FAMILY TYRANNIDAE 539 



PHYLLOSCARTES FLAVOVIRENS (Lawrence): Yellow-green 

 Tyrannulet, Moscareta Verdecita 



Leptopogon flavovircns Lawrence, Ann. Lye. Nat. Hist. New York, vol. 7, 

 1862, p. 472. (Atlantic slope, Panama Railroad, Canal Zone, Panama.) 



Small ; above olive-green ; underneath pale yellow. 



Description. — Length 100-110 mm. Adult (sexes alike), upper 

 surface olive-green, with the crown very slightly grayer than the 

 back ; wings dusky, with middle and greater coverts tipped broadly 

 with light yellow ; primaries edged with yellowish olive-green ; secon- 

 daries with borders yellower and wider ; a white ring around eye ; 

 lores grayish white, with a central spot of dark gray ; under surface, 

 including axillars and under wing coverts, pale yellow, except the chin 

 which is faintly whiter ; upper breast washed faintly with olive ; inner 

 margins of wing feathers edged with yellowish white. 



Measurements. — Males (8 from Canal Zone and eastern Province 

 of Panama), wing 52.5-57.5 (55.3), tail 47.0-51.8 (48.6), culmen 

 from base 11.2-13.5 (12.7), tarsus 16.2-17.5 (16.8) mm. 



Female (one from eastern Province of Panama), wing 48.0, tail 

 43.7, culmen from base 12.4, tarsus 15.4 mm. 



Resident. Rare ; recorded from the Canal Zone ; and on the Pacific 

 slope, from near Chepo, Chiman, and Cerro Chucanti, eastern 

 Province of Panama, and Garachine, Darien. 



The species was named by Lawrence from a male collected by 

 Galbraith and McLeannan, near the line of the railroad in the Canal 

 Zone, on the Atlantic slope (probably, but not certainly, in the 

 vicinity of Lion Hill station, now submerged in Gatun Lake between 

 Gamboa and Gatun). A second record is a male, formerly in the 

 Havemeyer collection, now in the Peabody Museum at Yale, collected 

 by Austin Smith at "Port Antonio" (San Antonio) on the lower Rio 

 Bayano, near Chepo. Another male, in the Academy of Natural 

 Sciences, was secured at Garachine, Darien, by Dawson Feathers, 

 on the Fifth George Vanderbilt Expedition. March 15, 1950, I 

 collected a pair at the base of Cerro Chucanti, near the head of Rio 

 Maje. Several ranged with a traveling group of other small birds that 

 moved actively through the forest tree crown 30 meters or more 

 above the ground along a small quebrada. On March 31, near 

 Chiman, I secured two more males, also from a mixed flock feeding 

 through the higher part of the tree crown near the lower Rio Chiman. 

 In the American Museum of Natural History there are three males 

 from the Canal Zone, one collected near the pipeline road back of 

 Gamboa, January 5, 1966, and one from the Chiva Chiva road, June 



