156 Zoologica: N. Y. Zoological Society. [I; 7 



feathers further advanced; crown, nape and sides of the neck 

 thickly sprinkled with black blood-feathers. Bill orange yellow. 

 Bill 35 mm., tarsus 47 mm. 



This specimen was skinned and preserved in its juvenal 

 plumage. 



Individual C. 



Seven Weeks Old. 



Shows sooty feather-bases on only the anterior part of 

 crown, where they are very pronounced. Black feathers on 

 breast are more scattered and more advanced than in A and B ; 

 thighs bluish black. One or two dark feathers appear on the 

 crown. Bill clear orange yellow. Bill 31 mm., tarsus 45 mm. 



Sixteen Weeks Old. 



Similar to A, but breast and abdomen uniform black, only 

 the under tail coverts tinged with blue. No white feathers 

 remain. The thighs are deep black, very slightly tinged with 

 blue near the tarsal joint; these feathers have evidently been 

 renewed. The under wing-coverts have been moulted and are 

 deep black, slightly tinged with blue. Back, scapulars, carpal 

 edge, and wing-coverts have been moulted, but not the remiges 

 or rectrices. Bill and legs clear yellow, iris dark slaty gray. 

 Bill 33mm., tarsus 47 mm. 



