146 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



1870, 196 (Chitra and Calov^vora, Panama).— Frantzius, Joum. fiir Orn., 



1869, 306 (Costa Rica).— Ridgway, Proc. U. S. Nat. Mus., vi, 1883, 415 



(Navarro, Costa Rica). 

 Grallariada Jlavirostris costaricensis Carriker, Ann. Carnegie Mus., ^d, 1910, 630 



(Cariblanco de Sarapiqui and base of Volcdn de Turrialba, 2,000 ft., Costa 



Rica). 

 [Grallaricula] flavirostris (not Grallaria fiavirostris Sclater, 1858) Sclater and 



Salvin, Nom. Av. Neotr., 1873, 76, part (Costa Rica; Verdgua).— Sharpe, 



Hand-list, iii, 1901, 44, part (Costa Rica; Panami). 

 Grallaricula fiavirostris Sclater, Cat. Birds Brit. Mus., xv, 1890, 326, part (Buena 



Vista, Costa Rica; Calov^vora and Cordillera de Tole, Panama). — Salvin 



and GoDMAN, Biol. Centr.-Am., Aves, ii, 1892, 245, part (Barranca, Buena 



Vista, and Rio Sucio, Costa Rica; Chitra, Cordillera de Tole, Calov^vora, 



and Calobre, Panami). 

 (?) Grallaricula vegeta Bangs,^ Proc. New Engl. Zool. Club, iii, Jan. 30, 1902, 42 



(Caribbean slope of Volcdn de Chiriqui, 4,000 ft., Panama; coll. E. A. and 



O. Bangs). 



Genus GRALLARIA Vieillot. 



Grallaria Vieillot, Analyse, 1816, 43. (Type, Roi des Fourmilliers Buffon=i^or- 



micarius varius Boddaert.) 

 Myioturdus Boie, Isis, 1826, 972. (Type, Formicarius varius Boddaert.) 

 Myiotrichas Boie, Isis, 1831, 542. (Type, Formicarius varius Boddaert.) 

 Colobathrisb Gloger, Hand- und Hilfsb. der Naturg., 1842, 304. (New name 



for " Grallina" =Grallaria Vieillot.) 

 Chamaebates c Bertoni, Aves Nuevas del Paraguay, 1901, 150. (Type, C. rufiven- 



tris Bertom= Myiothera grallaria Lichtenstein.) 



Very large terrestrial Formicariidge (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 antise 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 subtermmally ; 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 distmct but very slender; 



o I am not satisfied as to the distinctness of G. vegeta. The individual variation 

 among Costa Rican specimens (of which, however, I have seen but few) is considerable, 

 and I strongly suspect that a larger series of specimens would show the Viirds from 

 western Panamd to be inseparable. 



bSee also Colobaihris Cabinis, Wiegmann's Archiv, 1847. i, 216. 



c Xafiai, on the ground ; /JAttj^, one who treads or covers. (Bertoni.) 



