208 



14. FUSCA. VELVET DUCK. 



A. nigricans, palpebra inferiors speculoque alarum 

 albis. Lath. 



The bill is broad and short, the sides yellow, hook 

 red, and a tubercle at the base ; irides whitish ; the 

 plumage is sooty black, with a white spot behind 

 each eye, and on each wing ; the legs are red, the 

 nails black. 



Length 21 inches. 



The female has no protuberance at the base of 

 the bill ; a white spot behind the ears ; the plumage 

 inclined to brown. 



Ladyrinth consists of an oblong bony cavity of 

 an inch in length, situated just below the larynx, 

 about the size of a walnut. 



15. NIGRA. SCOTER, OR BLACK DIVER. 



A. rostro basigibbo, corpore toto nigro. Lath. 



The bill is black, with a bright yellow stripe down 

 the upper mandible, and a process at the base; 

 irides are dusky; the plumage is black; the tail of 

 16 feathers; the legs are brown. 



The female has the bill wholly black, without the 

 knob ; the upper parts are dusky brown ; the chin, 



