114 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Myrmeciza occidentalis CuErrim, Anal. Inst. Fis.-Geog. Costa Rica, vi, 1893, 19 
(Pozo del Pitdl, s. w. Costa Rica).—Carrixer, Ann. Carnegie Mus., vi, 
1910, 616 (Pacific lowlands and foothills, Costa Rica; crit.; descr. nest and 
eggs). 
Myrmelastes occidentalis Sauvin and Gopman, Biol. Centr.-Am., Aves, ii, 1892, 
228 (Bebedero, etc., w. Costa Rica).—CuErris, Expl. Zool. Merid. Costa 
Rica, 1898, 43 (Palm4r, Lagarto, Boruca, and Buenos Aires, s. w. Costa 
Rica).—Carriker, Ann. Carnegie Mus., v, 1908, 10 (crit.). 
[Myrmelastes] occidentalis Suarre, Hand-list, iii, 1901, 32. 
Myrmelastes exsul occidentalis Hettmayr, Novit. Zool., xiii, 1906, 341 (Pozo 
Azul, etc., s. w. Costa Rica; Bugaba, Panamé; crit.)—Banes, Auk, xxiv, 
1907, 296 (Boruca, Paso Rel, Pozo del Rio Grande, and Barranca, s. w. 
Costa Rica).—CarrikeR, Ann. Carnegie Mus., v, 1908, 10, in text. 
M[yrmelastes] exsul occidentalis Ripaway, Proc. Biol. Soc. Wash., xxi, 1908, 
194, in text. 
Myrmelastes intermedius (not Myrmeciza intermedia Cherrie) Satvin and Gopman, 
Biol. Centr.-Am., Aves, ii, 1892, 227, part (San Carlos and San Mateo, Costa 
Rica; Bugaba, Panamé). 
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 alule; 
bill and feet black; iris chestnut; bare skin of lores and orbits blue, 
becoming white behind eye; 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).? 
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, 
32-85 (33.6); middle toe, 20-22 (21.1).° 
Costa Rica (Naranjo de Cartago; Guayabo; Guapiles; Carrillo; La 
Hondura; Tucurriqui; Cariblanco de Sarapiqui) and western Panama 
(Boquete de Chitra; Calobre; Calovévora; Caribbean slope, Volcan 
de Chiriqui). Western Colombia. 
Thamnophilus immaculatus (not of Lafresnaye) Sarvin, Ibis, 1870, 114 (Tucur- 
riqui, Costa Rica; ciit.); Proc. Zool. Soc. Lond., 1870, 194 (Volcan de Chiri- 
qui, Calovévora, and Calobre, Panam4).—SciaTeER, Cat. Birds Brit. Mus., xv, 
1890, 189, part (Tuc. riqui, Costa Rica; Boquete de Chitra, Calobre, Calové- 
vora, and Volcan de Chiriquf, Panam4). 
@ Zeledén, manuscript. 
b Five specimens, from Costa Rica. 
¢ Eight specimens from Costa Rica (7) and western Panamé (1). 
