ANATID^. 85 



feathers, and eulmen longer than 

 middle toe, without claw. 



Dafila. (Page 97.) 

 f . Tail-feathers broad and rounded at tips. 



Aix. (Page 98.) 

 A^ Bill spatulate (very broad near end and narrow 



at base) Spatula. (Page 96.) 



Hind toe with a broad, membraneous lobe. 

 h}. Feathei'ing on lores or forehead not reaching 

 beyond posterior border of nostril. 

 i}. Graduation of tail less than length of bill from 

 nostril. 

 j^. Loral feathering with a decidedly convex 

 anterior outline ; nail less than one- 

 third as wide as width of bill across 

 middle portion. Aythya. (Page 101.) 

 p. Loral feathering with straight or even 

 slightl}^ concave anterior outline ; 

 nail more than one-third as wide as 

 bill across middle portion. 



Netta. (Page 100.) 

 ^^. Graduation of tail much more than length of 

 bill fi'om nostril. 

 /. Distance from tip of bill to loral feather- 

 ing less than graduation of tail. 

 A'\ Distance from anterior end of nos- 

 tril to loral feathers equal to or 

 greater than width of bill at 

 base. 

 Z\ Distance from anterior end of 

 nostril to tip of bill much 

 less than from same point 

 to loral feathers ; tail less 

 than twice as long as tarsus. 

 Glaucionetta. (Page 104.) 

 P. Distance from anterior end of 

 nostril to tip of bill much 

 greater than from same 

 point to loral feathers ; 

 tail more than twice as 

 long as tarsus. 

 Charitonetta. (Page 106.) 

 k^. Distance from anterior end of nos- 

 tril to loral feathering much less 

 than width of bill at base. 



