178 NORTH AMERICAN BIRDS. 



Subfamilies. 



A. Bill conical, its bristles very weak, or wanting. 



a. Bill suli-fonieal, the culmen and commissure nearly straight. 



Sylvicolinee. Feet weak, not reaching near the end of tlie tail. Wing 



pointed, considerably longer than the nearly even or slightly emargi- 



nated tail. Feet dark-colored (e.xcept in Hehnithcrus, Hdinaia, and 



Piirufa). Arboreal. 



Geothlypinse. Feet strong, reaching nearly to enil of the tail. Wing 



rounded. Feel pinkish-white. Terrestrial, 

 h. Bill higli and conijiressed, the culmen and commi.ssure much curved. 



Icterianae. Bill without notch or rictal bristles; wing much rounded, 



shorter than the tail. 

 B> Bill depressed, its bristles strong. 



Setophaginse. Bill, tyrannine, considerably broader than high, the tip 



more or less hooked, and with a distinct notch. Rictal bristles reaching 



half-way, or more, to the tip. 



Sections and Genera. 



SYLVICOLIX.E. 



1. Middle toe. with claw, longer than tarsus. 



Mniotiltese. Bill much compressed for terminal half, the lateral outline 

 decidedly concave ; culmen and gonys decidedly convex ; commissure 

 moderately concave. Ri:tal bristles very inconspicuous ; notch just 

 perceptible ........... Mniotilta. 



2. Middle toe. wiih claw, not longer than tarsus. 



Vermivoreae. Bill without a distinct notch, or lacking it entirely ; rictal 

 bristles wanting, or very minute; culmen and gonys nearly straight; bill 

 only very moderately compressed. 



a. Middle toe and claw about equal to tarsus. 



Bill not acute ; culmen and gonys decidedly convex ; notch just 

 percc]itible ; bristles apparent ...... Proionotaria. 



Bill moderately acute, robust; no notch; culmen straight, its base 

 elevated and slightly arched ; bristles not apparent . . Uelinaia. 



Bill moderately acute ; robust; no notch ; culmen conve.x, its base 

 not elevated ; bristles apparent ffeimilherun. 



b. Middle toe and claw considerably shorter than tarsus. 



Bill very acute, its outlines nearly straight ; notch not perceptiljle ; 



bristles not apparent IMminihophar/n. 



Bill very acute, its outlines nearly straight ; notch just perceptible ; 



bristles strong . . I'ariiki. 



Sylvicolese. Bill distinctly notched; rictal bristles strong; outlines 

 generally slightlj' curved. 



Bill acute, gonys slightly concave Perissoglossa. 



Bill not acute, gonys convex Dendroica. 



GF.OTni.TPIN.-E. 



3. Wings pointed, longer than the nearly even tail. 



Seiurese. 



Above olive-brown; beneath white with dark streaks . Seimus. 



Above olive-green ; beneath yellow without streaks . . Oporornis, 



