Birds of Uruguay. 177 



houses with large quintas. A pair in Sta. Elena bred in an 

 old Hornero's nest. The young were out of the nest on the 

 27th October^ and I caught one in ray hand early in the 

 morning as it sat on a fence, evidently feeling the bitterly 

 cold west wind, the thermometer having been only just above 

 freezing-point at sun-up. 



*Alectrurus risouius. Strange-tailed Tyrant. 

 In the Museo de Historia Natural. 



38. SisoPYGis icTEROPHRYs. Yellow-browcd Tyrant. 



A quiet bird, sometimes seen in the monte, with a single 

 sweet note. I shot two at Sta. Elena, both females, one in 

 the quinta on the 2nd November, the other by the Sauce on 

 the 3rd March. 



39. Cnipolegus cyanirostris. Blue-billed Tyrant. 

 Irides reddish hazel ; bill blue with black tip. 



I obtained two specimens in the monte of the Arroyo Grande 

 at Sta. Elena in March. From what little I saw of it, it 

 appeared to be a shy, retiring species, frequenting the thickest 

 wood. The food found in the crop and stomach consisted of 

 remains of small insects. 



40. Lichen OPS perspicillatus. Silver-billed Tyrant. 

 Common, frequenting the bottoms along the sides of rivers 



and canadas, especially where there is thick paja. The 

 females and young disappeared about the end of March or 

 beginning of April, but some old males still remained at the 

 end of May, and are probably resident. I never noticed the 

 antipathy between the sexes mentioned by some writers, 

 although all individuals of this species have a liking for a 

 buffet at one another (or at other species) when they chance to 

 come to close quarters on the wing, just as butterflies do in 

 the air. The male has a rose of naked skin, primrose-yellow, 

 round the eye, crimped, serrated, and wrinkled like the 

 petals of a flower (indeed the eye and rose together look just 

 like a flower) ; iris another shade of same colour, but rather 

 greener ; bill pale primrose. The male loves to sit on the 

 post of a fence, a twig of a low bush, or a big tuft of paja, 



