604 PATAGONIAN EXPEDITIONS I ZOOLOGY. 



barred, banded and tipped much like the central pair ; the black bars on 

 the outer pair of rectrices shade distinctly with cinnamon, or bright rufous ; 

 the tail appears much lighter, seen from below, as the black bars are suf- 

 fused on the lower surface with white, or silver. 



Wings: Upper coverts, including the primary coverts, bluish ash or 

 grey, with blackish brown banding; the quills bluish grey, banded with 

 deep brown ; the primaries shading into sepia toward the tips and banded 

 with deep brown ; the secondaries much like the primaries, except that the 

 inner series are black in tone and shaded like the upper back ; seen from 

 below, the wings appear ashy, deep grey in tone, the inner webs of the 

 primaries being shaded with cinnamon near their bases. 



Lower parts : Chin white ; throat and foreneck black or blackish ; the 

 rest of the under surface white, chiefly immaculate, but with a few black 

 streaks on the breast, the flanks barred with rufous brown, the abdomen, 

 vent and thighs almost immaculate, the under tail-coverts with a few dull 

 rufous bars, the under wing-coverts and axillaries white, with an even 

 barring of dull blackish in both regions. 



Bill dark horn-brown, almost black ; cere bluish. 



Feet lemon-yellow. 



Iris pale yellow. 



Immature birds; young of the year. Head: Forehead-, a supraciliary 

 streak, region in front of eye and fore part of cheeks dirty white ; crown 

 deep brown, with tawny rufous or cinnamon edges to the feathers; ear- 

 coverts deep brown ; facial dull fulvous, somewhat streaked with dark 

 brown. 



Neck : Nape and sides deep brown, varied with lighter buffy markings ; 

 throat and chin whitish ; lower neck dark brown, each feather margined 

 with fulvous. 



Back : Mantle, lower back and rump deep dark brown, each feather with 

 tawny rufous or bright cinnamon tips ; this is most apparent on the rump ; 

 the upper tail-coverts white, pure in tone and barred with dark brown or 

 cinnamon brown. 



Tail : Ashy grey, with four bars and a subterminal broader band of 

 blackish brown, each rectrix tipped with dull white or fulvous. 



Wings : All the upper wing-coverts, including the primary series, deep 

 brown, like the back, and with tawny rufous or bright cinnamon tips to the 

 feathers ; the quills all ashy grey, becoming dark brown toward the tips 



