A NEW RAPACIOUS BIRD. 23 



nirostris, Gtn., to be the bird figured in pi. enl. 464, which is a very common South 

 American species of Astur. 



Dr. Latham, in his article on F. magnirosiris, Gen. Hist., vol. i., p. 282, gives a 

 description of a bird suspected by him of being the species intended by Gmelin, 

 which applies very well to Cymindis cayanensis, Gm., in young plumage, but not to 

 the species now described. 



I have named this species in honour of Thomas B. Wilson, M. D., as a slight 

 tribute to his high personal merit, and to his munificence as a patron of Zoological 

 science. 



