304 BIRDS OF THE REPUBLIC OF PANAMA PART 2 



green, occasionally with a very narrow line of lighter glistening 

 feathers on the lores and adjacent to the base of the bill ; tail coverts 

 varying sometimes to bluish green ; tail blue-black, the central pair 

 of feathers glossed lightly with bluish green ; wings dusky faintly 

 glossed with purple; under surface brighter metallic green than the 

 back, occasionally with a slight sheen of blue; femoral tufts white. 



Female, above bright metallic green to bronze-green; with the 

 upper tail coverts often bluish green ; tail blue-black with the central 

 rectrices often dull metallic green ; two or three outer feathers tipped 

 with pale grey ; wings as in male ; line from lores back across auricular 

 region dusky ; a post-ocular spot white or grayish white ; under 

 surface pale gray ; lumbar tufts white. 



Immature male, like female but darker gray below, changing 

 quickly to the green adult dress. 



Male, iris dark brown ; bill black ; tarsus fuscous-black ; toes 

 and claws black. Female similar, but tarsus often black. 



Measurements. — Males (21 specimens), wing 43.5-48.3 (46.0), 

 tail 26.4-29.1 (27.5), oilmen from base 14.1-16.9 (15.6) mm. 



Females (15 specimens), wing 42.6-46.8 (4-12), tail 23.9-26.3 

 (25.4),culmen from base 15.5-18.4 (16.9) mm. 



Weight, 1 male 3.03 grams; 7 females 3.13 ±0.06 grams (Hart- 

 man, Auk, 1954, p. 468.) 



Resident. Fairly common in the tropical lowlands of the Pacific 

 slope from the Costa Rican boundary to Chepo and La Jagua, more 

 rarely to the Rio Maje (Charco del Toro) and Garachine. On the 

 Atlantic slope recorded rarely in the lowlands of Bocas del Toro 

 (Almirante, Cricamola) ; fairly common in the lower Chagres Valley 

 from the Canal Zone (Barro Colorado Island, Colon, Juan Mina) 

 east inland to the lower Rio Boqueron (Peluca Hydrographic Sta- 

 tion). Isla Coiba; Isla Parida, Isla Bolahos ; Isla Gobernadora, Isla 

 Cebaco ; Isla Iguana ; Isla Taboga, Isla Taboguilla, Isla Urava ; 

 Archipielago de las Perlas (islas Pacheca, Saboga, Contadora, 

 Chapera, Bayoneta, Malaga, Del Rey, Canas, Santelmo, Pedro 

 Gonzalez, and San Jose) . 



This hummingbird, found in open lands, undoubtedly has extended 

 its range as the forests have been cleared. It is a venturesome bird, 

 as Bangs (Auk, 1901, p. 25) recorded observations by W. W. Brown, 

 Jr., who, in travel by schooner, saw allied hummers crossing from the 

 mainland to the distant Pearl Islands. 



This species frequents the borders of woodland, hedge rows 

 through the open fields, and thickets along stream beds, wherever 



