BIRDS OP NORTH AND MIDDLE AMERICA. 



59 



exposed culmen, 13-13.2 (13); depth of bill at base, 6.1-7.1 (6.6), 

 tarsus, 19.8-22.1 (21.1); middle toe, 14.7-17.5 (16.5).^ 



You^igf {i7i first plumage). — Plain, rather light, olive, slightly paler, 

 and decidedly tinged with yellow on under parts; remiges, primary 

 coverts, and tail brownish black or sooty, the former indistinctly light 

 olive basally. 



The series of specimens examined is much too imperfect to enable me 

 to define very accurately the geographic range of this form. Indeed, 

 lam doubtful whether the bird from Colombia and Costa Rica is really 

 the true T. palmarum melanoptera, the type locality of which is eastern 

 Peru. The National Museum possesses two specimens from that coun- 

 try (headwaters of the Rio Huallaga). These have the wing and tail 

 decidedly longer than any specimen seen from other localities. In 

 coloration they agree closely with some specimens from the Lower 

 Amazon (Diamantina), both having the back darker and the general 

 violet gloss stronger than in any examples from Colombia and Costa 

 Rica with which I have been able to compare them. 



One perplexing circumstance is the occurrence in the same locality 

 i« the Lower Amazon district of specimens representing, as to colora- 

 tion at least, both the typical T. p. palma/rum and T. p. mdanoptera. 



Eastern Nicaragua (Grey town) and Costa Rica (Tucurriqui; Naranjo; 

 San Jos6, Santa Rosa; Angostura; Turrialba) southward through 

 Colombia, Ecuador, Venezuela, etc. , to eastern Peru, Bolivia, Amazon 

 Valley, and Trinidad. 



Tanagra olivascens (not of Lichtenstein, 1823) D'Orbigny, Voy. Amer. M^rid., 

 Ois., 1839, 274.— TscHUDi, Fauna Peruana, Aves, 1847, 204.— (?) Leotaud, 

 Ois. Trinidad, 1866, 295. 



^ Eleven specimens. 

 ■ Specimens from different localities average as follows: 



