736 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Bill nearly as long as head, wedge-shaped in vertical profile, slightly 

 depressed, its depth at anterior end of nostrils about equal to its width 

 at same point; culmen sharply ridged, straight or very faintly convex 

 for most of its length, the terminal portion strongly decurved; gonys 

 slightly convex basally, straight, or nearly so, terminally; maxillary 

 tomium faintly convex anterior to middle portion, its subterminal 

 notch distinct. Nostril longitudinal, narrow, overhung by a broad 

 membranous operculum. Rictal bristles well developed, but not 

 reaching to much beyond nostrils when directed forward. Wing 

 rather long, rounded (seventh and sixth primaries longest, eighth 

 slightly shorter than sixth, ninth shorter than fifth); wing-tip about 

 equal to exposed culmen, slightly more than half as long as tarsus. 

 Tail nearly as long as wing, much rounded, the rectrices rather narrow, 

 with tips subacuminate. Tarsus a little less than one-third as long as 

 wing, its scutella rather distinct; middle toe, with claw, much shorter 

 than tarsus; basal phalanx of middle toe united for most of its length 

 to outer toe, for about half its length to middle toe. 



Coloration. — Forehead and crown black, the latter with a central 

 spot of yellow; rest of upper parts brownish slate color, the tail 

 blackish, with short white tips to rectrices (except middle pair); under 

 parts yellow, the chest and sides light orange-rufous or tawny; supra- 

 loral spot and part of eyelids white; sexes alike. 



jyidip'.cation. — Unknown. 



RaiKje. — Highlands of southern Mexico and Central America. 

 (Monotypic.) 



If this genus is not to be recognized the type species must be 

 referred to Bmileuter\in and not to Mytoborus ( " x.9eto^Aa^fls," part), 

 as has usually been done. It is distinctly more nearly allied to the 

 former. (See remarks under Basileuterus., on p. 740.) 



EUTHLYPIS LACHRYMOSA LACHRYMOSA Cabanis. 

 FAN-TAILED WARBLER. 



Adult male. — Forehead, sides of crown, lores, and anterior portion 

 of suborbital and malar regions black; a white spot on each side of 

 forehead, about halfway between eye and nostril; a white mark on 

 each eyelid; median portion of crown yellow; rest of head and neck 

 (except chin and throat), together with upper parts, plain dull blackish 

 slate-color, sometimes slightly tinged with olive on back; tail slate- 

 blat-k, the rectrices all (except sometimes the middle pair) tipped with 

 white, this broadest on inner webs, and increasing in extent from 

 middle to exterior rectrices (about 10-13 mm. in extent on inner web 

 of outermost rectrix); chin white; throat, breast, and abdomen lemon 

 yellow, the first sometimes tinged with tawny; chest (sometimes throat 

 also) and sides of breast deep gallstone yellow or intermediate between 

 that color and raw sienna; sides and flanks olive; under tail-coverts 



