!1913.] NATURAL SCIENCES OF PHILADELPHIA. 195 



:29. Rupornis magnirostris (Gmel.). Large-billed Hawk. 



Falco magnirostris Gmelin, Syst. Nat., I, i, p. 282, 1788 (Cayenne). 

 Cariaquito, 9 9 January 14 and March 13 (58,699-700). 

 Pedernales, cf March 6 and 9 January 26 (58,696-7). 

 "Iris, cere, skin around eye, and legs yellow." 



:30. Busarellus nigricollis (Lath.). Black -collared Hawk. 



Falco nigricollis Latham, Ind. Orn., i, p. 35, 1790 (Cayenne). 

 La Pedrita, & & February 13 (58,749-50). 

 Cano Corosal, cf February 24 (58,745). 

 "Cere, skin at base of bill and feet light blue, iris hazel." 



31. Buteogallus aequinoctialis (Gmel.). Equinoctial Buzzard. 



Falco cequinoclialis Gmelin, Syst. Nat., I, i, p. 265, 1788 (Cayenne). 

 Pedernales, cf March 6 (58,748). 

 "Base of bill and skin around eye and feet yellow." 



32. TJrubitinga urubitinga (Gmel.). Brazilian Eagle. 



Falco Urubitinga .Gmelin, Syst. Nat., i, p. 265, 1788 (Brazil). 

 Cano Corosal, 9 February 28 (58,746). 

 "Iris hazel, legs, skin around the eyes and cere yellow." 



33. Urubitinga anthracina (Nitzsch). Mexican B!ack Hawk. 



Falco anthracinus Nitzsch, Syst. Pteryl., p. 83, 1840 (Mexico). 

 La Pedrita, Rio Uracoa, (f February 13 (58,693). 

 Cariaquito, 9 February 14 (58,752). 

 "Iris brown, legs yellowish, cere greenish-yellow." 

 The former specimen is in the slaty black plumage, the latter in 

 the light striated stage. 



54. Leucopternus albicoUis (Lath.). White-collared Hawk. 



Falco albicolHs Latham, Ind. Orn., i, p. 36, 1790 (Cayenne). 

 Cariaquito, cf January 20 (58,753). 

 "Iris hazel, legs lemon-yellow." 



35. Herpetotheres cachinnans (Linn.). Laughing Hawk. 



Falco cachinnans Linnaeus, Syst. Nat., Ed. X, i, p. 90, 1758 ("South 

 America ' ' = Cayenne) . 



Pedernales.. 9 March 6 (58,747). 



"Iris hazel, skin at base of bill yellow, legs yellow." 



36. Rostrhamus SOCiabilis (Vieill.). Everglade Kite. 



Herpetotheres sociabilis Vieillot, N. Diet. d'Hist. Nat., .xviii, 1817, 318 (Cor- 

 rientes and Rio de la Plata). 



Cano Corosal, cf Fel^ruary 24 (58,694). 



"Iris carmine, beak black, cere and skin around gape dull yellow, 



feet dull orange." 



