396 



BIRDS OF THE REPUBLIC OF PANAMA PART 4 



rich yellow; hindcrown, sides of head, throat, and upper breast, and 

 rest of upper surface, including wing coverts, glossy dark blue, slightly 

 more purple on head, nape, and throat; remiges and rectrices blackish, 

 edged dark blue; basal third of secondaries and inner primaries white 

 on inner web; outer pair of tail feathers with white patch on inner 

 web; rest of undersurface rich yellow; underwing coverts white. 



Adult female, forecrown dark orange-yellow T , becoming yellowish 

 green on midcrown; hindcrown and nape dark gray; rest of upper sur- 

 face yellowish green; wings and tail dusky, with all feathers edged yel- 

 lowish green; sides of head, chin, and sides of undersurface yellowish 

 green; throat and breast gray, becoming pinkish buff on belly, bend of 

 wing light yellow; underwing coverts white. 



Juvenile, entirely gray, lighter on undersurface; remiges and rec- 

 trices edged yellowish green; a few yellowish green feathers on back. 



Measurements. — Males (10 from Darien and Colombia), wing 59.0- 

 69.0 (63.9), tail 26.7-45.8 (36.4), oilmen from base 9.0-11.1 (9.9), 

 tarsus 15.1-16.9 (16.2) mm. 



Females (7 from Colombia), wing 59.3-62.3 (61.1), tail 33.7-38.6 

 (36.2), oilmen from base 10.2-11.6 (10.6), tarsus 14.6-16.9 (16.3) 

 mm. 



Resident. Known in Panama only from a few localities in the foot- 

 hills of eastern Darien. It appears to be rare, but recorded sparsely 

 from a wide elevational range. E. A. Goldman collected it in 1912 on 

 Cerro Pirre between 1500 and 1560 m near the head of the Rio Limon 

 and 14.4 km east of Cana; the Fifth George Vanderbilt Expedition of 

 the Academy of Natural Sciences collected it at 900 m on Mt. Sapo in 

 1941 ; and I took males on Cerro Pirre at the head of the Rio Seteganti 

 (480 m) in 1961 and on the Rio Jaque at the mouth of the Rio Imama- 

 do in 1947. This race also occurs in western Colombia; other races 

 range as far as Guyana, Amazonian Brazil, and Bolivia. 



There is some variation within the race oressinoma: birds from 

 Darien tend to be somewhat darker, more ochraceous below, and those 

 from Caldas, Colombia, are yellowest, but individual variation bridges 

 the differences. E. x. oressinoma probably ranges into Ecuador, but Ol- 

 son has not seen specimens from there referable to this subspecies. 

 These populations were formerly recognized under the name chocoensis 

 Hellmayr (Rev. Prang. Ornith., vol. 2, 1911 p. 23), but Olson, in his 

 description of oressinoma, has shown chocoensis to be a smaller form 

 that is restricted to the Pacific lowlands of Colombia and Ecuador. 



The Orange-bellied Euphonia has been found in forest and forest 

 borders. The bird I took at Cerro Pirre on January 28, 1961, was part 



