FAMILY TYRANNIDAE 583 



on the base of Cerro Mali, Darien, had the iris warm brown ; maxilla 

 black ; mandible fuscous-black, changing to light grayish brown on 

 the central line of the gonys ; tarsus, toes, and claws dark neutral 

 gray. 



Measurements. — Males (9 from Canal Zone, eastern Province of 

 Panama, Darien. and Costa Rica), wing 42.2-47.5 (44.8), tail 23.9- 

 27.4 (25.4), culmen from base 9.0-9.5 (9.2), tarsus 13.6-15.7 

 (14.8) mm. 



Figure 47. — Yellow-bellied tyrannulet, moscareta cejiblanca, Microtriccus 

 brunneicapillus brunneicapillus. 



Females (4 from Darien and Costa Rica), wing 41.6-42.9 (42.1), 

 tail 22.2-22.9 (22.4), culmen from base 8.3-9.2 (8.8), tarsus 12.4- 

 13.6(12.9) mm. 



Resident. Found locally in small numbers in forested areas ; on 

 the Pacific slope from Cerro Campana, western sector of Panama, 

 southern Canal Zone, and through the eastern sector of the Province 

 of Panama, eastward to Darien ; on the Caribbean side, recorded at 

 Cocoplum, Bocas del Toro ; in the lower Chagres Valley in the Canal 

 Zone, and in eastern San Bias (Perme, Puerto Obaldia). 



R. S. Ridgely recorded it in Cerro Campana July 3, 1968. It was 

 named from Lion Hill, now submerged in Gatun Lake, from speci- 

 mens collected by McLeannan, and was found there also and at Gatun 



