36 BANGS CHIRIQUI BIRDS [ Voi. Ill 



Tvpe, from Boquete, southern slope of Volcan de Chiriqui, 4000 feet alti- 

 tude, $ adult, no. 8539, coll. of E. A. and O. Bangs, collected Feb. 1, 1901, 

 by W. W. Brown, Jr. 



Characters. — Similar to true M. placens (Scl.) of southern Mexico and 

 Guatemala; but greater coverts edged with much lighter green (in true 

 M. placens the greater coverts are not edged with lighter) ; throat less gray, 

 more yellowish; sides of face paler; sides of pileum less grayish ; back decid- 

 edly less ashy. 



Color. — Sides of pileum grayish olive ; a large semi-concealed vertical crest 

 bright yellow ; an indistinct superciliary stripe grayish ; sides of face dull yel- 

 lowish gray, speckled with dusky ; throat pale yellowish gray ; breast much 

 shaded and indistinctly streaked with olive ; belly, sides, and under tail 

 coverts, sulphur yellow ; back olive green, rather more dusky on hind neck, 

 paler and brighter on lower back, rump and upper tail coverts ; wings hair 

 brown, the lesser coverts mostly olive green, secondaries, tertials and greater 

 coverts conspicuously edged with pale yellowish green ; tail dusky olive, edged 

 with olive green ; bend of wing and lining of wing sulphur yellow. 



measurements (in millimeters). 



Remarks. — Costa Rica, Chiriqui and Panama specimens seem 

 all referable to this new subspecies, which is quite different from 

 true M. placens of Mexico and Guatemala. The easiest character 

 to tell it by is the pale edging of the greater wing coverts, which 

 is not shown at all in the Mexican bird. 



Tyranniscus parvus Lawr. 

 Two adults, male and female, Boquete, 4000 feet, January. 



Elaenia pagana subpagana (Scl. and Salv.). 

 One adult female, Boquete, 4000 feet, Jan. 22. 



