138 BIRDS. 



aa. Bill and legs "black ; neck black. . . BRANTA, 3. 

 *** Lores feathered ; tarsus scutellate in front ; Ducks. 

 f Bill depressed ; the lamellae simple, bluntish. 

 ^ Hind toe simple, not bordered by membrane. " River 



Ducks." (ANATIN^E.) 



&. Head crested ; tip of bill formed entirely by the. nail ; 



colors brilliant in $. . . . . Arx, 11. 



&&. Bill very much widened towards the tip ; speculum 



green SPATULA, 10. 



&&&. Head not crested ; bill not much widened towards tip. 

 c. Tail wedge-shaped, at least f length of wing. 



$ of DAFILA, 5. 



cc. Tail less than half length of wing. 

 d. Bill shorter than head. 



e. Crown streaked ; tail feathers acute. DAFILA, 5. 

 ee. Crown creamy or white ; speculum green. 



MARECA, 7. 



dd. Bill about as long as head ; speculum white ; wing 

 coverts chestnut. . . CHAULELASMUS, 6. 

 ddd. Bill a little longer than head. 

 /. Speculum violet, bordered with black and white. 



ANAS, 4. 

 ff. Speculum green. 



g. Wing coverts sky blue ; head of $ plumbeous or 



purplish. . . . QUERQTJEDULA, 8. 



gg. Wing without blue ; head of $ chestnut, with 



green band ; almost crested. . NETTION, 9. 



JJ Hind toe lobed (bordered by membrane.) " Sea Ducks." 



(FULIGTJLIISLE.) 



h. Cheeks bristly ; colors black and white (or gray.) 



CAMPTOI^EMTJS, 16. 



Till. Tail pointed, longer than wings (in adult) ; bill black 

 and orange HARELDA, 15. 



JMi. Tail rounded ; the feathers stiff, narrow, exposed nearly 

 to their bases, the upper coverts being very short. 



ERISMATURA, 20. 



