378 



PATAGONIAN EXPEDITIONS: ZOOLOGY. 



Lower parts : The under neck, as described, white with a median Hne of 

 black feathers from the throat downward to the much elongated pendant 

 white plumes of the lower neck. 



On either side of the breast and chest a patch of blue black extending 

 back along the abdomen. The middle of the breast apparently streaked 

 black and white, the white feathers being edged with black. The mid- 



FiG. 199. 



Fig. 200. 



Ardea cocoi, adult male. 8638 Princeton Ardea cocoi, adult male. 8638 Princeton 



University Collection. About \ natural size. University Collection. Details of unfeathered 

 La Plata, Argentina, July, 1896. part of leg and foot. About \ natural size. 



region of the chest and abdomen, the entire thighs and under tail-coverts 

 white. Sides of the body, axillaries and under wing-coverts pale slaty 

 blue. 



Bill : Golden yellow, becoming deeper in color and shaded with horn 

 brown above, at the base 



Iris : Pale straw yellow. The bare skin around the eye pale greenish 

 (F. Withington). 



Legs and feet : Dark olive brown, shaded with yellow. 



The adult female resembles the adult male in color, but the elongated 

 plumes of the several regions are not so strongly developed. 



