BIRDS OF NORTH AND MIDDLE AMERICA. 429 



(■/. Tail relatively longer (difference between length of tail and 

 length of wing decidedly lehis 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 chestiuit s])ot in 



center of yellow breast Oreothlypis (p. 475 ) 



(jg. Rictal bristles distini't, or at least obvious Compsothlypis ( p.478) 



ff. Bill not narrowly wedge-shaped with very acute tip, Imt slcnder-co- 



noidal or sulnilate, with tip of maxilla oljviously decurved; if ai)pr()x- 



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



tomium with distinct subterminal notch, and rictal bristles obvious. 



g. Kictal 1)ristles distinct; wing-tip longer than exposed cuhnen. {Den- 



(Iroicn:. ) 



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



deeply emarginatc; a white spot at base of primaries together 



with two white wing-i)ands Peucedramus (p. 4!)3) 



]il(. Bill slender-conoidal, taperinggradually to the tip; tail bntslightly, 



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 l>ars 



or upper parts streaked Dendroica ( 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 al)domen and lower throat). 

 it. Outermost (ninth) jn-imary shorter than fifth; wing-tip 

 shorter than coumiissure; upper parts {)lain sooty blackish, 

 under parts slate-color with white on lower throat and 

 al)domen; inner wel)S 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, oi' 

 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 

 thi-oat and chest sometimes gray or gray and black. 



Oporornis (j). 621) 

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

 very pale yellow, conspicuously streaked with dusky. 



Seiurus (p. 634) 

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

 ( (Jeotldgpav. ) 

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



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

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

 firm, with broad and rounded tip; under parts i)artly yellow. 



Teretistris (p. ()<S4) 

 17. Maxilla straight; ninth primary longer than first; tail nmch 

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

 acuminate; no yellow Leucopeza (p. 650) 



/(//. Commissure shorter than middle toe with claw . 



