FAMILY TYRANNIDAE 557 



race of Panama. Though sHghtly darker above, in this suggesting 

 the northern race suhpagana, the nominate form is grayer, less brown- 

 ish olive. As it is recorded only to northwestern Colombia in the 

 departments of Antioquia and Cordoba, there appears to be a con- 

 siderable gap in the total range of the species in eastern Darien and 

 eastern San Bias. Measurements of E. f. fJavogaster are as follows: 



Males (10 from Colombia), wing 79.2-81.6 (80.3). tail 67.8-74.1 

 (70.7), culmen from base 12.2-13.4 (12.7), tarsus 18.5-19.9 (18.9) 

 mm. 



Females (10 from Colombia), wing 75.0-78.1 (77.2), tail 64.2- 

 69.3 (67.4), culmen from base 12.0-13.2 (12.7), tarsus 18.3-19.5 



(18.8) mm. 



A series from northern Brazil is very slightly smaller, thus agreeing 

 closely in size with E. f. pallididorsalis. 



ELAENIA FLAVOGASTER SUBPAGANA Sclater and Salvin 



Elacnia subpagana P. L. Sclater and O. Salvin, Ibis, ser. 1, vol. 2, no. 5, 



January 1860, p. 36. (Duefias, Guatemala.) 

 Elaenia flavogastcr saturata Brodkorb, Occ. Papers Mus. Zool., Univ. Mich., 



no. 478, November 5, 1943, p. 1. (Palenque, Chiapas.) 



Darker, somewhat brownish olive, above ; grayer on the breast, and 

 faintly darker on the side of the head. 



Measurements. — Males (6 from Isla Coiba), wing 76.0-79.7 

 (78.0), tail 69.3-71.8 (70.7), culmen from base 12.4-14.0 (13.4), 

 tarsus 19.0-19.6 (19.1) mm. 



Females (7 from Coiba), wing 74.0-76.5 (75.4), tail 69.1-74.0 

 (71.8), culmen from base 12.5-14.0 (13.1), tarsus 18.5-19.8 



(18.9) mm. 



Resident. Common on Isla Coiba. 



The Yellow-bellied Elaenia was the more common of the two 

 species of this genus found on Isla Coiba, and as usual, came con- 

 stantly to attention through its calls. With other birds they visited 

 berry-bearing trees, and also were seen regularly along the borders of 

 cultivated fields where thickets afforded cover, and in the low tree 

 growth along the lower courses of the small rivers near the sea. On 

 Coiba they ranged regularly also in the tree crown of the tall forests 

 over the inland hills, where they lived high above the ground, a custom 

 that I have not noted except casually elsewhere. 



In the account of the avifauna of the island published in 1957 I 

 identified the Coiba population of this species under the name silvi- 

 cuUrix that I had proposed for the population of the Archipielago de 



