143 NORTH AMERICAN BIRDS. 



c". Bill only slightly or not at all widened at tip. 

 dK nind-too present. 



e'. No trace of web between anterior toes. 



/'. Exf)osed culmen longer than middle toe, with claw;' inner 



webs of quills and under primary- coverts not mottled. 



Tringa. (Page 152.) 



/'. Exposed culmen shorter than middle toe, with claw; inner 



ivebs of quills and under primaiy coverts beautifully 



mottled : Tryngites. (Page 1G9.) 



e'. Middle toe united at base to one or both of the lateral toes by 

 a distinct web. 

 /'. Tail more than half as long as the wing, graduated for as 

 much as the length of the culmen. 



Bartramia. (Page 1G8.) 

 /'■'. 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. 



A'. Wing less than 4.00. (All anterior toes webbed 



at base.) !Ereunetes. (Page ICl.) 



kl Wing not less than 4.00. 



i'. Exposed culmen less than one-fifth as long as 



the wing Pavoncella. (Page IGS.) 



j'. Exposed culmen more than one-fifth as long 

 as the wing. 

 f. Bill narrow at tip, where hard and 

 smooth on top. 

 *'. Wing less than 4..50. 



Actitis. (Page 169.) 

 i*. Wing more than 4.50. 



r. Axillars uniform grayish or 

 dusky. 

 »j\ Quills entirely dark-col- 

 ored ; no web between 

 inner and middle toes 

 at base.. Heteractitis. 

 (Page 107.) 

 m''. Quills with a conspicuous 

 white patch at base; a 

 distinct web between 

 inner and middle toes, 

 at base.. Symphemia. 

 (Page 107.) 



* Except sometimes in Tiinffa niaculula. 



