216 On the Birds of Estancia St a. Elena. 



10. Myiodynastes solitarius (Arg. Orn. i. p. 150). 



A shy summer visitor, frequenting the trees and taking 

 flights after insects. 



11. Upucerthia dumetoria (Arg. Orn. i. p. 170). 



A winter visitor, arriving in May and departing early in 

 August. 



[Another visitor from the south : Mr. Hudson once 

 obtained a pair near Buenos Ayres. It is common in Pata- 

 gonia. — P. L. S.] 



12. Synallaxis albescens (Arg. Orn. i. p. 179). 

 Found in pairs from September to April. The nest is 



placed low down in weeds or bushes, and is composed of 

 sticks, lined with wool. In shape it is domed, with a pas- 

 sage leading out of the top. In building, a large cup- 

 shaped nest is first made, which is then covered over and a 

 tubular passage added. Eggs three or four, of a pale green 

 colour. 



13. Circus macropterus (Arg. Orn. ii. p. 58). 



A common Hawk here at all seasons, often seen in com- 

 pany with C. cinereus, and beating up its prey from bushes 

 and weeds in much the same way. Its stoop is more powerful, 

 and its longer breadth of wing enables it to fly with more 

 despatch and in a sailing manner. It breeds in the long 

 grass, but, so far, I have not discovered its nest. 



14. BuTEo erythronotus (Arg. Orn. ii. p. 62). 



A winter visitor, living in loose flocks and coming much 

 about houses where there are suitable trees. It is fearless 

 of man and easily shot. The immature birds have the breast 

 thickly spotted with brown, and the tail brown with black 

 bands. 



[Mr. Holland sends a fine adult female specimen with a 

 red back. — P. L. S.] 



15. Larus cirrhocephalus (Arg. Orn. ii. p. 201). 



I found this Gull nesting in company with L. maculi- 

 pennis, though the nests were, to a certam extent, all in the 



