542 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



and one with sex not marked but believed to be a male, in the Na- 

 tional Museum, were taken by Dr. Pedro Galindo, at 1060 meters on 

 the high ridge of Cerro Mali. June 4, 1963. 



CAPSIEMPIS FLAVEOLA SEMIFLAVA (Lawrence): 

 Yellow Tyrannulet, Moscareta Amarilla 



Elainca semiflava Lawrence, Ann. Lye. Nat. Hist. New York, vol. 8, November 

 1865, p. 177. (David, Chiriqui.) 



Small, slender, with long, narrow tail ; olive-green above ; yellow 

 below ; line over eye, and two prominent wing bands, light yellow. 



Description. — Length 105-112 mm. Adult (sexes alike), upper 

 surface olive-green from crown to back, scapulars, lesser wing coverts, 

 rump, and upper tail coverts ; wings dusky ; middle and greater 

 coverts tipped broadly with pale yellow ; primaries narrowly, secon- 

 daries broadly edged with yellowish olive-green ; forehead, line above 

 lores and eye pale yellow ; lores dusky ; auricular region pale olive- 

 green, varied with indistinct shaft lines of dull yellow ; tail grayish 

 brown, with outer webs edged with yellowish green ; under surface, 

 including carpal edge of wing, axillars, and under wing coverts, 

 yellow (varying individually from bright yellow to yellowish white) ; 

 sides of upper breast washed lightly with dull olive; inner margins of 

 wing feathers edged narrowly with yellowish white. 



Juvenile, upper surface dull cinnamon-brown, brighter on the hind- 

 neck ; anterior lores dull white ; line over eye and wing bars pale 

 cinnamon-brown. 



A male, taken at El Potrero, Code, March 8, 1962, had the iris 

 very dark brown; maxilla and anterior half of sides of mandible 

 black; rest of mandible dull buffy white; tarsus and toes dark neutral 

 gray ; claws black ; inside of mouth, including the tongue, orange. 

 A female, at Puerto Armuelles, Chiriqui, February 12, 1966, had the 

 iris mouse brown ; base of mandible dull brown ; rest of bill fuscous- 

 brown ; tarsus and toes dusky neutral gray ; claws dull black. 



Measurements. — Males (10 from Isla Coiba, Chiriqui, Bocas del 

 Toro, Herrera, Canal Zone, and eastern Province of Panama), wing 

 49.5-52.3 (50.9), tail 48.1-51.5 (49.2), culmen from base 11.0-13.0 

 ( 11.6), tarsus 16.9-18.4 (17.6) mm. 



Females (10 from Isla Coiba, Chiriqui, Herrera, Code, and Canal 

 Zone) wing 45.7-50.0 (47.6), tail 45.0-48.9 (47.2), culmen from 

 base 11.0-12.4 (11.6), tarsus 16.2-18.4 (16.7) mm. 



Resident. Locally common in the Tropical Zone, on the Pacific 

 slope from western Chiriqui east locally, including the eastern side 



