582 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



size and somewhat brighter color drew attention, but only in the 

 hand were they recognized, when I noted the roughened lower end 

 of the tarsus. In this, the slightly smaller scutes in this area are 

 smaller than those higher on this part of the leg, with slightly elevated, 

 rounded papillae, and the lower margin somewhat elevated and 

 thickened. During preparation of one, I noted that the feather tract 

 on the center of the back was elongated elliptical in outline, with a 

 narrow apterion down the center. 



The nominate race is found in small numbers in Costa Rica and 

 Chiriqui, with subspecies described from Colombia and Venezuela. 

 While currently the group is assigned to the Tyrannidae, earlier it 

 was placed in the Cotingidae. Lawrence, in his original description, 

 named the species "in compliment to Mr. J. Zeledon, an intelligent 

 and promising young naturalist and collector." 



The nest and eggs are not known. Meise (in Schonwetter, Handb. 

 Ool., pt. 15, 1968, p. 87) cites a record of von Ihering that describes 

 an egg of the somewhat larger A. hunneistcri, found from south- 

 eastern Brazil to Paraguay, Bolivia, and northern Argentina, as 

 yellowish with a wreath of dark brown and measurements of 16.0 X 

 12.5 mm. 



MICROTRICCUS BRUNNEICAPILLUS BRUNNEICAPILLUS 

 (Lawrence) : Yellow-bellied Tyrannulet, Moscareta Cejiblanca 



Figure 47 



Tyrannuhis brtmneicapillus Lawrence, Ibis, vol. 4, January 1862, p. 12. (Lion 

 Hill, Atlantic slope, Canal Zone, Panama.) 



Very small ; with short tail, plump body, and yellow under surface; 

 a conspicuous white line over eye. 



Description. — Length 72-85 mm. Adult (sexes alike), crown 

 somewhat sooty brown ; hindneck, auricular region, back, scapulars, 

 lesser wing coverts, rump, and upper tail coverts rather dull olive- 

 green ; primaries and secondaries dusky ; greater wing coverts, pri- 

 maries and secondaries edged with olive-green, this varying to some- 

 what paler yellowish olive-green on the flight-feathers ; tail dull 

 brown, edged faintly with greenish olive ; forehead white, extending 

 back above eye as a superciliary stripe ; lores dusky ; under surface, 

 including under tail coverts, canary yellow, with foreneck, breast, 

 and sides faintly tinged and lined with olive-green ; axillars and 

 under wing coverts pale yellow ; inner webs of wing feathers edged 

 with yellowish white. 



A female, taken March 4, 1964, at the old Tacarcuna village site 



