of the Waterfowl of South America. 



489 



bird could be identified and in wbich ways it differed from 

 tlie non- flying Tachyeres cinereus except by its power of 

 flight, has never been placed on record, so far as I know. 



The bird figured by Oustalet as Micropterus (i. e, Tach- 

 yeres) patachonicus looks like an abnormally brown or 

 immature Tachyeres cinereus, of which it has the bill, 

 whilst the short bill of tlie bird figured as Tachyeres cinereus 

 would point to its being a male of the flying species. I am 

 afraid that Mr. Keulemans was not very accurate when he 

 made the drawings. 



Text-figure 12. 



A. Head of a young example of Tachyeres cinereus ; B. Of a female 

 T. patachonicus ; C. Of a male T. patachonicus. All from specimens 

 from ihe Falkland Islands now in the Leyden Museum. 



Tachyeres cinereus, the non-flying bird, is an enormously 

 big and heavy Duck, with very small wings, and is entirely- 

 confined to the sea. 



Both sexes when adult are grey in this species, with a 

 white underside and a white wing-speculum. The male is 

 the lighter coloured of the two, and has a lighter head. 



The bill in both sexes when adult is orange-yellow, ligliter 

 in colour in the male. It is rather long in shape with a sliyht 

 depression in the top line. 



