66 PATAGONIAN EXPEDITIONS : ZOOLOGY. 



This description is taken from an adult female, no. 7809, Princeton 

 University Collection obtained at Rio Gallegos, Patagonia, May 21, 1896. 



Geographical Range. Central and Southern South America, Peru, 

 Argentine Republic and Uruguay to the Straits of Magellan. 



A young bird, no. 8327 Princeton University Collection, taken at Arroyo 

 Eke, Patagonia, 14 April, 1898, has the following characteristics. The 



entire body, including the wings, and the lower neck 

 where it joins the breast is in a plumage very like 

 that of the non-breeding period of the adult. The 

 bird has evidently fully completed a moult from the 

 down stage for the parts spoken of, and though the 

 neck and head, about to be described in detail, have 

 also gone through a similar moult, they still retain 

 a semi-down kind of feathering. 



The color of the neck from the breast to the head 

 is deep isabelline, the throat and chin pure white. 



Podicipesamericanus. There j s a centra l crown str i pe o f sanc jy rufous, CX- 

 8327. Princeton Uni- ,. ,, ., . ,.... 111 



versity Collection. Pro- tendm g wel1 on to the occiput. This is bounded by a 

 file of head of young. rather broader black stripe on each side. These stripes 



are denned in their turn by superciliary stripes that 

 are bright rufous where they begin to show on the forehead and gradually 

 they become lighter until they are concolorous with the hind neck. There 

 is a narrow black stripe beginning on the forehead and reaching back 

 above the eye, becoming broader and less well defined behind. The 

 forehead and lores are sandy brown. Below the eye another black stripe 

 starts at the angle of the mouth, proceeding backward to the region of the 

 ear coverts. Back of the eye an isabelline stripe divides the upper and 

 lower black eye stripes. Below the lower black eye stripe is another light 

 stripe, pale rufous where it originates at the mouth and becoming isabelline 

 or almost white posteriorly. Very narrow black stripes define the line of 

 the jaws on each side of the throat for about half an inch. 



A young bird, almost full grown, but in the down plumage throughout, 

 No. 7808 Princeton University Collection, taken at Cape Fairweather, 

 Patagonia, 7 February, 1898, is, I suspect, one of a brood of young 



