402 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



Medium size ; generally similar to M. hemichrysus but white 

 streak behind eye much smaller ; paler yellow on lower surface, with 

 breast indistinctly streaked. 



Description. — Length 195-205 mm. Adult (sexes alike), crown 

 and hindneck dark gray ; forehead freckled with white ; a narrow 

 white superciliary, slightly expanded behind eye ; a partly concealed 

 yellow spot, bordered with white laterally, in center of crown; a 

 dusky stripe on side of head from lores through eye and auricular 

 region ; hindneck, back, and rump dull greenish gray, with lower 

 rump and upper tail coverts bordered narrowly with rufous ; tail 

 fuscous, the rectrices bordered externally faintly with whitish, in- 

 ternally more broadly with cinnamon-bufif ; wings fuscous ; inner 

 secondaries bordered with white ; greater and middle coverts edged 

 with white to dull buff ; primaries, except the two external, and outer 

 secondaries edged with rufous ; a dull white malar streak bordered 

 below by a broader line of dark gray ; chin and foreneck dull white 

 to faintly huffy white ; rest of under surface rather dull yellow ; breast 

 and sides streaked indistinctly with dark gray ; axillars and under 

 wing coverts pale yellow ; inner border of under wing feathers edged 

 narrowly with pale cinnamon-buff. 



Immature, upper breast and foreneck washed with buff. 



Measurements. — Males (10 from Darien and Colombia), wing 

 103.5-107.8 (105.7), tail 82.5-89.0 (85.0), culmen from base 22.5- 

 25.7 (23.9), tarsus 17.5-18.8 (18.1) mm. 



Females (10 from Darien and Colombia), wing 97.7-103.8 

 (101.3), tail 79.1-84.7 (82.3), culmen from base 22.5-25.5 (24.0), 

 tarsus 17.9-19.2 (18.5) mm. 



Resident. Rare in the Subtropical Zone of Cerro Pirre and Cerro 

 Tacarcuna, Darien. 



This flycatcher, widely distributed in the mountains of Colombia 

 and Ecuador, is known in Panama from two specimens in the col- 

 lections of the U.S. National Museum (first reported in Proc. Biol. 

 Soc. Washington, vol. 80, 1967, p. 242). The first, a female, was 

 collected by E. A. Goldman on Cerro Pirre, April 17, 1912, at 1580 

 meters near the head of the Rio Limon. The second, a male, was 

 secured by Dr. Pedro Galindo of the Gorgas Memorial Laboratory 

 on May 25, 1963, at 1460 meters near the point where the ridge of 

 Cerro Mali joins the higher slopes of Cerro Tacarcuna in the Serrania 

 del Darien, a short distance from the low divide that marks the 

 boundary with Colombia. 



