210 ON THE CLASSIFICATION OP BIUDS. 
Nauclebos, Vigors. Bill small^ weak, considerably 
hooked, with a small and nearly obsolete festoon in 
the middle. Orbits and sides of the head thinly pro- 
vided with feathers. Wings very long ; the first 
and second quill internally emarginate towards the 
tip. Tail very long and deeply forked. Tarsi very 
short, not longer than the hind toe and claw ; plumed 
half way in front, the remaining portion covered 
with angulated scales. Toes short ; the two lateral 
almost equal, the hinder nearly equal to the inner. 
Claws grooved beneath. 
N. furcatus. Wils. 51. 2. Africanus. Vieil.Gal.pl. 85. 
Elanus, Savigny. Bill small, much compressed, the 
cutting margins slightly sinuated; the tip of the upper 
mandible very much hooked and prolonged ; the cere 
short ; nostrils large, oval. Wings very long, acumi- 
nated, reaching beyond the tail; the second quill 
longest ; the first emarginated near the tip of the inner 
web. Tail short, almost even. Feet short, thick : 
the tarsus half feathered ; the lower part covered with 
minute roundish suhequal scales. Toes thick and free ; 
the outer toe much shorter than the inner, and of 
equal length to the hinder toe. Claws large ; the lateral 
and the hinder ones smooth and round ; the middle 
claw sharply carinated on its inner side. 
E. melanoplerus. Le Vail. Af. 36, 37. 
Gampwnyx, Vigors. General structure of Elanns, but 
the wings are shorter, and the tail 
longer. Tarsus more lengthened, 
and less plumed in front. Tail 
even. Outer toe shorter than 
the inner. Claws slender, nearly 
cylindrical, {fiy. 188.) 
G. Swainsonii. Zool. Jouni. i. 65. 
SuBFAM. BUTEONINiE. Buzzards'. 
Size moderate ; form slender. Bill small, slightly fes- 
tooned, the base broad, the cere occupying one third the 
length of the bill. Head depressed and unusually broad. 
