284 African Zoology. 



bluish grey ; interscapulars, back, rump, and scapulars, bluish 

 grey ; shoulders jet black ; chin, throat, breast, belly, vent, 

 and inside of wings, pure white. Primary and secondary wing 

 coverts bluish grey, with the edges of inner vanes white, and 

 some of the feathers distinctly tipt with that colour ; primary 

 quill feathers hoary grey, shaded towards tips with reddish 

 brown ; secondaries bluish grey. Tail slightly forked, pale 

 bluish white ; shafts dark reddish brown ; legs and toes yellow ; 

 claws black. Length eleven inches. 



Young. Bill black ; base of under mandible, and the part 

 of the upper one adjoining it, yellowish ; front reddish white ; 

 crown and back of neck dusky, slightly variegated with very 

 fine reddish tawny streaks ; interscapulars dirty blackish blue, 

 with fine reddish white tips ; back uniform dusky blue ; scapu- 

 lars dirty blackish blue, with a tinge of brown, and all broadly 

 tipt with dull white ; shoulders black, many of the feathers 

 faintly tipt with white. Primary and secondary wing coverts 

 bluish grey, many of them with white tips ; primary wing 

 feathers blackish blue with white tips; secondaries with reddish 

 white tips. Chin and throat white ; breast and belly pale 

 tawny or dull reddish white ; thighs white. Tail a pale dusky 

 blue with shades of brown ; part of edges of inner vanes white ; 

 tips of feathers white or tawny ; legs and toes yellow ; claws 

 black. 



Inhabits South Africa. 



Elanus Melanopterus, Leach. Falco melanopterus, Daud. 

 Orn. Le Blac, Le Vaill. Ois. d'Afriq. &c. 36 & 37. 



Genus NAUCLERUS. Vigors. 



Bill weak, compressed ; nostrils sub-oval, oblique ; wings 

 long, second and third quills longest ; tail long and deeply 

 forked; tarsi short, weak, and reticulated ; feathered below the 

 knees. 



Nauclerus Riocourii, Vigors. Body above ashy grey ; be- 

 low pure white; a white stripe on the forehead ; a line before 

 and behind the eye black. Tail grey ; bill black ; cere and 

 tarsi yellow ; second quill feather the longest. Length fourteen 

 inches and a half. 



Inhabits Senegal. 



Elanoides Eiocurii, Vieill. 



SUB-FAM. BUTEONINA. 



Bill curved from the base, the edges entire ; tarsi naked or 

 covered with feathers ; wings almost as long as the tail ; figure 

 rather robust. 



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