758 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Costa Rica (Anji^ostnra; Rio Frio; Tiu'urriqno; Jiiiz; Volcan de 

 Miravalle.s; La Falma; San Carlos), Nicaragua (Greytown; Los 

 Sabolos), and southern Honduras (Segovia River). 



Basileuterus uropygialis (not of Sclater) Lawrence, Ann. Lye. N. Y., viii, 1866, 

 180 (Greytown, Nicaragua) ; ix, 1868, 95 (Angostura and Juiz, Costa Rica). — 

 Salvin, Ibis, 1872, 313 (Nicaragua). — Boucard, Proc. Zool. Soc. Lond., 1878, 

 52 (San Carlos, Costa Rica). 



Basikutcrm Icncopi/gius Sclater and Salvin, Nom. Av. Neotr., 1873, 156 (Costa 

 Rica; coll. P. L. Sclater). — Salvin and Godman, Biol. Centr.-Am., Aves, i, 

 1881, 172, part (Greytown, Nicaragua; Tucurrique, Angostura, and Juiz, 

 Costa Rica).— Nutting, Proc. U. S. Nat. Mus., vi, 1884, 399 (Los Sabalos, 

 Nicaragua; habits). — Sharfe, Cat. Birds Brit. Mus., x, 1885, 402. — Zeledon, 

 Proc. U. S. Nat. Mus., viii, 1885, 105 (Costa Rica); Anal. Mus. Nac. Costa 

 Rica, i, 1887, 107 (Angostura and Juiz, Costa Rica).— Richmond, Proc. 

 U. S. Nat. Mus., xvi, 1893, 485 (Rio Frio, Costa Rica; habits; song).— 

 Underwood, Ibis, 1896, 434 (Volcan de Miravalles, Costa Rica). 



^Basileuterus] leucopyr/ius Sclater and Salvin, Nom. Av. Neotr., 1873, 10. 



Basileuterus semicerrdnus leucoj^i/gius Rid{;way [and Nutting], Proc. U. S. Nat. 

 Mus., V, Sept. 5, 1882, 390 (La Palma, Costa Rica; haljits). 



Genus ERGATICUS Baird. 



Ergatims Baird, Review Am. Birds, Apr., 1865, 237, 264. (Type, Setopluiga 

 rubra Swainson. ) 



Small ''fly-catching'' Mniotiltid;e with the bill very small and nar- 

 row (narrower than deep at gonydeal angle and w^ith maxilla from 

 nostril not longer than hallux, without claw); ninth primary shorter 

 than fourth; color mostly red. 



Bill very small (length of maxilla from nostril not more than length 

 of hallux without claw), narrow (width at gonydeal angle decidedly 

 less than depth at same point); culmen nearly straight for ])asal half 

 or more, then gently decurved; maxillary 'omiuni nearly straight for 

 terminal half, the basal half gently deflexed to the rictus, the sub- 

 terminal notch indistinct; gonys straigiit or very faintly convex. 

 Nostril longitudinal, narrowdy oval, elli})tical, or nearly linear, over- 

 hung by broad membranous operculum. Rictal ])ristles well devel- 

 oped, more than half as long as bill. \Ving rather long, I'oundcd 

 (seventh, sixth, and fifth primaries longest, eighth longer than fourth, 

 ninth shorter than third); wing-tip longer than commissure, but nuu'h 

 shorter than tarsus. Tail .nearly as long as wing, rounded, the rec- 

 trices rather narrow, with rounded tips. Tarsus a little less than one- 

 third as long as wing, slender, its scutella distinct or obvious only on 

 lower portion; 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 (or a little less) to inner toe. 



Coloration. — Prevailing color red (sexes alike). 



Nidijication. — U n known . 



Range. — Highlands of Mexico and (iuateniida. (Two species.) 



