340 NORTH AMERICAN BIRDS. 



c 1 . Upper parts umber-brown, the top of head sometimes much darker 

 (sooty). 



Above dull brown, darker on top of head, the wing-bands varying 

 from dull light brownish buff to tawny ; chin and throat white ; 

 rest of lower parts pale smoky buff, shaded with smoky brown 

 across breast (whole lower parts dull whitish in much worn 

 plumage) ; under wing-coverts and thighs deep buff or ochra- 

 ceous ; wing 2.35-2.40 (2.37), tail 2.15-2.32 (2.24), culmen .60- 

 .67 (.64), bill from nostril .32-.3S (.33), width at base .30, tarsus 

 .67-.6S (.67). Hab. Southeastern Mexico (Vera Cruz) to high- 

 lands of Guatemala. 



E. albigularis SCL. White-throated Flycatcher. 1 

 c 2 . Upper parts olive, olive-greenish, or olive-grayish. 

 d l . Lower parts distinctly yellowish. 



e 1 . Under wing-coverts pale buff, deepening into ochraceous on 

 edge of wing. (Length 5.50-6.00.) 



Adult : Above dull grayish olive (more brownish in win- 

 ter), the wing-bands dull light buffy grayish (more 

 buffy in winter) ; lower parts pale dull yellowish, in- 

 clining to sulphur-yellow on belly and under tail-cov- 

 erts, and faintly shaded with dull grayish brown across 

 breast. Young : Similar, but browner above, with wing- 

 bands ochraceous, or rusty buff, the sulphur-yellow of 

 belly, etc., replaced by dull white. Male : Wing 2.50- 

 2.90 (2.65), tail 2.35-2.60 (2.43), culmen .57-.63 (.61), 

 bill from nostril .29-.33 (.31), width at base .25-.2S 

 (.27), tarsus .64-.69 (.68). Female: Wing 2.30-2.60 

 (2.44), tail 2.20-2.45 (2.32). Nests in clefts of old 

 stumps or logs, or similar situations, bulky, composed 

 of mosses, etc. Eggs .69 X -51, buffy white or pale 

 buff, speckled, chiefly round larger end, with rusty 

 brown, or cinnamon. Hab. Western United States, 

 north to Sitka ; south, in winter, to western Mexico. 



464. E. difficilis BAIRD. Western Flycatcher. 2 

 e 9 . Under wing-coverts yellowish white, or pale sulphur-yellow. 

 /*. Wing-bands not darker (usually paler) than lower parts. 

 (Length 5.10-5.80.) 



Adult : Above dull olive-green, the wing-bands pale 

 olive-yellowish ; beneath pale dull sulphur-yellow, 

 shaded with olive across breast. Young : Similar, 

 but duller, with wing-bands buffy or ochraceous. 

 Male : Wing 2.55-2.75 (2.64), tail 2.10-2.30 (2.18), 



1 Empidonax alliyularis SCL., Ibis, 1859, 122. Empidonax axillarit RIDGW., in Hist. Am. B. ii. 1874, 363. 

 * Called "Baird's Flycatcher" in the A. 0. U. Check List, but this name belongs properly to E. bairdii 

 SCL. 



