344 BIRDS OF THE REPUBLIC OF PANAMA PART 2 



Museum of Natural History is labeled "Veragua Arce ex Boucard." 

 This is too uncertain to accept as a valid record for Panama, especially 

 since Arce made collections in Costa Rica before he came to the 

 Isthmus. The male in this race is definitely reddish purple above and 

 below and, with the female, has the amount of white in the tail reduced 

 in comparison to what is found in typical albocoronata. 



CHALYBURA BUFFONII MICANS Bangs and Barbour: Black- 

 billed Plumeleteer, Colibri Verde de Buffon 



Chalybura buffoni micans Bangs and Barbour, Bull. Mus. Comp. Zool., vol. 65, 

 September 1922, p. 204. (Cerro Sapo, Darien, Panama.) 



Large ; under tail coverts long, broad, pure white ; bill black. 



Description. — Length 118-127 mm. Under tail coverts greatly 

 enlarged and elongated, extended distally to center of tail or beyond. 

 Adult male, above dark metallic green, including the outer webs of 

 the inner primary coverts, and all of the other wing coverts ; feathers 

 of crown margined narrowly with dusky ; upper tail coverts more or 

 less bronze ; rectrices dark blue-black, occasionally with the outer webs 

 of the central pairs somewhat greenish bronze ; wings and outer pri- 

 mary coverts dull brownish slate with a purplish sheen ; under surface 

 metallic grass green, the individual feathers with a subterminal bar of 

 grayish white to white, these appearing as narrow, partly concealed 

 scales ; under wing coverts metallic grass green ; femoral tufts, lower 

 abdomen and under tail coverts white. 



Adult female, like the male, but side of head below eye and under 

 surface light gray spotted or washed on sides with light metallic grass 

 green, this color in some extended over most or all of the foreneck and 

 breast; rectrices, except the central pair, tipped lightly with grayish 

 white ; lower abdomen and under tail coverts as in male. 



Immature male, like the adult, but partly grayish green across sides 

 and breast. 



An adult male, taken January 7, 1962, at Chiva Chiva, Canal Zone, 

 had the iris dark brown ; bill entirely black ; bare lower end of tarsus 

 and toes blackish brown ; claws black. An adult female, collected 

 January 12, 1963, at the same place, was similar except that the lower 

 end of the tarsus was fuscous, with the upper surface of the toes also 

 fuscous, and the under surface white. An immature female at Pucro, 

 Darien, February 9, 1964, differed only in having the gape honey 

 yellow. 



Measurements. — Males (11 from Panama), wing 67.6-70.8 (69.1), 

 tail 41.4-45.2 (43.4), oilmen from base 25.2-28.0 (26.7) mm. 



