ANATIDZ. 85 
feathers, and culmen longer than 
middle toe, without claw. 
Dafila. (Page 97.) 
@. Tail-feathers broad and rounded at tips. 
Aix. (Page 98.) 
i’, Bill spatulate (very broad near end and narrow 
at base).........00 Spatula. (Page 96.) 
g’. Hind toe with a broad, membraneous lobe. (Subfamily 
Fuliguline.) 
h'. Feathering on lores not reaching beyond posterior 
border of nostril. 
@, 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.) 
‘8, Loral feathering with straight or even 
slightly 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 from nostril. 
j. Distance from tip of bill to loral feather- 
ing less than graduation of tail. 
#, Distance from anterior end of nos- 
tril to loral feathers equal to or 
greater than width of bill at 
base. 
P. 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.) 
?. 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.) 
&, Distance from anterior end of nos- 
tril to loral feathering much less 
than width of bill at base. 
