AVES ANATID^. 



415 



Wing, 17.6. 



Culmen, 2.7. 



Tail, 5.9. 



Tarsus, 3.8. 



The female adults do not differ from adult males in size. (Adult female 



Fig. 217. 



Fig. 218. 



Coscoroba coscoroba, 7960 P. U. O. C. 

 Profile of head and bill. About \{ natural size. 



The same : bill from above. 



P. U. O. C. 8318. Rio Chico de Santa Cruz, Patagonia, 14 March 1898, A. 

 E. Colburn.) 



Color. — Adult male cited above. Pure white throughout, except the 

 terminal portion (two to three inches) of the primaries, which is black. 



The adult female is like the adult male in color. 



"Iridus: Light speckled red" (Withington). "Feet and bill pink" 

 (Cunningham). 



Geographical Range. — Paraguay, Uruguay, and south through Argen- 

 tina and Chili, throughout Patagonia and to the Falkland Islands. 



Mr. Hatcher found the Patagonian White Swan generally distributed 

 throughout Patagonia. In his MS. notes he writes that it is "not nearly 

 so plentiful as the Black-necked Swan, but of the same distribution. A 

 very wary bird, systematically shy." 



Mr. Hatcher is not alone in his experience with the White Swan of 

 Patagonia ; Cunningham in his admirable notes and Hudson both seem 

 to have met with the Black-necked Swan much more frequently than with 



