AVES FALCONID^. 



631 



"Doubtless a resident, as, although I did not actually find it breeding, I 

 was told that eggs were sometimes taken, and I saw examples at all seasons 

 during my residence in the country ; they were, however, certainly more 

 numerous at the end of summer and in autumn. The fully adult bird has 

 the upper parts grey, barred indistinctly on the wings and tail with a 

 darker lead-grey ; breast grey, with each feather tipped with white ; belly 

 pure white." 



BuTEO POLiosoMA (Quoy & Gaimard). 

 Falco polyosome, Quoy & Gaim. Voy. Uranie, Ois. p. 92, pi. 14 (1824: 



Falkland Islands! 



Fig. 319. 



Biiteo poliosoina. Adult male. Chili. From bird in American Museum. 

 About one-fifth natural size. 



Buteo polyosoma, Less. Voy. Coq. Zool. I. p. 616 (1826: Falkland Is.); 



Des Murs in Gay's Hist. Chil. Zool. I. p. 219 (1847). 

 Astur polyosoma, Guv. R^gn. Anim. I. p. 332 (1829). 

 Buteo poliosoma, Abbott, Ibis, 1861, p. 151 (Falkland Islands, breeds in 



Oct.); Phil. & Landb. Cat. Av. Chil. p. 3 (1868); Scl. & Salv. 



