FALCONIDiE. 



49 



Ungues, medio excepto, in- 

 terne rotundati. 



Remex secunda longissima, 

 prima et secunda fortiter 

 intern^ emarginata. 



Claws, the middle one ex- 

 cepted, internally rounded. 



Second quill longest, the 

 first and second strongly 

 emarginated internally. 



Sp. 1 . El. melanopterus. 



Falco melanopterus. Shanj, v. vii.;?. 1 77. — Leach. Zool. Misc, 

 iii. pi 122.-"Africa, the coast of New Holland, &c. 

 Sp. 2. El. furcatus. 



Falco furcatus. Shnvj, v, vii. 107. — North America. 

 Sp. 3. El. Riocourii. 



El. cinereo-ccBTuleus subtus, fronte, loris, ?nnlis, pennaruni^ue 

 secundariorum apice albis ; tectricibus inferioribus alarutn ni- 

 gerrimis. 



Ashy-blue Elanus with the under parts, the forehead, lores, 

 cheeks, *and tip of the secondary feathers white 3 the lower 

 wing-coverts deep black. 



Falco Riocourii. Vieil. — Temm. PI. Col. 85. 



Inhabits Senegal. Length thirteen or fourteen 

 inches : the plumage is very similar in colour to that 

 of the first species, all the upper parts being of an 

 ashy-blue, which is deepest on the back and on the 

 scapulars, wings, and tail : the tip of the secondary 

 wing-feathers is white : the under wing-coverts are 

 deep black : the forehead, the lores, the cheeks, and 

 the under parts in general are pure white : the tail 

 is considerably forked ; the outer feathers being one 

 inch and a half longer than the rest : the beak is 

 black ; and the legs clear yellow. The young have 

 the tail less forked ; all the feathers of the wings 

 tipped with reddish ; and several slight tinges of yel- 

 lowish and reddish are disposed over the feathers of 



V. XIII. p. II. 4 



