EMPIDONAX. 341 



culmen .48-.59 (.54), bill from nostril .30-.32 (.31), 

 width at base .25-.28 (.26), tarsus .64-.68 {.QQ). 

 Female: Wing 2.40-2.50 (2.45), tail 2.00-2.25 

 (2.11). Nest embedded in mossy bank, stump, or 

 log, composed of green moss, dry leaves, fine 

 sticks, etc., lined with fine black rootlets, dried 

 grass-blades, etc. ; external diameter about 4.00- 

 4.50, depth about 2.25-4.00; cavity about 1.25- 

 1.50 deep by 2.00 across. Eggs usually 4, .73 X 

 .51, colored like those of E. difficilis. Hah. East- 

 ern North America, breeding from northern 

 United States northward ; south, in winter, 

 through eastern Mexico and Central America 



to Panama 463. E. flaviventris Baird. 



Yellow-bellied Flycatcher. 

 p. "Wing-bands darker than lower parts. 

 g^. Above dull olive. 



Adult: Above dull olive, the wing-bands dull 

 light olive, sometimes inclining to russet ; 

 lower pai-ts pale olive-yellowish, more de- 

 cidedly olivaceous on breast; edge of wing 

 dull ochraceous or fulvous ; wing 2.60-2.80 

 (2.72), tail 2.40-2.55 (2.49), culmen .58-.60 

 (.59), bill from nostril .32-.33 (.32), width at 

 base .25, tarsus .65-.70 (.68). Hah. Southern 

 and eastern Mexico (Oaxaca, Cordoba, Mira- 

 dor, etc.). 



E. bairdii ScL. Baird's Flycatcher.^ 

 ^^ Above bright olive-green. Adult : Above bright olive- 

 green, the wing-bands similar, but paler, some- 

 times inclining to ochraceous; lower parts green- 

 ish sulphur-yellow, distinctly shaded across breast 

 and along sides with olive-green ; edge of wing 

 clear sulphur-yellow; wing 2.50-2.90 (2.75), tail 

 2.15-2.65 (2.44), culmen .60-.63 (.61), bill from 

 nostril .32-.35 (.34), width at base .28-.30 (.29), 

 tarsus .68-72 (.70). Hah. Highlands of Guatemala. 

 E. salvini Kidgw. Salvin's Flycatcher.^ 

 d^. Lower parts not distinctly yellowish, 

 e^ First quill longer than seventh. 



p. First quill usually equal to or longer than fifth ; color uni- 

 form olive-green or greenish gray above. (Length 

 5.50-5.90.) 



1 Empidonax bairdii ScL., P. Z. S. 1858, 301. 



2 Empidonax salvini Ridgw., Ibis, Oct. 1886, 459. 



