BIKDS OF NOBTH AND MIDDLE AMERICA. 429 



ii. Tail relatively longer (difference between length of tail and 

 length of wing decidedly leas than one-fourth the length of the 

 latter) ; throat orange and back black, or else back olive-green, 

 a conspicuous white superciliary stripe, and a chestnut spot in 



center of yellow breast Oreothlypis ( p. 475 ) 



gg. Rictal bristles distinct, or at least obvious Compsotlilypia (p. 478) 



ff. Bill not narrowly wedge-shaped with very acute tip, but slender-co- 

 noidal or subulate, with tip of maxilla obviously decurved; if approx- 

 imately narrowly wedge-shaped with very acute tip, the maxillary 

 tomium with distinct subterminal notch, and rictal bristles obvious. 

 g. Rictal bristles distinct; wing-tip longer than exposed culmen. {Den- 

 droicie. ) 

 h. Bill subulate, of nearly uniform depth for most of its length; tail 

 deeply emarginate; a white spot at base of primaries together 



with two white wing-bands PencedramuB (p. 493) 



hh. Bill slender-conoidal, tapering gradually to the tip ; tail but slightly, 



if at all, emarginate; no white spot at base of primaries, or else 



no white wing-bands. 



i. Tail more than two and a half times as long as tarsus; inner webs 



of rectrices partly yellow or white, or else wing with white bars 



or upper parts streaked Deudroica (p. 496) 



j. Tail not more than two and a half times as long as tarsus 

 (usually much less); inner webs of rectrices without yellow 

 or white (or if partly white the under parts dark slaty with 

 white on abdomen and lower throat). 

 k. Outermost (ninth) primary shorter than fifth; wing-tip 

 shorter than commissure; upper parts plain sooty blackish, 

 under parts slate-color with white on lower throat and 

 abdomen; inner webs of lateral rectrices with a white ter- 

 minal spot Catharopeza (p. 619) 



kk. Outermost (ninth) primary longer than fifth; wing-tip 

 • equal to or longer than commissure; upper parts plain 

 olive-green, olive, or olive-grayish, the head sometimes 

 gray or gray and black; under parts of body yellow, or 

 conspicuously streaked with dusky on a white or very 

 pale yellow ground; inner webs of lateral rectrices with- 

 out white terminal spot. 



I. Tail rounded; under parts yellow, without streaks, the 



throat and chest sometimes gray or gray and black. 



Oporornis (p. 621) 



II. Tail even or slightly emarginate; under parts whitish or 



very pale yellow, conspicuously streaked with dusky. 



Seinrus (p. 634) 

 gg. Rictal bristles obsolete; wing-tip shorter than exposed culmen. 

 ( Geolhlypea: ) 

 h. Commissure equal to or longer than middle toe with claw. 

 i. Maxilla strongly curved; ninth primary shorter than first; tail 

 slightly double-rounded or nearly even, the rectrices narrow, 

 firm, with broad and rounded tip; under parts partly yellow. 



Teretistris (p. 684) 

 ii. Maxilla straight; ninth primary longer than first; tail much 

 rounded, the rectrices broad and rather soft, with tips sub- 

 acuminate; no yellow Leucopeza (p. 650) 



hh. Commissure shorter than middle toe with claw. 



