434 



ANATID^. 



brown ; the speculum of the wing white, as in the male. 

 Weight 1-| lbs. The Author has seen a dead female that 

 was known to be old, with the feathers at the base of the 

 upper mandible speckled with white, like the adult female 

 of the Scaup ; and with some elongation of the occipital 

 feathers. 



The young male resembles the female ; but he is larger, 

 and by the end of September he has begun to assume the 

 dark head, although there is as yet no sign of a tuft. 

 Weight If lbs. 



The very young nestling is with difficulty to be distin- 

 guished from the young of the Scaup, but the bill is some- 

 what smaller and narrower at the tip. 



The trachea in the Tufted Duck is about seven inches 

 long, the tube somewhat larger at the upper end, below that 

 of nearly equal diameter throughout ; the figure underneath 

 shows the form of the tympanum. 



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