454 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



cc. Chin and upper lliroaL olive, like chest, passing into deeper ocher-yellowish 



on under i)arts of body; middle and greater wing-coverts distinctly tipped 



with liuff or ochraceous; upper tail-coverts ocher-yellowish, different from 



olive-green of ])ack; ])ill and feet relatively smaller. (Pipromorpha oleaginea.) 



d. AV)Ove dull(>r and darker olive-green, with upper tail-coverts slightly more 



ochraceous; under parts of body more ochraceous. (Brazil to Cayenne, 



«• Venezuela, and eastern Peru. ) 



Pipromorpha oleaginea oleaginea (extralimital). « 

 dd. Aliove lighter and brighter olive-green, willi ni)i)er tiiil-coverts strongly 

 ochraceous, in distinct contrast; under parts more yellowish. (Panama 

 and Santa Marta district of Colombia.) 



Pipromorpha oleaginea parca (p. 457) 

 hb. Pileum and liindneck dull slate-gray tinged witli olive, abruptly (but not con- 

 spicuously) different from olive-green of back ; under parts of body ochraceous- 

 buff, this rather abruptly defined against olive and gray of chest and throat. 

 (Southern Brazil and northern Argentina. ) 



Pipromorpha rufiventris (extralimital).b 



aa. Back (together willi pileum and hindneck) clear slale-gray, in conspicuous and 



abrupt contrast with olive-green of rumj) and ujiper tail-covcrls. (Costa Rica.) 



Pipromorpha semischistacea (p. 458) 



PIPROMORPHA ASSIMILIS ASSIMILIS (Sclaterj. 



MEXICAN PIPROMORPHA. 



Adults (sexes alike). — Above plain greenish olive, darker and duller 

 (less greenish) on pileum and hindneck; wings and tail dark grayish 

 brown or dusky olive with olive-green edgings, the inner secondaries 

 (tertials) margined terminally with bufTy; sides of head, chin, and 

 tliroat (hdl gray, tinged with olive, passing into more decided olive 

 htie on chest; under parts of body light buffy oclire yellow or dull 

 ochraceous maize, yellow, tinged or obsoletely streaked on breast. 



a M[iiscicapd] oleaginea Lichtenstein, Verz. Doubl., 1823, 55 (Bahia, e. Brazil; 

 coll. Berlin Mus.). — Mionectes oleagineus Cabanis, in Tschudi's Fauna Peruana, Aves, 

 1845, 148, footnote (Brazil; Cayenne); Burmeister, Syst. Ueb. Th. Bras., ii, 1856, 

 482; Sclater, Cat. Am. Birds, 1862, 213, part (in syncmymy); Cat. Birds Brit. Mus., 

 xiv, 1888, 112, part (Para, Guia, Borba, and Bahia, Brazil). — P[ipromorpha~\ oleaginea 

 Cabanis and Heine, Mus. Hein., ii, 1859, 55 (Peru; Surinam; Cayenne). — Elainea 

 oleaginea Hartlaub, Verz. Mus. Brem., 1844, 52. — Musdcapara oleaginea D'Orbigny, 

 Voy. Amer. Merid., Ois., 1839, 323. — M[uscica2M] chloronotus D'Orbigny and Lafres- 

 naye, Mag. de Zool., 1837 (Synopsis Avium, p. 51) (Yuracares, Bolivia; ex M. chlo- 

 ronotis Lesson, Traite d'Orn., 1831, 392=nomen nudum!). — [Mionectes oleagineus] 

 b. Subsp. typica Sclater, Cat. Birds Brit. Mus., xiv, 1888, 113, part. 



Specimens from Venezuela, Trinidad, and Tobago have the throat more distinctly 

 and more extensively olivaceous, besides presenting oth er differences, and probably 

 should be separated subspecifically from those of eastern Brazil. An example from 

 Pebas, eastern Peru, on the other hand, seems to l)e indistinguishable from Bahia 

 specimens. 



b Mionectes rufiventris Cabanis, in Tschudi's Fauna Peruana, Aves, 1845, 148, foot- 

 note (Brazil; coll. Berlin Mus.; ex Muscicapa rufiventris Lichtenstein, manuscript); 

 Burmeister, Syst. Uel). Th. Bras., ii, 1856, 482; Sclater, Cat. Birds Brit. Mus., xiv, 

 1888, 114. — Hemitriccus barbarense Bertoni, Aves Nueves Parag., 1901, 124. 



