FAMILY TYRANNIDAE 509 



dusky ; outer webs of greater and middle coverts tipped and edged 

 with sulphur yellow ; primaries edged with yellowish olive-green, the 

 edgings changing on the secondaries to light yellow ; tail grayish 

 brown, edged with olive-green ; a grayish white line above the lores 

 extending to a narrow ring around the eye on upper and lower eye- 

 lids ; an indistinct dusky spot at anterior angle of eye ; auricular 

 region dull olive-green, with shaft lines of pale yellow ; chin and 

 throat light yellowish gray, changing to light yellowish olive-green 

 on upper breast and sides ; rest of under surface clear sulphur yellow ; 

 edge of wing bright sulphur yellow ; axillars, under wing coverts and 

 edgings of primaries pale yellow. 



A female, shot at El Cope, Code, February 24, 1962, had the iris 

 light grayish brown ; maxilla black ; mandible ivory-white ; tarsus light 

 fuscous-brown ; tips of claws black ; inside of mouth with palate 

 black to fuscous ; lower surface, ivory-white (of the same shade as 

 the outer surface of the mandible) . 



Measurements. — Males (10 from Chiriqui, Veraguas, Code, Los 

 Santos, Canal Zone, and Province of Panama), wing 63.8-69.5 

 (65.2), tail 52.3-58.6 (55.2), culmen from base 13.3-15.9 (14.4), 

 tarsus 17.5-18.8 (18.1) mm. 



Females (10 from Chiriqui, Veraguas, Code, Los Santos, Canal 

 Zone, and Province of Panama), wing 60.2-64.7 (63.4), tail 51.0- 

 55.5 (53.6), culmen from base 14.2-15.4 (14.6), tarsus 17.5-18.5 

 (17.9) mm. 



Weight of $, 11 grams (G.V.N. Powell). 



Resident. Fairly common locally ; on the Pacific slope, from western 

 Chiriqui, mainly in the lowlands of the Tropical Zone, but to 1600 

 meters above Boquete, east through Veraguas, Code, and the Azuero 

 Peninsula to the lower Rio Bayano (Chepo), Chiman, and the Rio 

 Maje. On the Caribbean side from the Rio Indio, western Colon, 

 through the northern Canal Zone, to Mandinga, western San Bias. 



They are found mainly in open forest, usually in undergrowth, but 

 occasionally in taller trees, and are encountered also in open scrub and 

 along the borders of clearings. In eastern Chiriqui I found them near 

 the coast at Las Lajas and also on the Rio San Felix, where they had 

 been taken earlier by Mrs. Davidson. In the early collections made by 

 Arce they were recorded from Santa Fe and Calovevora in Veraguas, 

 and later by Benson at San Francisco, El Villano, and Chitra. In 

 1953 I found them fairly common near Sona, especially along the 

 Rio San Pablo. In 1951 at El Valle, Code, they ranged in the open 

 forest of Cerro Gaital, and farther east in western Province of 



