FAMILY TYRANNIDAE 469 



Farfan Beach, Canal Zone, October 5, 1953. Notes from Eisenmann 

 cite the record of another netted at Almirante, Bocas del Toro, on 

 October 19. 1965. by banders working for Loftin. This bird, small in 

 size (wing 63.5 mm measured fllat). distinct eye-ring, and olivaceous 

 upper surface, was identified as a Least Flycatcher, banded and 

 released. 



The Least Flycatcher, common in winter south through Honduras 

 and El Salvador, is recorded by Slud as rare in Costa Rica. Only 

 stragglers appear to reach Panama. 



EMPIDONAX FLAVESCENS FLAVESCENS Lawrence: 

 Yellowish Flycatcher, Moscareta Amarillenta 



Empidonax flavescens Lawrence, Ann. Lye. Nat. Hist. New York, vol. 8, 



1865, p. 133. (Barranca, Costa Rica.) 

 Empidonax flavescens floresae Griscom, Amer. Mus. Nov., no. 280, September 10, 



1927, p. 10. (Cerro Flores, 1220 meters, eastern Chiriqui, Panama.) 

 Empidonax flavescens chitrae Griscom, Amer. Mus. Nov., no. 280, September 10, 



1927, p. 10. (Chitra, 915 meters, eastern Veraguas, Panama.) 



Small; a distinct white eye-ring; yellowish green above; yellow 

 under surface, with bufif across breast. 



Description. — Length 120-130 mm. Adult (sexes alike), above 

 deep yellowish green ; lesser wing coverts like back ; rest of wings 

 grayish brown to dusky; middle and greater coverts tipped widely 

 with buff to cinnamon-buff, forming two broad bands ; primaries 

 edged narrowly with light olive ; secondaries edged with buff to buffy 

 white ; tail dark grayish brown, edged with yellowish green ; bare 

 rim of eyelids black ; a prominent white or pale yellowish white eye- 

 ring ; side of head and neck yellowish olive-green ; auricular area with 

 faint yellowish shaft lines ; chin and upper throat yellow or yellowish 

 white, in some suffused laterally with grayish ; breast yellowish olive ; 

 rest of lower surface pale yellow ; a concealed tuft of white to 

 yellowish white on flanks over tibia ; axillars and under wing coverts 

 pale yellow; edge of wing buff to cinnamon-buff; inner edge of wing 

 feathers pale buff. 



Juvenile, brownish olive-green above ; tips of wing coverts and 

 edging of secondaries cinnamon-buff ; chest pale cinnamon-buff ; lower 

 breast and abdomen white to yellowish white washed with buff on 

 the sides. 



Measurements. — Males (10 from Chiriqui) , wing 67.5-70.8 (69.1 ) , 

 tail 52.3-55.5 (53.7). culmen from base 13.1-14.7 (14.1), tarsus 

 16.0-16.5 (16.3) mm. 



Females (10 from Chiriqui), wing 58.6-64.4 (62.7), tail 47.5- 



