AVES PODICIPEDID/E. 



83 



portions of that region. The description is based on material in the Uni- 

 versity Museum collected at various points in North America, and on the 

 material cited below from the Pozzi collection. 



Fig. 49. 



Fig. 50. 



Podilymbns podicipcs. 8630. Princeton 

 University Collection. Profile of adult male. 

 Buenos Ayres. Natural size. 



Podilymbns podicipcs. S631. Prince- 

 ton University Collection. Profile of adult 

 female. Buenos Ayres. Natural size. 



It will be noticed that all these birds were taken in the winter. The two 

 adults show traces of the black throat patch and in the male it is clearly 

 defined, though not fully developed. However, it is clear that the area 

 occupied by the black is much more extensive than in specimens of this 

 species from North America. It extends much farther down on the throat 

 and higher up on the sides of the face and neck. The bill is much more 

 robust and the birds are appreciably larger than any birds I have seen from 

 North America. 



The immature bird still shows traces of the neck striping about the 

 throat. It is a full grown bird with no traces of down. The under parts 

 are much darker than in North American representatives, and this is par- 

 ticularly noticeable on the breast and belly, and on the sides and flanks. 

 Nowhere is there any clear silky white area, and the general under color 

 is dusky brown, shaded with silky feathers of a curious gray cast, the 



