400 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



present for the nesting period from late February and early March 

 until late September. 



MYIODYNASTES HEMICHRYSUS (Cabanis) : Golden-bellied 

 Flycatcher, Papamoscas Barriga-dorada 



Hypcrmitrcs hcinichrysus Cabanis, Journ. f. Orn., vol. 9, July 1861, p. 247. 

 (Costa Rica.) 



Medium size ; bill large, a broad white line above and behind eye, 

 a narrow one below ; lower surface bright yellow. 



Description. — Length 190-205 mm. Adult (sexes alike), anterior 

 crown dark gray with very fine dusky shaft lines, paler, faintly 

 mottled with white, on forehead, changing to slaty black on posterior 

 half ; a partly concealed orange-yellow stripe, bordered with white, on 

 center of crown ; superciliary white, greatly expanded behind the 

 eye, the two sides separated behind by dark gray of hindneck ; a broad 

 black line on side of head, passing through eye ; below this a narrow 

 line of dull white bordered below by a broader line of dull grayish 

 black on the ramal area ; back dark grayish green ; lower rump and 

 upper tail coverts somewhat darker, bordered narrowly with dull 

 rufous; tail fuscous with the feathers bordered narrowly externally 

 with dull gray, internally more broadly with pale dull buff ; wings 

 fuscous-black ; inner secondaries bordered with yellowish white ; 

 primary coverts and inner primaries edged narrowly with rufous ; 

 chin and throat white ; rest of under surface bright yellow ; axillars 

 and under wing coverts pale yellow ; inner webs of flight feathers 

 narrowly cinnamon-buff. 



Immature, white stripes on side of head much broader ; crown and 

 back dull grayish brown ; wings and tail more broadly edged with 

 rufous ; under surface paler yellow. 



H. J. Watson in an adult male (Amer. Mus. Nat. Hist. no. 496579) 

 taken at Boquete, Chiriqui, April 19, 1905, recorded the iris as brown ; 

 bill black, and feet black. 



Measurements. — Males (10 from Chiriqui and Veraguas), wing 

 102.9-107.7 (105.7), tail 80.1-86.0 (83.1), culmen from base 21.0- 

 24.7 (23.4), tarsus 18.2-20.3 (19.4) mm. 



Females (9 from Costa Rica, Chiriqui, and Veraguas), wing 97.0- 

 103.6 (100.3), tail 79.5-84.5 (81.7), culmen from base 21.8-24.0 

 (22.9), tarsus 17.5-20.0 (19.3) mm. 



Resident. Rare in the Subtropical Zone in western Chiriqui ; re- 

 corded also in the higher elevations of western Bocas del Toro, and in 

 Veraguas. 



