508 Mr. E. Gibson on the Ornithology of [Ibis, 



Were beating against the winrl^ rising and falling, or soaring 

 in spiral circles ; occasionally one or two would alight on a 

 tree. 



" 20 November, 1901. Some eight or ten Buzzards (similar 

 to the above-mentioned) seen in vicinity of Linconia estancia. 

 Flight slow and heavy ; occasionally wheeled in circles. Fi'e- 

 quently liton ground, and allowed oE fairly near approach on 

 horseback. 



" 3 December, 1901. Three or four seen in above locality. 



" 29 December, 1901. Seven or eight passed over Yngleses 

 iiead-station in afternoon, flying leisurely north. With one 

 or two exceptions all were adults, but in my hurried rush 

 for a gun I had to content myself with the last straggler of 

 the lot^— an immature bird — which fell to a charge of number 

 six shot at a considerable height. Later on Gumming shot 

 another immature specimen in the wood. (Both these skins 

 were unfortunately lost before their identity was establislied. 

 The plumage was exceedingly soft and loose, and the skin 

 extraordinarily thin and delicate.) 



" 3 January, 1902. One adult seen on north side of 

 Yngleses. 



" 3 January, 1904*. A flight of about a dozen beat over 

 Yngleses head-station, Hying south." . 



As will be seen from the preceding, these rare and 

 irregular occurrences of a gregarious and striking bird of 

 prey naturally impressed me, and I could liave wished to 

 have been more fortunate in the acquisition of specimens. 



297. Buteo erythronotus King. Red-backed Buzzard. 

 This bird has not been recorded in the locality again 

 since I obtained a pair in June of 1875. 



300. Geranoaetus melanoleucus Vieill. Chilian Eagle. 



In my former paper (Ibis, 1879, p. 409) I dealt at length 

 with this — our largest and most strikingly handsome bird 

 of prey. 



I know that it subsequently continued to frequent and 

 nest in its old haunts in the rincones for several vears, but 



