120 Mr. C. H. B. Grant un Birds collected in Argentina, 



Ad. Irides hazel ; bill and legs and toes black. 



Young. Irides pale hazel ; bill black, gape pale yellow ; 

 legs and toes sooty. 



One of the December and the January and February adults 

 are moulting. 



One of the young birds in first plumage shot in December 

 has the bases of the feathers of the crown yellow ; but this is 

 quite exceptional, as all the others have black crowns. 



Several of the young taken in February and March are 

 moulting into the adult dress, whilst others, no doubt of a 

 later brood, are still in young plumage. 



This is the commonest of the Tyrannidse in the Ajo 

 district, where it is resident. It is both insectivorous and 

 carnivorous, and is frequently seen picking the meat off 

 skins and carcases. When I have broken open the nests of 

 Oven-birds, looking for eggs, and left the young exposed, 

 this bird has more than once eaten them up. 



The nest is a large untidy structure of wool, grass, and 

 other rubbish placed in any convenient situation in a bush, 

 tree, or on the top of a post, the entrance being at the side. 

 Five eggs appear to be the complete clutch, though a set of 

 six is in Miss Runnacles' collection. 



93. Myiodynastes solitarius. 



Myiodynastes solitarius Scl. Cat. B. xiv. p. 185 ; Arg. Orn. 

 i. p. 150. 



a. S ad. Near Villa Pilar, Paraguay. Nov. 7, 1909. 



" Irides brown ; bill black, fleshy at the base of the lower 

 mandible ; legs and toes purplish brown.'' 



94. Myiobius N;Evius. 



Myiobius neevius Scl. Cat. B. xiv. p. 209 ; Arg. Orn. i. 

 p. 151. 



G, ^i. (5* ? ad. Near Santa Elena, N. Argentine. Nov. 15, 

 1909. 



Irides hazel ; bill, upper mandible dark, lower light 

 brown ; legs and toes almost black. 



The crest in the male is lemon-yellow and in the female 

 cinnamon. 



