654 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



bufFy white or whitish, each feather with a narrow dark median stripe ; the 

 sides of the head and face white, or isabelline, with ashy centers to the 

 feathers ; upper region of the ear-coverts immaculate ashy brown. 



Neck : Whitish, or isabelline, with ashy centers to the feathers ; darker 

 above like the crown. 



Back : Interscapular region ashy brown, with a decided chocolate suf- 

 fusion and pearl-grey shading ; upper back similar ; rump and upper tail- 

 coverts darker ashy brown, without the grey shading; the tail-coverts 

 tipped broadly with white. 



Tail : Black ; the feathers are tipped with white and a broad white 

 median band crosses them ; the outer feathers show traces of a second 

 white band near their bases. 



Wings: Primaries black, shaded on their external edges with grey; 

 secondaries grey, with an ashy tinge, with a broad subterminal bar of 

 black and blackish mottling, each feather tipped with white; the inner 

 secondaries and the remainder of the upper wing surface like the back; 

 under wing-coverts clear pale grey, varied with white streaks and margins 

 to the feathers ; axillaries similar. 



Lower parts : The entire under surface of the body immaculate ashy 

 brown ; the thigh feathers deep brown, shading to black toward the tarsal 

 joint, with white margins to the feathers ; the under tail-coverts ashy 

 brown, with broad margins and tips of clear white. 



Bill : Blue horn-color, shading to yellow at the base cere yellow. 



Iris : Brown or reddish brown. 



Feet : Feet and legs clear deep yellow. 



The sexes do not appear to differ in either size or color. 



Geographical Range. — From Veragua in Central America, southward 

 to Chili and northern Patagonia. 



The part of Patagonia in which this bird has been recorded was not 

 entered by the naturalists sent out by Princeton, and we can therefore 

 contribute little to the history of the species. 



Subfamily, Aquiline. 



Sharpe, Cat. Birds Brit. Mus. i. p. 225 (1874); Sharpe, Hand-List Birds, 

 i. p. 260 (1899). 



