- Myrmeciza occidentalis Cherrie, Anal. Inst. Fis.-Geog. Costa Rica, vi, 1893, 19 (Pozo del Pitál, s. w. Costa Rica). — Carriker, Ann. Carnegie Mus., vi, 1910, 616 (Pacific lowlands and foothills, Costa Rica; crit.; descr. nest and eggs).
- Myrmelastes occidentalis Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1892, 228 (Bebedero, etc., w. Costa Rica). — Cherrie, Expl. Zool. Mend. Costa Rica, 1893, 43 (Palmár, Lagarto, Boruca, and Buenos Aires, s. w. Costa Rica). — Carriker, Ann. Carnegie Mus., v, 1908, 10 (crit.).
- [Myrmelastes] occidentalis Sharpe, Hand-list, iii, 1901, 32.
- Myrmelastes exsul occidentalis Hellmayr, Novit. Zool., xiii, 1906, 341 (Pozo Azúl, etc., s. w. Costa Rica; Bugaba, Panamá; crit.). — Bangs, Auk, xxiv, 1907, 296 (Boruca, Paso Reál, Pozo del Rio Grande, and Barranca, s. w. Costa Rica). — Carriker, Ann. Carnegie Mus., v, 1908, 10, in text.
- M[yrmelastes] exsul occidentalis Ridgway, Proc. Biol. Soc. Wash., xxi, 1908, 194, in text.
- Myrmelastes intermedius (not Myrmeciza intermedia Cherrie) Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1892, 227, part (San Carlos and San Mateo, Costa Rica; Bugaba, Panamá).
MYRMECIZA ZELEDONI Ridgway.
ZELEDON'S ANTBIRD.
Adult male. — Uniform black, relieved only by a white patch on inner-anterior portion of lesser wing-covert area, a narrow white margin thence around bend of wing, and white edging to alulæ; bill and feet black; iris chestnut; bare skin of lores and orbits blue, becoming white behind eye;[1] length (skins), 168-188 (178); wing, 78-86 (80.9); tail, 70-82 (76.8); culmen, 21-23 (22); tarsus, 33.5- 34.5 (34); middle toe, 20-22 (21.2).[2]
Adult female. — Above plain dark chocolate brown (or between chocolate and seal brown), the tail blackish brown or brownish black; loral, orbital, and auricular regions, chin, and upper throat, blackish brown or brownish black; under parts lighter chocolate brown or vandyke brown; maxilla blackish brown, mandible pale yellowish brown or dull yellowish (in dried skins); legs and feet dusky brown (in dried skins); length (skins), 166-193 (175); wing, 75-81 (78.6); tail, 71.5-78 (75); culmen, 20.5-22 (21.1); tarsus, 32-35 (33.6); middle toe, 20-22 (21.1).[3]
Costa Rica (Naranjo de Cartago; Guayabo; Guápiles; Carrillo; La Hondura; Tucurríqui; Cariblanco de Sarapiquí) and western Panamá (Boquete de Chitra; Calobre; Calovévora; Caribbean slope, Volcan de Chiriquí). Western Colombia.
- Thamnophilus immaculatus (not of Lafresnaye) Salvin, Ibis, 1870, 114 (Tucurríqui, Costa Rica; cnt.); Proc. Zool. Soc. Lond., 1870, 194 (Volcan de Chiriquí, Calovévora, and Calobre, Panamá). — Sclater, Cat. Birds Brit. Mus., xv, 1890, 189, part (Tucurríqui, Costa Rica; Boquete de Chitra, Calobre, Calovévora, and Volcan de Chiriquí, Panamá).
