AVES ANATIDyE. 425 



Head : Entirely white, with a grey tinge on the crown. 

 Neck : Entirely white, except the posterior portion of the back, which 

 is barred evenly with black. 



Back: Mantle barred evenly in stripes less than a quarter of an inch 



FIG. 220. 



CUoiphaga magdlanica. P. U. O. C. 7815. Adult male. Profile showing black barring on 

 back and clear white breast About ] natural size. 



wide. Lower back, rump and upper tail-coverts white. Scapulars dark 

 greyish brown. 



Tail : Two lateral tail feathers white ; the rest dark brown, almost black. 



Wings: Lesser median and upper median wing-coverts white. The 

 greater wing-coverts greyish brown on their inner webs, and glossy metal- 

 lic green on their outer webs, each feather tipped narrowly with white, the 

 whole forming a defined wing speculum. Primaries dark greyish brown ; 

 secondaries pure white ; tertials dark greyish brown. 



Lower parts: Pure white, clearly barred on the flanks with black. 

 Lower wing-coverts, axillaries and under tail-coverts pure white. 



Bill : Black. 



Iris : Dark brown. 



Feet : Dusky plumbeous. 



Adult female (cited). 



Head : Uniform pale snuff brown. 



Neck: Uniform in color with the head. 



Back : Greyish brown, each feather barred terminally with black and 



