BIRDS OF NORTH AND MIDDLE AMERICA. 



501 



Mazatlan; C'iudad Durango; Sierra dc Valparaiso, Zacatecas; Aimila and 



Omilteme, Guerrcrc)). 

 Mitrephanrs phaoccrais ienuirostiis Brewster, Auk, v, no. 2, Apr., 1888, 137 



(Oposura, Sonera, Mexico; coll. "VV. Brewster). 

 \ Mitrephanes] temiirostris Sharpe, Hand-list, iii, 1901, 136. 



MITREPHANES AURANTIIVENTRIS (Lawrence). 

 YELLOW-VENTED FLYCATCHER. 



Adults (sexes alil'e) . — Above liright greenish olive, the pileimi 

 somewhat darker, with feathers (especially those of crest) dark gray- 

 ish brown or dusky medially, producing more or less distinct streaks; 

 upper tail-coverts and tail dusky grayish brown, the outer webs of 

 rectrices more olive toward edges; wings (except lesser coverts) 

 dusky, the middle coverts tipped with light olive, the greater coverts 

 tipped with paler olive or buff}", the secondaries edged (except basalh") 

 with the same (the edgings usually more whitish or pale j^ellowish on 

 inner secondaries); lores dusky brown, sometimes intermixed with 

 pale cinnamon, buff, or whitish; auricular region olive-tawny, with 

 narrow and indistinct shaft-streaks of paler; sides of neck, throat, 

 chest, and sides of breast plain tawny-cinnamon, passing posteriorly 

 into pale buffy yellow (nearly naples yellow) on flanks, low^er abdo- 

 men, and under tail-coverts; axillars and under wing-coverts similar 

 in color to chest, the coverts near edge of wing more olivaceous and 

 intermixed with dusky; inner webs of remiges edged with light gra}'- 

 ish brown; maxilla dusky brown or blackish, mandible pale yellow- 

 ish; iris brown; legs and feet dusky brown or brownish black. 



Young. — Essentially like adults, but upper parts brown, the feath- 

 ers tipped w4th cinnamon-buffy; posterior under parts light buff 

 instead of yellowish. 



Adult Male.— 'Length, (skins), 109-120 (116); wing, 61.5-69.5 (63.1); 

 tail, 52.5-61 (55.7); exposed culmen, 8.5-11.5 (10.5); tarsus, 12-13.5 

 (12.5); middle toe, 6.5-7.5 (7).« 



Adult fetmde.— Length (skins), 106-120 (112); wing, 57.5-63.5 (59.8); 

 tail, 48-55 (51.3); exposed culmen, 9.5-11 (10.1); tarsus, 12-13 (12.2); 

 middle toe, 6.5-8 (6.9).^ 



"Thirteen specimens. 

 b Ten specimens. 



