AVES ANATID^. 485 



Bill : With a conspicuous wattle at the base, most developed above. 

 Rosy red in the breeding season, with the tip and nail black. At other 

 seasons of the year the bill loses this brilliant shade, being wholly deep 

 yellow, with the wattle at the base orange, or reddish orange of varying 

 intensity ; the tip and nail black. The under mandible is orange-yellow, 

 with a defined black tip. 



Fig. 246. 



A 



Mctopiana pcposaca. Male. P. U. O. C. 8698. Foot and webs from in front. Reduced. 



Feet : Feet and legs deep yellow. 



Iris : Crimson or golden red in the breeding season ; at other seasons 

 brownish red, yellowish red, or clear yellow. 



Adult female : 8705 P. U. O. C. Ensenada, Province of Buenos Aires, 

 Argentina, March, 1895. Pozzi Collection. General color snuff-brown 

 in varying shades ; below, the feathers are broadly tipped with white, 

 obscuring the brown of their bases. 



Head : Crown and occiput deep seal-brown ; sides of head and face 

 pale snuff-brown, shading into the white of the chin and throat. 



Neck : Upper throat and chin isabelline white, almost pure in some 

 individuals ; the rest of the neck concolor with the face and sides of the 

 head and becoming decidedly brighter or more intense, a chestnut shade 

 prevailing where it joins the back and breast. 



Back : With some shading of chestnut on the extreme upper part of 

 the mantle, the mantle, upper back, rump, and upper tail-coverts are deep 

 seal-brown, rather glossy, but varying little in tone. 



Tail : Deep seal-brown like the back ; seen from below, the rectrices 

 are pale whitish brown. 



Wings : Scapulars deep seal-brown, some of the longer ones with a 

 dull greenish gloss ; primaries white, shaded over with pale seal-brown, 

 and tipped with darker seal like the back ; the outer webs of the four or 



