188 Proceedings of the Biological Society of Washington. 



constantly and sufficiently from western Colombia skins to necessitate 

 their separation under the above name. Both von Berlepsch and more 

 recently Dr. Hartert have noted the peculiarities of specimens from this 

 region, remarking that they resemble Central American birds {assimilis), 

 which is correct. 

 Specimens examined. — Ecuador: Bucay, Guayas, 3. 



Pipromorpha assimilis dyscola (Bangs). 



Mionectes oleagineus (not Muscicapa oleaginea Lichtenstein) Salvin, 

 Proc. Zool. Soc. London, 1867, 147 (Santa F^, Veragua). — Lawrence, 

 Ann. Lye. Nat. Hist. N. Y., IX, 1868, 89 (Veragua; range), 111 (Costa 

 Rica, fide Salvin). — Salvin, Ibis, 1869, 315, in text, 318 (Costa Rica; 

 crit.). — VON Frantzius, Journ. f. Orn., XVII, 1869, 307, part (Costa 

 Rica). — Salvin, Proc. Zool. Soc. London, 1870, 196 (Calovevora, 

 Boquete de Chitra, and Bugaba, Veragua). — Sclater and Salvin, Nom. 

 Avium Neotrop., 1873, 47, part (range). — Boucard, Proc. Zool. Soc. 

 London, 1878, 63 (San Mateo, Costa Rica). — Zeledon, Cat. Aves Costa 

 Rica, 1882, 14 (Costa Rica). — Salvin and Godman, Biol. Centr.-Am., 

 Aves, II, 1888, 22, part and I, 1904, xxii, part (Costa Rican [part] and 

 Panama [part] references and localities; crit.). — Underwood, Ibis, 1896, 

 438 (Volcano Miravalles, Costa Rica). — Underwood, Avifauna Costar- 

 riquena, 1899, 7, part (Costa Rica). 



Mionectes assimilis (not of Sclater) Lawrence, Ann. Lye. Nat. Hist. N. Y., 

 IX, 1868, 111 (Angostura, Guiatil, and "Payua" [Pacuare], Costa Rica). 

 — VON Frantzius, Journ. f. Orn., XVII, 1869, 307, part (Costa Rica). — 

 Zeledon, Cat. Aves Costa-Rica, 1882, 14, part (Costa Rica). — Zeledon, 

 Proc. U. S. Nat. Mus., VIII, 1885, 108, part (Costa Rica).— Zeledon, 

 An. Mus. Nac. Costa Rica, I, 1887, 116 (Pozo Azul de Pirris, Las Trojas, 

 and Monte Redondo, Costa Rica). — Cherrie, Expl. Zool. en Costa 

 Rica, 1891-2, 1893, 31 (Palmar, Lagarto, Boruca, and Terraba, Costa 

 Rica). — Sharpe, Hand-List Birds, III, 1901, 114, part (range). 



[Mionectes oleagineus] a. Subsp. assimilis Sclater, Cat. Birds Brit. Mus., 

 XIV, 1888, 113, part (Costa Rican [part] and Veraguan localities and 

 references). 



Mionectes oleaginosus (lapsus) Cherrie, Expl. Zool. Rio Naranjo, 1893, 15 

 (Pozo del Pital, Costa Rica; nesting). 



Mionectes assimilis dyscolus Bangs, Auk, XVIII, 1901, 362 (Divala, 

 Panama; orig. descr.; type now in coll. Mus. Comp. Zool.; crit.). — von 

 Berlepsch, Ornis, XIV, 1907, 493 (ref. orig. descr.). 



Pipromorpha assimilis dyscola Ridgway, Bull. U. S. Nat. Mus., No. 50, IV, 

 1907, 453 (diag.), 455, part (diag.; range; references; meas.; excl. locali- 

 ties in Nicaragua and eastern Costa Rica). — Bangs, Auk, XXIV, 1907, 

 300 (Boruca, Paso Real, Pozo del Rio Grande, and Barranca, Costa 

 Rica).— Bangs, Proc. Biol. Soc. Washington, XXII, 1909, 33 (Boruca, 

 Pozo Azul, and Buenos Aires, Costa Rica; crit.). — Carriker, Ann. 

 Carnegie Mus., VI, 1910, 712 (Costa Rican localities and references; 

 habits; crit.). 



