34^> BIRDS OF THE REPUBLIC OF PANAMA PART 2 



agree with the birds of Panama to which he applied the name buffonii 

 with micans as a synonym. The additional specimens now available, 

 however, support recognition of micans as a separate race. Birds from 

 the lower Magdalena Valley and the Santa Marta region in Colombia 

 east to northwestern Venezuela have the central rectrices decidedly 

 brighter green. These are recognized as the separate race aeneicanda 

 Lawrence. 



CHALYBURA UROCHRYSIA (Gould): Bronze-tailed Plumeleteer, 

 Colibri Colibronceado 



Large; under tail coverts white and enlarged (but somewhat less 

 so than in C. buffonii micans) ; base of mandible light-colored (reddish 

 brown to pinkish white) . 



Description. — Length 110-120 mm. Adult male, above, including 

 lesser to greater wing coverts, metallic green ; lower rump and upper 

 tail coverts coppery bronze ; tail bronze-green ; wings dusky with a 

 purplish sheen ; primary coverts mainly like wings, but in some in- 

 dividuals partly green ; f oreneck and upper breast dark blue to metallic 

 green, changing to dull metallic green and slaty gray on abdomen ; 

 femoral tufts and enlarged under tail coverts pure white ; under wing 

 coverts dark green. 



Adult female, above like the male ; f oreneck, breast, and abdomen 

 gray ; sides, including sides of neck, light metallic green ; femoral 

 tufts white; enlarged under tail coverts grayish white. 



This species, easily distinguished by the light-colored base of the 

 long, somewhat curved bill from the black-billed plumeleteer. its 

 companion in the genus in Panama, is equally common. 



Two geographic races are found in the Republic. 



CHALYBURA UROCHRYSIA UROCHRYSIA (Gould) 



Hypuroptila urochrysia Gould, Mon. Troch., pt. 22, July, 1861, pi. 7 and text 

 (=vol. 2, pi. 90 and text in completed book). (Western Colombia.) 



Characters. — Male, distinctly light glittering green on foreneck 

 and breast; tail dark blue, with only a faint wash of bronze on the 

 central rectrices ; female similar to that of C. u. isaurae, but faintly 

 more yellowish green above, with the central rectrices clearer dark 

 green, less bronzy. 



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

 68.2-70.9 (69.4), tail 42.1-45.6 (43.5), culmen from base 24.0-27.4 

 (25.5) mm. 



