Paraguay^ Bolivia, and Southern Brazil. 107 



m-q. S ? ad. et imm. Los Ynglases, Ajo. May 1909. 



r. ? ad. Los Ynglases, Ajo. Feb. 3, 1910. 



A very common and resident species in the Ajo district. 

 During the winter months it assembles in large flocks and 

 does no inconsiderable damage to the maize crops. These 

 flocks present an exceedingly pretty picture with their red 

 heads contrasting with the black wings and body. 



The nest is placed, as a rule, in the caiiadons and is a deep 

 cup-shaped structure of dry swamp-grass built between the 

 stems of strong plants. Three eggs appear to be the full 

 clutch. 



The call is a sort of whistle. 



64. PSEUDOLEISTES VIRESCENS. 



Pseudoleistes virescens Scl. Cat. B. xi. p. 352 j Arg. Om. 

 i. p. 102. 



a. ? ad. Los Ynglases, Ajo. Oct. 30, 1908. 



6. c? ad. „ „ Nov. 24, 1908. 



Iris hazel ; bill, legs, and toes black. 



c. cJ ad. ; d, e. S 'i juv. Los Ynglases, Ajo. Jan, 2, 

 1909. 



f> 9' S ^ j^v. Los Ynglases, Ajo. Jan. 7, 1910. 



One of the commonest of the resident species in the Ajo 

 district, being the "Pecho amarillo'^ of the Spaniards; it is 

 usually found in flocks throughout the year, especially 

 during the winter months. It is an inquisitive and noisy 

 bird, especially when going to roost. 



The nest is placed either in the herbage in the caiiadons 

 or in low bushes or shrubs in the woods, and sometimes in 

 the Tala trees ; it is a large cup-shaped structure. Five or 

 six eggs seem to be the full clutch, though this number is 

 not often found, owing to the Cow-birds Molothrus bonari- 

 ensis and M. rufoaxillaris being parasitic on this species, 

 especially the latter. In some nests I have found only the 

 eggs of the Cow-bird, those of the Yellow-breast having 

 been all destroyed. 



