444 PATAGONIAN EXPEDITIONS I ZOOLOGY. 



(1845) ; Des Murs in Gay's Hist. Chil. Zool. I. p. 450 (1847) ; Hartl. 

 Naum. 1853, pp. 217, 222 (Valdivia) ; Cass. U. S. Astron. Exped. 

 Birds, p. 202 (1856) ; Pelz. Reise Novara, Vog. p. 138 (1865 : Chili) ; 

 Scl. P. Z. S. 1867, p. 335 (Chili) ; Phil. & Landb. Cat. Av. Chil. p. 

 42 (1868) ; Scl. & Scl. P. Z. S. 1876, p. 380 ; Scl. P. Z. S. 1880, p. 

 519; Reichen. Orn. Centralbl. 1882, p. 19; Burm, An. Mus. Nac. 

 Buenos Aires, Part X. p. 248 (1888: Str. Magellan) ; Tristr. Cat. Coll. 

 B. p. 49 (1889) ; James, New List Chil. B. p. 9 (1892) ; Salvad. Cat. 

 B. Brit. Mus. XXVII. p. 215 (1895); Lane, Ibis, 1897, p. 192 (Rio 

 Pilmaiguen : Rio Bueno) ; Schalow, Zool. Jahrb. Suppl. IV. p. 676 

 (1898: Punta Arenas, Feb.) ; Sharpe, Hand-list B. I. p. 217 (1899) ; 

 Carbajal, La Patagonia, Part II. p. 282 (1900); Martens, Hamb. 

 Magalh. Sammelr. Vog. p. 24 (1900: Straits of Magellan). 

 Anas chalcoptera, Kittl. Mem. Acad. St. Petersb. II. p. 471, pi. 5 (1835) ; 

 Fraser, P. Z. S. 1843, P- :I 9 (Colchagua, rare) ; Reichenb. Syn. Av. 

 Natatores, pi. 100, figs. 2766-67 (1850) ; Licht. Nomencl. Av. Mus. 

 Berol. p. 101 (1854: Chili) ; Gray, Handl. B. III. p. 82 no. 10650 

 (1871) ; Scl. & Salv. Nomencl. Av. Neotr. p. 129 (1873). 



GENERAL DESCRIPTION. 



Size. Total length, about 21.5 inches. 



Wing, 10.4. 



Oilmen, 1.9. 



Tail, 4.7. 



Tarsus, 1.7. 



Color. General color ; brown in varying shades, with areas of white on 

 face and neck, and with darker wings, having fine specula of metallic purple. 



Head : Dull brown, darkening into blackish on the forehead and crown. 

 In front of the eye there is a large white spot on the face. 



Neck : Brown like the head ; the chin and lower throat white, which 

 color spreads out lower down on the sides of the neck, leaving only a 

 narrow area of brown on the nape. 



Back : Deeper brown than the neck and becoming glossy on the mantle 

 and lower back ; each feather of the upper back, and some of those of the 

 mantle proper, margined with paler dull brown like that of the neck. 

 The lower back is deepest in color, approaching black. This color shades 

 into olive-greyish on the rump and upper tail-coverts. 



