582 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult female. —Length (skins), 124-134 (130); wing, 64.5-66.5 (65); 

 tail, 54-60 (57.2); exposed culmen, 11.5-12 (11.7); tarsus, 16.5-17.5 

 (16.7); middle toe, 8.5-9 (8.9).° 



Highlands of central and southern Mexico, in States of Durango 

 (Chacala), Morelos (Cuernavaca; ITuitzilac), Vera Cruz (Mirador; 

 Cordova; Perote), Michoacan (Mount Tancitaro), Guerrero (Omil- 

 teme), and Oaxaca (Pluma). 



Empidonax bairdi Sclater, Proc. Zool. Soc. Lond., 1858 (pub. Nov.), 301 

 (State of Oaxaca, s. Mexico; coll. P. L. Sclater); Ibis, 1859, 442 (Cordova, 

 Vera Cruz; Oaxaca); Cat. Am. Birds, 1802, 230, part (Cordova); Cat. Birds 

 Brit. Mus., xiv, 1888, 2.30 (Cordova; excl. citation Lawrence, Ann. Lye. 

 N. Y., vii, 327, =E. virescens.) — Baird, Brewer, and Ridgway, Hist. N. Am. 

 Birds, ii, 1874, 363 (Mirador, Vera Cruz).— Ridgway, Ibis, 1886, 466.— 

 Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1889, 74, part. 



[Empidonax] bairdi Sclater and Salvin, Nom. Av. Neotr., 1873, 52, part. — 

 Sharpe, Hand-list, iii, 1901, 1.39. 



E[mpidonax] bairdi Baird, Brewer, and Ridgway, Plist. N. Am. Birds, ii, 1874, 

 363. 



E[mpidona.r] bairdii Ridgway, Man. N. Am. Birds, 1887, 341. 



[Pyrocephnhis] bairdii Gray, Hand-list, i, 1869, 361, no. 5494. 



Empidonax bairdi ocadentalis Nelson, Auk, xiv, Jan., 1897, 53 (Pluma, Oaxaca; 

 coll. U. S. Nat. Mus.). (See Nelson, Auk, xvii, 1900, 264.) 



EMPIDONAX SALVINI Ridgway. 

 SALVIN S FLYCATCHER. 



Similar to E. difficilis hairdi, but olive-green of upper parts much 

 brighter, and color of chest more olive-greenish. 



Adults (sexes alike). — Above plain bright olive-green; tail dusky 

 grayish brown, the outer webs of rectrices passing into olive-green 

 on edges ; wings dusky, the middle and greater coverts broadly tipped 

 with light buffy olive, olive-buffy, or dull buff (forming two distinct 

 bands), the secondaries edged (except basally) with pale olive or 

 olive-buff, the primaries narrowly edged with the same; a broad 

 orbital ring of dull white or yellowish wdiite, interrupted on upper 

 eyelid; lores mixed whitish and dusky; rest of sides of head and 

 sides of neck similar in color to upper parts, fading gradually below 

 into pale grayish olive-yellow on chin and throat; chest light olive- 

 green, this continued laterally over sides, becoming paler on flanks; 

 rest of under parts light yellow (sulphur to primrose) ; axillars and 

 under wing-coverts pale yellow (primrose), becoming brighter or 

 deeper on edge of wing; inner webs of remiges edged with pale gray- 

 ish buffy; maxilla black or brownish black, mandible wholly brownish 

 white (in dried skins) ; legs and feet dusky brown. 



" Four specimens. 



