AVES PODICIPEDID^. -75 



Sharpe, Hand-List B. I. p. 115 (1899); Martens, Hamb. Magalh. 

 Sammelr. Vog. p. 23 (1900: Str. Magellan); Salvad. Ann. Miis. Genov. 

 (2) XX. p. 633 (1900: Santa Cruz, Patagonia, Jan.); Gates, Cat. 

 Bds. Eggs, Brit. Mus. I. p. 138, pi. XI. fig. 9 (1901). 

 Colynibiis sahadorii, Stejn. Bull. U. S. Nat. Mus. XXIX, p. 13 (1885). 



General description. 



Size. — Total length, about 26.00 inches. 



Culmen (from feathers on forehead), 2.8 to 3.3 inches. 



Wing, 2.7 to 3.3 inches. Tarsus, 2.6 inches. 



Color. — General color above brownish black glossed with dark green, 

 most pronounced on the head and neck. The under parts are satiny 

 white from the lower breast backward ; the upper breast is shaded with 

 silvery rufous, bright chestnut on the lower part of the neck, up to the head. 



Head : Top of head and occiput dark brownish black glossed conspicu- 

 ously with green. The feathers of the occiput and the upper part of 

 the nape, prolonged into a full though short crest. Sides of head deep 

 lead color, darkest in the region back of the ears, and shading into black- 

 ish green. 



Neck : Above dark brownish black, glossed with dark green. Sides 

 and under parts bright chestnut shading into silvery chestnut or rufous on 

 the lower neck. Chin and fore part of neck lead color like the sides of 

 the face, becoming darkest, almost black, where it is sharply defined on the 

 lower part of the throat. 



Back: Brownish black, not so dark as on the head and neck, and 

 glossed with greenish. The feathers of this region have definite brownish 

 white margins as have also the scapulars. The lower back and rump are 

 darker, the feathers lack the brown-white margins, and there is a strong 

 underlying tinge of deep chestnut. 



Wings : Like the back in general color but greyer. The outer primaries 

 are ash brown, whitish on the basal half of their inner webs, this propor- 

 tion of white gradually increases to the innermost quills which are nearly 

 pure white. The secondaries are white. 



Lower parts : Lower breast and abdomen satiny white. Upper breast 

 and sides of breast pale rufous shading into chestnut. Remainder 

 of sides and the flanks brownish ash more or less tinged with rufous. 



