346 BROOKLYN INSTITUTE MUSEUM. SCIENCE I ULLETIN 2. 6. 



an adult male was taken at the same point in June and a female in 

 July, and a second female (immature) was taken at Las Barrancas 

 in August. In every case the crop was examined and found to be 

 full of the bodies of snails from which the shells had been removed. 

 Iris primrose yellow; maxilla black, mandible greenish sulphur 

 yellow with distal half of cutting edge slate color; cere parrot green; 

 feet deep chrome yellow. 



Leptodon cavennensis (Gmelin). 

 Falco cayennensis Gm., Syst. Nat. I. 1788. p. 263. 

 Leptodon cayennensis Berlepsch & Hartert, p. 114. 



Rare. A single female of this species was taken at Caicara, 

 February 23, 1898, on my first expedition to the Orinoco. 



Eye gallstone yellow ; bill black ; cere deep chrome yellow ; feet deep 

 chrome yellow. 



ROSTRHAMUS SOCIABILIS (Vicillot). 



Herpetotheres sociabilis YieiWoi, N. Did. d'Hist. Nat., XVIII: 1817: 

 318 (Corrientes and Rio de la Plata). 



Rostrhamiis sociahilis Stone, Proc. Ac. Nat. Sci. Phil. 1913: p. 195 



(Cafio Corosal). 



The Everglade Kite was observed as far as Ciudad Bolivar. Stone 

 records it from the delta region. 



Gampsonyx swainsoni Vigors. 

 Gampsonyx swainsoni Vig., Zool. Journ. II. 1825. p. 69; Berlepsch & 



Hartert, p. 114. 



Native name Gavilan primito. Not uncommon. 



This and the succeeding species live in the thinly wooded savanna 

 regions of the middle Orinoco and were not observed beyond the falls 

 of Atures. Specimens were collected at Agua de Salada, Ciudad 

 Bolivar, Altagracia, Caicara and Quiribana de Caicara. They feed 

 chiefly on insects, such as locusts, small lizards, etc., but parts of 

 small birds were found in the stomach of two of those examined. 



Eye chestnut; bill black; cere (very inconspicuous) blackish; feet 

 chrome yellow, claws black. 



A nest containing two downy young and one egg (pipped) 

 together with the female parent was collected at Agua Salada de 



