BIRDS OF NORTH AND MIDDLE AMERICA. 575 



(Omilteme; Tepetalpa; mountains near Cliilpancingo, December), 

 and Oaxaca (La Parada; Cinco Senores).'* 



(?) Tyrannuht affirm Swainson, Philo.s. Mag., n. s., i, 1827, 3()7 ("maritime parts 

 of Mexico;" sec Salvin and Godman, Biol. Oentr.-Am., Aves, ii, 1889, 78). 



(?) T\yranrmla] affiinis Bonaparte, Consp. Av., i, 1850, 191. 



Empidonax affinis Salvin, Cat. Strickland Coll., 1882, 314 (Cinco Senores, Oaxaca; 

 crit.). — Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1889, 78, part 

 (Amula, Omilteme, and Tepetalpa, Guerrero; City of Mexico and Chimalpa, 

 Mexico; La Parada and Cinco Sefiores, Oaxaca). — Nelson, Auk, xviii, 1901, 

 48 (range). 



[Empidonax] affinis Sharpe, Hand-list, iii, 1901, 140. 



Empidonax fidvipectus Lawrence, Ann. Lye. Nat. Hist. N. Y., x, Feb., 1871, 11 

 (City of Mexico; coll. G. N. Lawrence). — Salvin, Ibis, 1874, 310 (crit.). — 

 Baird, Brewer, and Ridgway, Hist. N. Am. Birds, ii, 1874, 364; Ibis, 1886, 

 468.— Cox, Auk, xii,*l895, 357 (Mount Orizaba, 10,000 feet alt.).— Chap- 

 man, Bull. Am. Mus. N. H., x, 1898, 42 (Las Vigas, Vera Cruz, 8,000 ft. alt.). 



E[vipidonax] fulvipectus Baird, Brewer, and Ridgway, Hist. N. Am. Birds, ii, 

 1874, 364.— Ridgway, Man. N. Am. Birds, 1887, 344. 



Empidonax obscurus (not of Baird; not Tyrannula obscura Swainson?) Sclater, 

 Cat. Birds Brit. Mus., xiv, 1888, 232, part (La Parada, Oaxaca). 



EMPIDONAX TREPIDUS Nelson. 

 CHANCOL FLYCATCHER. 



Similar to E.fulmpectuH, but much darkei; and less })ufFy olive above 

 and paler yellow below, chest and sitles much more grayish, and upper 

 throat conspicuously suffused or intermixed with dusky. 



Adults in spring (sexes alike). — Above plain olive, the ])ileum 

 slightly darker, with feathers still darker medially, the rum]) and 

 upper tail-coverts slightly paler and more greenish olive; tail deep 

 grayish brown (nearly hair brown) , the outer webs of rectrices passing 

 into grayish olive on edges, the outer web of lateral rectrix dull yelloM^- 

 ish white or grayish white; wings darker gra3dsh brown or dusky, the 

 middle and greater coverts broadly- tij^ped with pale buff}^ grayish 

 (forming two conspicuous bands), the secondaries edged (except 

 basalh^) with very pale IjufTy gray or dull whitish, the primaries and 

 greater coverts narrowly edged with pale grayish olive ; a broad white 

 or yellowish white orbital ring, interrupted on upper eyelid; lores 

 mixed yellowish white and dusky (the latter prevailing) ; rest of sides 

 of head and sides of neck similar in color to back but slightly ])aler, 

 gradually fachng l)elow into very pale straw yellow or dull yellowish 

 grayish white on chin and throat; chin and u]^]:)er throat more or less 

 conspicuously suffused or intermixed with dusky grayisli ; chest and 

 sides pale olive-grayish or yellowish gray, becoming much paler on 

 flanks; rest of under parts pale straw or primrose yellow; axillars and 

 under wing-coverts very pale dull straw yellow; inner webs of rem- 

 iges edged with pale buffy grayish; maxilla blackish brown or brown- 



o These specimens from Oaxaca require reexamination. They may represent E. 

 trepidus Nelson. 



