FALCONING. 



Harpagus Vigors.* 



Bill short and compressed, but the lateral margins strongly armed with two distinct teeth near the 

 tip ; the nostrils exposed and oval. Wings moderate, with the third, fourth, and fifth quills the longest. 

 Tail moderate and rounded. Tarsi slender, as long as the middle toe, covered with transverse scales in 

 front. Toes moderate, with the lateral ones unequal. 



The species is peculiar to South America ; but the habits and manners of this bird have not been noticed by any- 

 naturalist. 



H. Udentatus (Lath.) Vigors, PL col. 38. 228. — Bidens rufi- I PL col. 198. ; Bidens femoralis et B. cinerascens Spina, Av. Bras, 

 venter et B. albiventer Spins, Av. Bras. t. 6. ; Falco Diodon Temm. \ t. 7. ; Diodon brasiliensis Less. 



* Established by Vigors (Zool. Journ. i. p. 327.) in 1824. Bidens of Spix (1824), Diodon of M. Lesson (1831), and Diplodon of 

 Nitzsch (1840), are coequal with the name used. 



November, 1844. 



