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. 

 Podicipcsainencaims. fhere is a central crown stripe of sandy rufous, ex- 

 8327. Princeton Uni- ^^^^ ^^g^ ^^^ ^^ ^he occiput. This is boundcd by a 



versity Collection. Fro- ° ' . 



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



are defined 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 



