148 NORTH AMERICAN BIRDS. 
@. Bill only slightly or not at all widened at tip. 
d', Hind-toe present. 
e'. No trace of web between anterior toes. 
f'. Exposed culmen longer than middle toe, with claw ;' inner 
webs of quills and under primary coverts not mottled. 
Tringa. (Page 152.) 
f?. Exposed culmen shorter than middle toe, with claw; inner 
webs of quills and under primary coverts beautifully 
MOttled...........ceeeeveeee Tryngites. (Page 169.) 
é. Middle toe united at base to one or both of the lateral toes by 
a distinct web. 
f'. Tail more than half as long as the wing, graduated for as 
much as the length of the culmen. 
Bartramia. (Page 168.) 
f’. Tail not more than half as long as the wing, and if grad- 
uated, the graduation not more than one-half the 
length of the culmen. 
g. Tail longer than the exposed culmen. 
ht. Wing less than 4.00. (All anterior toes webbed 
at base.}.............. Ereunetes. (Page 161.) 
#. Wing not less than 4.00. 
@. Exposed culmen less than one-fifth as long as 
‘ the wing...... Pavoncella. (Page 168.) 
#. Exposed culmen more than one-fifth as long 
as the wing. 
j- Bill narrow at tip, where hard and 
smooth on top. 
R. Wing less than 4.50. 
Actitis. (Page 169.) 
#. Wing more than 4.50. 
®, Axillars uniform grayish or 
dusky. 
m, Quills entirely dark-col- 
ored; no web between 
inner and middle toes 
at base.. Heteractitis. 
(Page 167.) 
m?, Quills with a conspicuous 
white patch at base; a 
distinct web between 
inner and middle toes, 
at base.. Symphemia. 
(Page 167.) 
1 Except sometimes in Tringa maculata, 
