Paraguay, Bolivia, and Southern Brazil. 333 



a. ($ ad. Luiconia, Ajo. April 29, 1909. 



Irides dark brown, orbits and cere pale lemon-coloured ; 

 bill pale slate-coloured^ dark at tip ; legs and toes rich 

 lemon-coloured, claws black. 



This specimen agrees with others in the British Museum, 

 and tallies with the description given by E-idgway, having the 

 tail tipped with rufous and the outer feathers un variegated. 

 In Miss Runnacles' collection there is a single male, also 

 taken at Ajo, on the 15th of August, 1909, that agrees with 

 the description by Ridgway of C. australis, having the tail 

 tipped with white and the outer tail-feathers variegated. 



This little Kestrel is only a winter visitant to the Ajo 

 district; but the dates of its arrival and departure I do not 

 know, as very few are seen. I only noticed three or four 

 throughout the winter of 1909. , 



It is usually seen perched on the posts of the wire fencing 

 or the tops of solitary trees, where it is, as a rule, easy of 

 approach. 



187. Elanus leucurus. 



Elanus leucurus Sharpe, Cat. B. i. p. 339; Arg. Oru. ii. 

 p. 71. 



a. S young. Los Ynglases, Ajo. Feb. 20, 1910. 



Quite a rare bird in the Ajo district, and I only observed 

 two individuals during my visits. 



188. ROSTRHAMUS SOCIABILIS. 



Kostrhamus sociabilis Sharpe, Cat. B. i. p. 327 ; Arg. Orn. 

 ii. p. 72. 



This Hawk is not represented in the collections made by 

 me ; but I have seen two young females and an adult male 

 taken at Ajo, in the collection of Miss Runnacles. 



189. MiLVAGO CHIMANGO. 



Ibijcter chimango Sharpe, Cat. B. i. p. 41. 

 Milvago chimango Arg. Orn. ii. p. 74. 

 a. S ' Los Ynglases, Ajo. Sept. 14, 1908. 



Nov. 28, 1908. 

 „ Feb. 14, 1909. 

 „ Mar. 3, 1909. 



2 A 



