NO. 9 BIRDS OF ISLA COIBA, PANAMA—WETMORE 67 
CAPSIEMPIS FLAVEOLA SEMIFLAVA (Lawrence): Yellow Tyrannulet, 
Moscareta Amarilla 
Elainea semifiava LAwrENnce, Ann. Lyc. Nat. Hist. New York, vol. 8, November 
1865, p. 177. (David, Chiriqui.) 
In the edge of the forest I found a few coming to low berry- 
bearing trees in company with other small birds, and also noted them 
in thickets at the border of mangroves and in old fields that were 
covered with brush, this being a common habitat with them on the 
mainland. They move about actively, usually in the lower branches 
or near the ground, often twitching the long tail like a gnatcatcher. 
The four taken resemble specimens from the mainland. 
ELAENIA CHIRIQUENSIS CHIRIQUENSIS Lawrence: Lesser Elaenia, 
Mofioncita 
Elainea chiriquensis LAWRENCE, Ann. Lyc. Nat. Hist. New York, vol. 8, Novem- 
ber 1865, p. 176. (David, Chiriqui.) 
I found this small elaenia visiting berry-bearing trees in company 
with manakins and other small birds, feeding in guarumo trees in 
the forest, and also ranging in low second growth bordering the 
cultivated fields, these being usual haunts of the species. In addition, 
they ranged over the forest crown in the summits of the tallest trees, 
where it was only occasionally that I could secure one for a specimen 
because of the great distance above the ground. 
The nine specimens obtained agree in color with skins from 
Veraguas and Chiriqui. Two taken have the merest trace of white 
in the crown. In more or less worn plumage in the nesting season 
they become much darker above than when freshly molted. 
ELAENIA FLAVOGASTER SILVICULTRIX Wetmore: Yellow-bellied 
Elaenia, Mofiona Pechi-amarilla 
Elaenia flavogaster silvicultrix WeEtTMor®, Proc. Biol. Soc. Washington, vol. 50, 
Mar. 11, 1946, p. 51. (Isla San José, Archipiélago de las Perlas, Panama.) 
These elaenias were more common than the smaller species, and 
also were more prominent because of their louder calls. I found 
them regularly at trees bearing small ripening drupes, also in the 
thickets around the cultivated fields, and in the swampy forests along 
the lower courses of the rivers. Inland they were seen in the forest 
crown high above the ground, descending lower at times to feed in 
the guarumo trees. They are easily distinguished from the smaller 
mofiona of the same genus by yellower abdomen and more prominent 
crest. The larger size also is evident on many occasions. 
