318 APPENDIX. 



secondaries lighter green; primaries dark brown, 

 their shafts white, with dusky tips; lesser wing- 

 coverts light blue ; speculum golden-green ; rump 

 and upper tail-coverts greenish-black, a patch of 

 white at the sides of the rump ; tail dark brown, the 

 feathers pointed, broadly edged with white, of 

 which color are the inner webs of the three outer 

 feathers. 



Female with the crown dusky; upper plumage 

 blackish-brown, the feathers edged with reddish- 

 brown ; breast yellowish-white, marked with semi- 

 circular spots of white. Young male with similar 

 markings on the breast ; length twenty inches and 

 a half, wing ten. 



Sba-Duck. 



Oenus Fuligida. 



Generic Distinctions. — In this class the head is 

 rather larger, neck rather shorter and thicker, than 

 in the preceding genus (Anas), plumage more dense, 

 feet stronger, and the hind toe with a broad ap- 

 pendage, which is the principal distinction. 



Canvas-Back. 



FuUgula Valisneria, Wils. 



Specific Character. — Bill black, the length about 

 three inches, and very high at the base ; fore part of 

 the head and the throat dusky; irides deep red; 

 breast brownish-black. Adult male with the fore- 



