AVES ANATID/E. 487 



"a few breed about Concepcion, as they certainly stay there all summer. 

 It was met with in a greater or less abundance at every point visited, and 

 was usually found in flocks of from ten to fifty individuals." 



"Male. Salto, Buenos Aires, Arg. Rep., Oct. 17, 1881. 



"Female. Salto, Buenos Aires, Arg. Rep., Oct. 12, 1881. 



" Iris crimson. 



"Several of these birds were found in the streams and lagoons. Legs 

 of deep yellow, beak slightly lighter in tint; wattle at the base of the beak 

 a deep orange-red." (E. W. White, P. Z. S., pp. 625-626, 1882.) 



"A single male of this beautiful Duck was received in 1867. In 1870 

 we obtained three pairs from Mr. Weisshaupt's Chilian collections, but 

 they did not breed until 1873. 



"Dates of Hatching of the Rosy-billed Duck. (In the Zoological 



Gardens, London.) 



1873. July 20th. 1876. July ist. 



1874. " 6th. 1879. " nth." 



1875. September 7th. 



(P. L. Sclater, P. Z. S. 1880, p. 524.) 



Genus TACHYERES Owen. 



Type. 

 Micropterus (subgen.), Less. Man. d'Orn. p. 416 (1828) 



(nee Lacep. 1802); Salvadori, Cat. Bds. Brit. Mus. 

 XXVII. p. 373 (1895) I Sharpe, Hand-list Bds. I. p. 224 

 (1899) T. cinereus. 



Micropterus, King, P. Z. S. 1830, p. 15 (nee Lacp. 1802). 



Tachyeres, Owen, Trans. Zool. Soc. IX. p. 254 (1875) . T. cinereus. 



Geographical Range. The Straits of Magellan, Fuegian coast waters, 

 and the Falkland Islands. North on the Atlantic coast to the Rio Negro, 

 and on the Pacific coast to Chiloe Island and Valdivia. 



TACHYERES CINEREUS (Gmelin). 



(Plate I.) 



Oiseau grise, ou Oie de plein, Pernetty, Vog. II. c. 19, p. 21 (1769: Falk- 

 land Isl.). 

 Race-horse Duck, Pernetty, Journ. pp. 213, 214 (1771). 



