178 NORTH AilEiUCAN BIRDS. 



Subfamilies. 



A. Rill oonir'al, its bristles vpit woak, or wanting. 



a. JJill .sMl.-,onical, iIr. c.ilnien and coinnn-ssuro nearly straifrht 



iylvicolinae. luM.t weak, not reaehin- near the .mkI oHhe tail Wintr 

 l.o.nt.nl, ccnsxieral.lv longer than the nearly even or slightly eniar-i- 

 nate,l la,l. Feet .iark-eolore,l (exeq.t in IMuHherns, IMnaia, ami 

 J'iinil(i). Aiboreal. ' 



Geothlypinae. Feet str.mg, reaching nearly to en.l of the tail Win- 

 roinided. F.'et i)inkit;h-while. Tvrrp.vriul. 

 h. Bill high and coinj)ressed, the oulnien an.l eommissuro ninoh enrved 



Ictenan*. Bill without noteh or rietal bristles ; wing nn.eh ronn.led 

 shorter than the tail. ' 



B. Bill depressed, its bristles strong. 



Setophaginae. Bill, turamnue^ considerably broader than hi<di the tin 

 "...re or less hooked, and with a distinct notch. Rietal bristles reaching 

 hall-way, or more, to the tip. 



Sections and Genera. 



.SVI.VICOI.IN.K. 



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



Mniotilteae. Bill much compressed lor terminal half, the lateral outline 

 dcMdedly concave ; eulmen and gonvs decidedly convex ; connnissuro 

 n.oderatcly concave. Rietal bristles very inconspic.ons; noteh iust 

 perceptible . . ir ■ -, 



2. Mi<ldle toe. with claw, not long.M- than taisu.s. •■•••• ^^Imotdta. 

 VermivorecB. Bill without a distinct notch, or lacking it entirely ; rietal 

 bristles wanting, or very nnnule; eulmen and gonys nearly straight; bill 

 onl}' very moiierately compres.><ed, 

 ". Jliddle toe and claw al)out equal to tarsus. 



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

 perce,,tiblc ; bristles apparent . . .^ . . . 'Protonotaria. 



m\ moderately acute, I'obu.st ; no notch; eulmen straight, its base 

 elevated and slightly nn-lied ; bristles not appar(>nt . ' . ' Ihll,„ii„ 

 Bill moderately acute ; robust; no notch ; eulmen conve.x, its ba^^e 



not elevatpd; bristles apparent Helmitherm. 



t>. Middle toe and claw considerably shorter than tarsus. 



Bill very acute, its outlin.'s nearly straight ; notch not perceptible ; 

 bristles not apparent . ir i ■ n i 



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

 bristles stronc: . . ' ' /> , 



Sylvicole». Bill distinctly notched; rietal bristles .strong; outlines 

 generally slightly curved. 



Bill acute, gonys .slightly concave IWhsogkma. 



Bill not acute, gonys conve.x Dendnnea. 



OKOTIIt.Yl'IN.fl, 



3. Wings pointed, longer than the nearly <'ven tail. 

 Seiureae. 



.\iiove olive-brown ; beneath white with dark streaks . Seiurus. 



Above olive-green; beneath yellow without streaks . . Opornnm. 



