FAMILY TROCHILIDAE 321 



coverts green, except for the three specialized feathers in the center, 

 which are white. 



Female, above, including wing coverts, light metallic green ; wings 

 fuscous-black, with a faint purplish sheen ; tail as in male, but also 

 tipped lightly with grayish white ; central under surface light grayish 

 white, with the sides spotted with light metallic green; femoral 

 tufts and specialized central under tail coverts white, as in male. 



Immature male, somewhat darker green above than female ; under 

 surface darker gray, spotted heavily throughout with glittering green. 



A fully adult male, taken January 12, 1949, on Cerro Azul, had 

 the iris dark brown ; maxilla and tip of mandible dull black ; base of 

 mandible flesh color; feet dull dark brown; claws black. An im- 

 mature male, collected February 24, 1964, on Cerro Mali, Darien, 

 was similar, except that the base of the mandible was very pale 

 brownish white, the gape was yellow, and the bare lower end of the 

 tarsus and the toes were pale dull neutral gray. The inside of the 

 mouth in this individual was dull black on the inner surface of the 

 maxilla and of the tip of the mandible. The rest of the inside of the 

 mandible and the tongue were dark honey yellow. 



Measurements. — Males (15 from cerros Azul, Bruja, Mali, and 

 Tacarcuna), wing 50.8-53.0 (517), tail 27.8-33.0 (30.1), culmen 

 from base 16.7-21.4 (18.6) mm. 



Females (9 from cerros Azul, Mali, and Tacarcuna), wing 47.5- 

 49.0 (48.1), tail 25.1-28.0 (26.0), culmen from base 18.0-20.2 

 (18.9) mm. 



Resident. Locally common in the Subtropical Zone in the mountains 

 of eastern Panama; recorded on Cerro Bruja, Cerro Azul, Cerro 

 Tacarcuna, and Cerro Mali. 



This is a forest species that on the Pacific side of the Cerro Azul 

 comes in gallery forest as low as 600 meters, but is more common 

 in denser growth up to 900 meters. On Tacarcuna it is most common 

 in and around areas of cloud forest. It is probable that it will be 

 found on the higher, forested peaks throughout the Serrania del 

 Darien. 



As their forest haunts have been little frequented by men, I have 

 found them tame, and readily attracted by squeaking. At times they 

 have alighted nearby, or again have hovered momentarily with softly 

 humming wings, a beautiful sight, before they darted away. Males 

 have a low, quickly uttered, chirping song. They were observed feed- 

 ing at flowers. 



The enlarged and stiffened central under tail coverts, clear white 



