FAMILY TYRANNIDAE 589 



faustus agrees in this, the average in the latter race is about 2 milli- 

 meters longer. 



LEPTOPOGON SUPERCILIARIS Tschudi: Slaty-capped 

 Flycatcher, Moscareta Cabecipizarrosa 



Leptopogon supcrciliaris Tschudi, Arch. Naturg., vol. 10, band 1, 1844, p. 275. 

 (Peru.) 



Medium size ; crown slate color, back olive-green ; a large black 

 spot behind the eye. 



Description. — Length 125-135 mm. Adult (sexes alike), crown 

 dark gray to slate color, the feathers darker centrally ; changing on 

 hindneck, back, scapulars, lesser wing coverts, and rump to olive- 

 green; upper tail coverts brownish; wings (except lesser coverts) 

 dusky; middle and greater coverts edged with pale buff to pale cin- 

 namon-buff ; primaries edged narrowly with olive-yellow ; secondaries 

 bordered more broadly with yellow to yellowish white ; lores and 

 space above nostril mixed grayish white and dusky ; a narrow border 

 of white on edge of eyelids around the eye ; posterior area of side of 

 head black ; a few whitish spots in an indistinct line at posterior angle 

 of eye ; chin and throat pale olive-gray, lined indistinctly with white, 

 changing to olive-gray on upper breast and sides ; abdomen and 

 under tail coverts pale yellow ; tibiae dull olive-green ; axillars and 

 under wing coverts yellowish white, yellower on carpal edge of wing; 

 inner margins of wing feathers dull white to pale buff. 



As a species these flycatchers range from Costa Rica south through 

 northern South America to Peru, Bolivia, and Brazil. In Panama 

 they are inhabitants of highland forests, with those of the west, in 

 Chiriqui and Veraguas, differing slightly from those of Darien, 

 so that two geographic races are recognized. 



LEPTOPOGON SUPERCILIARIS HELLMAYRI Griscom 



Leptopogon supcrciliaris hclltnayri Griscom, Bull. Mus. Comp. Zool., vol. 69, 

 no. 8, April 1929, p. 175. (Carrillo, Cartago, Costa Rica.) 



Characters. — Slightly darker on upper surface, and on foreneck 

 and breast ; abdomen somewhat deeper yellow. 



Measurements. — Males (7 from Costa Rica, Chiriqui, and Vera- 

 guas), wing 64.3-69.3 (67.0), tail 57.5-65.5 (60.5), culmen from 

 base 13.4-14.6 (14.0, average of 6), tarsus 14.7-15.6 (15.2) mm. 



Females (10 from Costa Rica, Chiriqui, and Veraguas), wing 

 59.0-63.0 (60.9), tail 48.5-55.5 (51.5), culmen from base 12.9-14.8 

 (13.7), tarsus 13.9-15.0 (14.5) mm. 



