THAYER AND BANGS: PEARL ISLANDS BIRDS. 151 



TYRANNIDAB. 

 47. Mionectes oleaginus oleaginus (Licht). 



Two specimens, male and female adult, San Miguel Island, February 24 and 

 March 7. Like the first pair from the Pearl Islands, these two skins agree 

 very well with South American examples, and are slightly larger and a little 

 paler in color than M- oleaginus parcus Bangs of Panama. 



48- Myiopagis placens accola Bangs. 



Fifteen adults of both sexes, San Miguel and Saboga Islamls, February, 

 March, and April. These skins agree with specimens from Panama, but are 

 slightly paler in color than the typical series from Chiri(|ui. The back is paler 

 and grayer green, and the throat and breast slightly yellower, less grayish. In 

 these points of difference from accola the islaml bird approaches M. placens 

 pallens Bangs of northern South America (described from Santa Marta). On 

 the whole, however, though somewhat intermediate, Panama and the Pearl 

 Islands specimens should perhaps be referred to accola. 



49. Ornithion pusillum (Cab. and Heine). 



Eighteen specimens, adults of both sexes, and one young ^ in nestling 

 plumage (March 18), San Miguel, Saboga, and Pacheca Islands, March and 

 April. 



This fine series shows that the bird of the Pearl Islands does not differ from 

 that of Panama. At the present time, however, we are not prepared to say 

 that the Panama form is true 0. pimllum which was described from Cartagena. 

 The rather scanty and poor material examined from Colombia points to the 

 two being subspecifically distinct, in which case the Panama race should bear 

 the name, Ornithion pusillMm flaviventre (Scl. and Salv.). The one nestling 

 differs from the adults in having the cap less sharply defined and more nearly 

 concolorous with the back, all the colors more blended, and the wing bars 

 rufous instead of whitish or yellowish. 



50. Elainea pagana subpagana (Scl. and vSalv.). 



Twenty-three adults, both sexes, San Miguel and Saboga Islands, February, 

 March, and April. 



There appear to be no constant differences between the island skins and 

 those from the mainland of Panama and Chiriqui. The olive green of the back 

 varies much in this series, and some specimens are very pale ; others in which 

 the plumage has become faded are very brown. In measurements the series 

 varies a good deal, but this is also true of mainland specimens. 



