Page:Birds of North and Middle America partV Ridgway.djvu/154

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 * Formicarius rufipectus, Proc. Zool. Soc. Lond., 1866, 73, pi. 8 (Santiago de Verágua, Panamá; coll. Salvin and Godman); 1867, 145 (Santiago de Verágua; habits). — , Cat. Birds Brit. Mus., xv, 1890, 306, part (Verágua, Panamá). — and , Biol. Centr.-Am., Aves, ii, 1892, 235, part (Santiago de Verágua). — , Proc. U. S. Nat. Mus., xvi, 1893, 685 part (Santiago de Verágua; monogr.). — , Proc. Biol. Soc. Wash., xxi, 1908, 157 ([San Antonio], n. w. Colombia). — , Ann. Carnegie Mus., vi, 1910, 625 (Juan Viňas, e. Costa Rica; crit.).
 * F[ormicarius] rufipectus, Proc. Zool. Soc. Lond., 1866, 74.
 * [Formicarius] rufipectus and, Nom. Av. Neotr., 1873, 75. — , Hand-list, iii, 1901, 39, part (Panamá).
 * Formicarius castaneiceps, Ann. Carnegie Mus., iv, April 1, 1908, 301 (Juan Viňas, Costa Rica; coll. Carnegie Mus.).

 Genus HYLOPHYLAX Ridgway.

Small Formicariidæ (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 three-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 antiæ 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 uncinate; maxillary tomium straight or slightly concave, 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. Nostril exposed, more or less widely separated from feathering of latero- frontal antiæ (nearly in contact with the latter in H. nævioides), longitudinally ovate, more or less pointed anteriorly, margined above 