460 BIRDS OF THE REPUBLIC OF PANAMA — PART 2 



The species is one of wide range in northern South America. 

 The race melanogenia, with black chin and the four central rectrices 

 green ranges from western Chiriqui and western Bocas del Toro in 

 Panama north through Central America to southern Mexico. Re- 

 cently the nominate subspecies, in which the chin is white and only 

 two central rectrices are green, has been recorded near El Real in 

 Darien. These two, recognized now as geographic races, originally 

 were considered closely related species. In pure form they differ dis- 

 tinctly in the number of dark-colored central rectrices, and in the 

 color of the throat. The dark-chinned group, absent from the 

 Isthmus except, as stated, in the far west near Costa Rica, is found 

 again in western Colombia and western Ecuador. Where it meets 

 nominate ruftcauda in northwestern Antioquia the two hybridize 

 through a narrow area, along the upper valleys of the streams that 

 flow to the southeastern shores of Bahia Colombia south of Turbo. 

 This has been described in detail by Jiirgen Haffer (Amer. Mus. 

 Nov., no. 2294, 1967, pp. 37-42). It should be noted that the col- 

 lections made for the Smithsonian by M. A. Carriker, Jr., indicate 

 a broader zone of hybridization than that described by Haffer as 

 they include specimens of obvious intermediate character from 

 Necocli to the north on the eastern side of the Golfo de Darien, and 

 in Cordoba from the upper Sinu Valley at Nazaret and at Quebrada 

 Salvajin on the Rio Esmeralda a short distance above the point where 

 that stream joins the Rio Sinu. 



GALBULA RUFICAUDA RUFICAUDA Cuvier 



Galbula ruficauda Cuvier, Regne Anim., vol. 1, 1817 (December 1816), p. 420. 

 (Guiana.) 



Characters. — Two central rectrices metallic golden green; chin 

 white. 



Measurements. — Males (11 from Antioquia and Bolivar, north- 

 western Colombia), wing 78.7-82.4 (80.0), tail 99.1-114.2 (106.6), 

 culmen from base 46.2-54.8 (50.0), tarsus 12.0-12.8 (12.3) mm. 



Females (12 from Antioquia and Bolivar, northwestern Colombia), 

 wing 77.3-84.6 (80.5), tail 94.0-104.6 (98.4), culmen from base 42.0- 

 53.0 (47.7), tarsus 12.0-12.8 (12.3) mm. 



Resident. Recorded in the lower Tuira Valley, Darien. 



The only record for this race is of 3 living young taken April 3, 

 1966, from a nest burrow on the Rio Pirre near El Real. The man 

 who found them kept 1 (subsequent history not known) ; P. N. 

 Slattery secured the others. One, a female, lived until April 10, 



