Adult male. — Length (skins), 175-179 (177); wing, 99.5-115 (105.1); tail, 31.5-34 (33); culmen, 29-31 (30); tarsus, 50-51.5 (50.7); middle toe, 28.5-31 (30.2).[1]
Adult female. — Length (skins), 166-181 (172); wing, 97.5-100.5 (98.7); tail, 33.5-36 (34.3); culmen, 27-30 (28.5); tarsus, 46-52 (48); middle toe, 29-31 (30).[1]
Eastern Costa Rica (Rio Súcio; Rio Sícsola; Jiménez; Carrillo).
- Pittasoma michleri zeledoni Ridgway, Proc. U. S. Nat. Mus., vi, Apr. 11, 1884, 414 (Rio Súcio, Costa Rica; coll. U. S. Nat.Mus.). — Zeledón, Anal. Mus., Costa Rica, i, 1887, 115 (Jiménez, Costa Rica). — Carriker, Ann. Carnegie Mils., i, 1910, 626 (Caribbean foothills of Costa Rica, to about 2,500 ft.; habits).
- Pittasoma zeledoni Sclater, Cat. Birds Brit. Mus., xv, 1890, 310. — Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1892, 238.
- [Pittasoma] zeledoni Sharpe, Hand-list, iii, 1901, 40.
Genus GRALLARICULA Sclater.
- Grallaricula Sclater, Proc. Zool. Soc. Lond., 1858, 283. (Type, Grallaria flavirostris Sclater.)
Small Formicariidæ (length about 90-115 mm.) with very short, emarginate tail (only about one-third as long as wing), short and broad but rather thick bill, long and conspicuous rictal bristles, rather long, slender tarsi (about one-third as long as wing), the color plain brown or olive above, whitish or tawny below, usually more or less streaked or squamated with black or dusky — sometimes plain gray, with head and neck chestnut.
Bill much shorter than head, rather stout, broadly wedge-shaped in vertical profile, its width at loral antiæ decidedly greater than its depth at same point and equal to about three-fifths the distance from nostril to tip of maxilla; culmen distinctly ridged, gradually and rather strongly decurved from near base, the tip of maxilla distinctly but rather minutely uncinate ; maxillary tomium slightly concave, distinctly but minutely notched subterminally; mandibular tomium faintly convex (at least distally), faintly notched subterminally; gonys faintly or gently convex, not prominent basally. Nostril partly exposed, partly hidden by antrorse feathering of loral antiæ, small, longitudinal, narrowly oval or elliptical, overhung by a rather broad extension of the membraneous integument of the nasal fossæ. Rictal bristles conspicuously developed, nearly (sometimes quite) as long as bill, the feathers of chin, malar antiæ, and loral region with distinct terminal setæ. Wing rather long, with longest primaries much longer than secondaries; sixth and seventh primaries longest, the tenth (outermost) two-thirds as long as longest, or slightly more, the ninth decidedly longer than secondaries. Tail about one-third as long as
