126 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Formicarius rufipectus "■ Salvin, Proc. Zool. Soc. Lond., 1866, 73, pi. 8 (San- 

 tiago de Verdgua, Panama; coll. Salvin and Godnian); 1867, 145 (Santiago de 

 Veragua; habits). — Sclater, Cat. Birds Brit. Mus., xv, 1890, 306, part (Vera- 

 gua, Panama). — Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1892, 235, 

 part (Santiago de Veragua): — Ridgway, Proc. U. S. Nat. Mus., xvi, 1893, 685 

 part (Santiago de Venlgua; monogr.). — Bangs, Proc. Biol. Soc. Wash., xxi, 

 1908, 157 ([San Antonio], n. w. Colombia).- — Carriker, Ann. Carnegie Mus., 

 vi, 1910, 625 (Juan Viiias, e. Costa Rica; crit.). 



Flormicarius] rufipectus Salvin, Proc. Zool. Soc. Lond., 1866, 74. 



[Formicarius] rufipectus Sclater and Salvin, Nom. Av. Neotr., 1873, 75. — 

 Sharpe, Hand-list, iii, 1901, 39, part (Panama). 



Formicarius castaneiceps Carriker, Ann. Carnegie Mus., iv, AjDril 1, 1908, 301 

 (Juan Viiias, Costa Rica; coll. Carnegie Mus.). 



Genus HYLOPHYLAX Ridgway. 



Hylophylaxb Ridgway, Proc. Biol. Soc. Wash., xxii, Apr. 17, 1909, 70. (Type, 

 Conopophaga nsevioides Lafresnaye.) 



Small Formicariidae (length about 100 mm.) with second phalanx 

 of middle toe partly united to outer toe, outstretched feet reaching to 

 beyond tip of tail, tail not more than tlu-ee-fifths as long as wing, 

 planta tarsi fused (nonscutellate) and acrotarsium indistinctly 

 scutellate. 



Bill shorter than head (sometimes nearly as long), rather stout, 

 rather broad and depressed basally, with straight or (in part) even 

 slightly convex lateral outlines, its width at frontal antise much 

 greater (sometimes twice as great) as its height at same point and 

 equal to from a little less than half to a little more than two-thirds 

 the distance from nostril to tip of maxilla; culmen distinctly ridged, 

 nearly straight basally (sometimes for most of its length), gradually 

 to rather abruptly decurved terminally, the tip of maxilla slightly 

 but distinctly uncmate; maxillary tomium straight or slightly con- 

 cave, minutely but distinctly notched subterminally; mandibular 

 tomium straight or faintly convex, minutely notched subterminally, 

 the tip of mandible forming a short, more or less recurved, point; 

 gonys more or less strongly convex and prominent basally, more 

 gently convex and more or less decidedly ascending terminally. Nos- 

 tril exposed, more or less widel}^ separated from feathering of latero- 

 frontal antiae (nearly in contact with the latter in H. nsevioides), 

 longitudinally ovate, more or less pointed anteriorly, margined above 



o The following citations of F. rufipectus refer to a different form: 



Formicarius rufipectus (not of Salvin) Sclater, Cat. Birds Brit. Mus., xv, 1890, 

 306, part(Baisa, w. Ecuad6r). — Salvin and Godman, Biol. Centr.-Am., Aves, 

 ii, 1892, 235 (Baisa, w. Ecuador). — Salvadori and Festa, Boll. Mus, Zool., 

 etc., Torino, xv, 1899, no. 362, 33 (Gualea, w. Ecuad6r). — Menegaux and 

 Hellmayr, Bull. Soc. Philom., 1906, 52 (Esmeraldas, Pachijdl, and Oyacachi, 

 w. Ecuad6r; crit.). 



b"TXr), a wood, forest; ^6Xa^, a watcher, guard, sentinel. 



