Birds of Paraguay. 69 



This young bird was shot in a swamp. It is very similar 

 to that described by Dr. Bowdler Sharpe (Cat. B. Brit. Mus. 

 xxiv. p. 82), but has the chestnut colour of the adult plumage 

 just appearing. 



Ybytimi is twenty miles south-east of Sapucay, and a very 

 similar district \W. F.~\. 



21. POLYBORUS THAltUS. 



Falco tharus Molina, Saggio St. Nat. Chil. p. 264 (1782). 



Caracard Azara, Apunt. i. p. 42. no. iv. (1802). 



Polyborus vulgaris Vieill. N. Diet. d'Hist. Nat. v. p. 257 

 (1816, ex Azara). 



Polyborus tharus Sharpe, Cat. B. Brit. Mus. i. p. 31 

 (1874) ; Berlepsch, J. f. O. 1887, p. 122 (Paraguay) ; 

 Ihering, Revista Mus. Paulista, vi. p. 337. 



a. S a d. Sapucay, August 19, 1904. 



Cere and bare skin round the eye of a deep salmon- 

 colour; tarsi and feet yellow ; ins bright brown. 



[ Resident and not uncommon in this district : it invariably 

 goes in pairs all the year round. Its food consists almost 

 exclusively of grasshoppers, frogs, and small snakes. I have 

 never noticed any carrion propensities in the Paraguayan 

 specimens. 



As the bird is never interfered with, it has become 

 wonderfully tame, and horsemen can approach it to within a 

 few yards : it will then fly quietly to one side. — W. F.~\ 



22. MlLVAGO CHIMANGO. 



Chimango Azara, Apunt. i. p. 47. no. v. (1802). 



Polyborus chimango Vieill. N. Diet. d'Hist. Nat. v. p. 260 

 (1816). 



Ibycter chimango Sharpe, Cat. B. Brit. Mus. i . p. 41 

 (1874). 



Milvago chimango Hartl. Ind. Azara, p. 1 (1847) ; Ber- 

 lepsch, J. f. 0. 1887, p. 122 (Paraguay) ; Sharpe, Hand-list 

 B. i. p. 244 (1899) ; Ihering, Revista Mus. Paulista, vi. p. 337. 



a. £ ad. Ybytimi, February 10, 1904. Bill, tarsi, and 

 feet yellow ; iris clear light brown. 



