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. 



SKA-DUCK. 



Genus Fuligula. 



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. 



Fuligula 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- 



