Young. — Pileum and hindneck dull slate color, with narrow mesial guttate streaks of buff; chest and breast similar but ground color rather lighter brownish slate and streaks broader; otherwise like adults, but middle and greater wing-coverts with distinct (though not sharply defined) terminal or subterminal spots of tawny, and with a very narrow terminal margin of black.
Adult male. — (No specimens with sex determined examined.) Adult female. — Length (skins), 163-175 (169); wing, 114-116.5 (115.3); tail, 42-44 (43); culmen, 25.5-26 (25.7); tarsus, 46-50.5 (48.3); middle toe, 24-25.5 (24.3).[1]
Southern Mexico, in State of Chiapas (Tumbalá), Guatemala (forests of northern Vera Paz; Cobán; Choctúm; Calderas; Yaxcamnál; Savana Grande; Barranca Honda and Pajál Grande, Volcán de Fuego), Honduras (Santa Ana), and northern Nicaragua (Mata- galpa).
- Grallaria guatimalensis Prévost and Des Murs, Zool. Voy. 'Venus,' Atlas, "1846" = 1842, pl. 4 (Guatemala). — Lafresnaye, Rev. Zool., 1842, 334. — {[sc|Sclater}}, Proc. Zool. Soc. Lond., 1858, 280 (monogr.).
- Grallaria guatemalensis Prévost and Des Murs, Zool. Voy. 'Venus,' "1855" = 1849, 199. — Sclater and Salvin, Ibis, 1859, 119 (Cobán, Guatemala). — Salvin, Ibis, 1861, 354, in text (Vera Paz, Guatemala). — Sclater, Cat. Am. Birds, 1862, 191 (Guatemala); Cat. Birds Brit. Mus., xv, 1890, 313 (Choctúm, Yaxcamnál, Savana Grande, Calderas, Volcán de Fuego, Barranca Honda, Volcán de Fuego, and Pajál Grande, Volcán de Fuego). — Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1892, 240 (localities in Guatemala; Santa Ana, Honduras; Matagalpa, Nicaragua).
- [Grallaria] guatemalensis Sclater and Salvin, Nom. Av. Neotr., 1873, 75. — Sharpe, Hand-list, iii, 1901, 41 (Guatemala to Nicaragua).
- (?) Grallaria guatemalensis ? Ridgway, Proc. U. S. Nat. Mus., xiv, 1891, 470 (Santa Ana, Honduras; descr. young).
- [Chamaeza] guatimalensis {[sc|Bonaparte}}, Consp. Av., i, 1850, 204.
- Grallaria princeps (not of Sclater and Salvin) {[sc|Boucard}}, Ann. Soc. Linn. Lyon, 1878, 39 (Guatemala).
GRALLARIA GUATIMALENSIS PRINCEPS (Sclater and Salvin).
COSTA RICAN ANTPITTA.
Similar to G. g. guatimalensis but smaller and more deeply colored, the black squamations of upper parts broader, the general color of under parts bright tawny to rufous-tawny.[2]
