5l8 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



General color: Above glossy black, with green or blue tinge; below 

 white ; a white dorsal patch is generally present and an alar bar of white 

 or whitish on each wing, is constant. 



Fig. 253. Fig. 254. 



Phalacrocorax atriceps. P. U. O. C. 7912. Female. Profile of head. Bill and head from 



above. Reduced. 



Head : Above black, with steel-blue gloss ; there is an admixture of 

 hair-like white feathers in the black of the sides of the head ; the white of 

 the neck invades the region of the side of the head so as to reach above 

 and forward of the ears, which are therefore in the center of the white 

 area ; there is a well developed crest of black, shining feathers, which has 

 a tendency to recurve forward. 



Neck : Above glossy steel-blue black ; this color does not reach down 

 on the sides of the neck ; below pure white with a silky sheen. 



Back: Upper back and interscapular region dull bottle-green with a 

 strong gloss and with no markings or shadings on the feathers, which 

 present uniform color throughout ; lower back, rump and upper tail-coverts 

 uniform steel-blue black, very finely glossed and broken in most indi- 

 viduals by a white dorsal patch of varying shape and extent. 



Tail : Blackish, with a decided dull green tint shading the feathers. 

 There are twelve rectrices. 



Wings : Dull, glossy bottle-green ; the primaries brownish black ; the 



