586 BULLETIN 50, UNITED STATES NATIONAL MUSEUlVf. 



EMPIDONAX TIMIDUS Nelson. 

 DURANGO FLYCATCHER. 



Most like E. alhigularis, but paler brown above, especially on 

 pileum; under parts decidedly paler, especially on chest and under 

 wing-coverts, the latter clear uniform buff toward margin of wing. 



Adult male. — Above plain grayish brown (hair brown), becoming 

 brighter or tinged with buffy on lower back, rump, and upper tail- 

 coverts; tail deeper grayish brown, the rectrices with outer webs 

 passing into pale buft'y grayish brown on edges, the outer web of 

 lateral rectrix very pale grayish buffy or grayish buffy whitish; 

 wings deep grayish brown, the middle and greater coverts broadly 

 tipped with brownish buff, forming two conspicuous bands, the pos- 

 terior of which is paler and less brownish buffy; secondaries edged 

 (except basally) with pale grayish buffy; auricular region and sides 

 of neck similar in color to pileum but slightly paler, fading below 

 (rather abruptly) into the buffy white of chin and throat; indistinct 

 orbital ring and anterior portion of lores very pale buffy; chest very 

 pale yellowish buffy, slightly tinged with pale grayish olive, passing 

 into pale buffy grayish brown or olive laterally; rest of under parts very 

 pale yellowish buff, tinged with pale grayish olive on sides and flanks; 

 thighs deep brownish buff, the upper portion suffused with dusky; 

 axillars and under wing-coverts pale buff, the latter becoming deeper 

 buft' toward edge of wing; inner web of remiges broadly edged with 

 pale dull buffy; maxilla deep brown or dark horn color; legs and 

 feet dusky brown; length (skin), 123; wing, 62; tail, 55.5; exposed 

 culmen, 11; tarsus, 16; middle toe, 10." 



Northwestern Mexico, in State of Durango (El Salto). 



Empidonax timidus Nelson, Auk, xvii, July, 1900, 263 (El Salto, Durango; coll. 



U. S. Nat. Mus.). 

 [Empidonaxl timidvs Sharpe, Hand-list, iii, 1901, 137. 



EMPIDONAX ATRICEPS Salvin. 

 BLACK-CAPPED FLYCATCHER. 



Adults in breeding season (sexes alike). — Pileum and hindneck uni- 

 form sooty black ; back, scapulars, and rump plain olive or olive-brown 

 (varying much in intensity) ; tail dusky grayish brown to nearly 

 black, the outer web of lateral rectrix white; wmgs dusky grayish 

 brown to dull black, the middle and greater coverts more or less 

 broadly tipped with grayish brown (more or less deep), the seconda- 

 ries edged (except basally) with pale grayish brown or whitish; auricular 

 region grayish brown or olive (more or less deep), the sides of neck 



o One specimen (the type). 



