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146 1870, 196 (Chitra and Calovévora, Panamá). —, Journ. für Orn., 1869, 306 (Costa Rica). —, Proc. U. S. Nat. Mus., vi, 1883, 415 (Navarro, Costa Rica).
 * Grallaricula flavirostris costaricensis, Ann. Carnegie Mus., vi, 1910, 630 (Cariblanco de Sarapiquí and base of Volcán de Turrialba, 2,000 ft., Costa Rica).
 * [Grallaricula] flavirostris (not Grallaria flavirostris Sclater, 1858) and, Nom. Av. Neotr., 1873, 76, part (Costa Rica; Verágua). — , Hand-list, iii, 1901, 44, part (Costa Rica; Panamá).
 * Grallaricula flavirostris, Cat. Birds Brit. Mus., xv, 1890, 326, part (Buena Vista, Costa Rica; Calovévora and Cordillera de Tolé, Panamá). — and , Biol. Centr.-Am., Aves, ii, 1892, 245, part (Barranca, Buena Vista, and Rio Súcio, Costa Rica; Chitra, Cordillera de Tolé, Calovévora, and Calobre, Panamá).
 * (?) Grallaricula vegeta, Proc. New Engl. Zool. Club, iii, Jan. 30, 1902, 42 (Caribbean slope of Volcán de Chiriquí, 4,000 ft., Panamá; coll. E. A. and 0. Bangs).

 Genus GRALLARIA Vieillot.


 * Grallaria, Analyse, 1816, 43. (Type, Roi des Fourmilliers Buffon = Formicarius varius Boddaert.)
 * Myioturdus, Isis, 1826, 972. (Type, Formicarius varius Boddaert.)
 * Myiotrichas, Isis, 1831, 542. (Type, Formicarius varius Boddaert.)
 * Colobathris, Hand- und Hilfsb. der Natürg., 1842, 304. (New name for "Grallina" = Grallaria Vieillot.)
 * Chamæbates, Aves Nuevas del Paraguay, 1901, 150. (Type, C. rufiventris Bertoni = Myiothera grallaria Lichtenstein.)

Very large terrestrial Formicariidæ (length about 160-210 mm.) with the slender tarsus less than half as long as wing, tail less than half (usually only two-fifths) as long as wing, and plumage of upper parts more or less distinctly squamated with dusky.

Bill shorter than head, stout, much deeper than broad at base, its width at loral antiæ decidedly less than its height at same point and equal to a little to considerably less than half the distance from nostril to tip of maxilla; culmen very indistinctly if at all ridged, gradually but rather strongly curved from base, the tip of maxilla distinctly but not abruptly uncinate; maxillary tomium very slightly concave, distinctly notched subterminally; mandibular tomium nearly straight or very faintly convex, with faint subterminal notch; gonys slightly to very faintly convex, very ascending terminally, not prominent basally. Nostril exposed, posteriorly in contact with loral feathering, obliquely broadly oval, with an internal tubercle or septum showing within upper posterior portion. Rictal bristles distinct but very slender; 