. Tail white with grey narroAv crescentic 



bars and a broad black subtemiinal band. B. liypospodius, p. 235. 



149. Buteo unicolor. 

 Black Buzzard. 



Buteo unicolor d"Orbigny, Syn. Av. p. 7, Mag. de Zool. 1S37 (''Hab. 



provincia Ayupayacensi. rep. Boliviana ") ; Salvin, Ibis, ISSG, p. 72 



(Roraima, 35U0 ft., Meiauue Mts.). 

 Buteo erythronotus (nee King), Sharpe, Cat. B. Brit. ]\Ius. i. p. 172, 



1874. 



Adult male. General colour aliove and below black or dark 

 brown witli wliite bases to the feathers and a shade of hoary grev on 

 the outer webs of the primary and secondary quills, some of whicdi 

 liave indications of bars whicb are more pronounced on the inner 

 webs, tlio third and fourth priniaiy-qiulls incised on tbe outer web, 

 and the first, second, and third incised oji the inner web ; the long 

 up|)er tail-coverts have })ale edges at the tips ; tail hoaiy grey barred 

 with lirown, the bars being about nine in nun)ber, including tlic 

 subtemiinal band, which is wider than the rest on the middle 

 feathers, tiie outer feathers somewhat darker than the middle ones, 

 with an incliinition to white mottled bars on the inner webs ; the 

 feathers on each side at the liase of the fcucdiead white; the sfiace 



