664 PATAGONIAN EXPEDITIONS I ZOOLOGY. 



coverts and sides of face white, often tinged with cream ; a prominent 

 moustachial cheek-stripe, deep lead-slate in color, defines the chin and 

 upper throat. 



Neck : Chin and throat pure white, which often is shaded with cream- 

 color on the lower throat ; sides of neck whitish, with creamy shade ; above, 

 the neck is concolor with the crown, deep slate-blue, separated from the 

 crown by the broad tawny confluent eye-stripe described. 



Back: Interscapular region much like the crown, but somewhat lighter 

 in tone, each feather with a median hair-line of black and with a very 

 narrow margin of silvery grey or white ; lower back and rump dull slate- 

 blue, almost immaculate ; upper tail-coverts barred blackish brown, slate- 

 blue and white, with white tips and median hair-lines of black. 



Tail : Deep blackish brown, crossed by six narrow pure white bars and 

 broadly tipped with pure white ; the outer rectrices often have the white 

 tips shaded or spotted with dull tawny or pale cinnamon. Seen from 

 beneath, the tail presents almost the same appearance, save that the 

 blackish brown is duller. 



Wings : The upper wing-coverts much like the interscapular region in 

 color and marking; the quills brownish black, washed on the external 

 webs with slate-blue, the internal webs barred strongly with white ; the 

 inner secondaries like the lower back and the entire series conspicuously 

 tipped with white. 



Lower parts : Chin and throat pure white, the lower neck shaded with 

 cream, in turn becoming strong buff on the breast ; the sides deep blackish 

 brown, each feather tipped with white and crossed with four or five definite 

 narrow pure white bars ; the upper or anterior edge of this dark area meets 

 on the mid-breast, forming a narrow band, the dark region slanting back, 

 as it is invaded by the bright tawny rufous of the remainder of the lower 

 parts ; feathers of the thighs and legs, as well as the under tail-coverts, 

 immaculate tawny rufous ; edge of the under wing creamy buff, the rest of 

 the under wing-coverts and axillaries barred blackish brown and white and 

 tipped with white. 



Bill : Yellow at the base, shading to blue horn on the tip ; the cere 

 orange. 



Iris deep hazel-brown. 



Feet orange-yellow. 



Adult female ; cited above. Similar to the adult male, except that the 



