90 BIRDS OF THE REPUBLIC OF PANAMA PART 4 



in vines, four feet up, by a stream; contained one fresh egg measuring 

 .90X.59 in." (Equivalent to 2.3x1.5 cm.) The color of the egg 

 is not given. 



The notes of E. A. Goldman describe a nest of this species under 

 construction near Gatun, Canal Zone, on February 2, 1911. It was 

 located about 3.6 m above the ground in dense forest. D. E. Harrower 

 ( 1936 thesis at Cornell University) indicated that the breeding season 

 in the Canal Zone ran from late April into August. The season may be 

 longer, however, since on November 21, 1957, F. O. Chapelle and G. 

 Goldstein found a pair completing a nest near Gatun; an abandoned 

 nest was nearby (in litt. to Eisenmann). 



THRYOTHORUS NIGRICAPILLUS SCHOTTII (Baird) 



Thryophilus schottii Baird, Rev. Amer. Birds Mus. Smithsonian Institution, vol. 

 1, August 1864, p. 123 (in Key), and September 1864, p. 133. (Rio Truando, 

 Choco, Colombia.) 



Thryophilus nigricapillus connectens Chapman, Bull. Amer. Mus. Nat. Hist., vol. 

 31, July 23, 1912, p. 157. (Cocal, 5000 ft. elevation, Cauca, Colombia.) 



Characters. — Lower surface white, becoming buff on lower abdo- 

 men, flanks and undertail coverts, heavily barred with black, in typical 

 form this marking extending from the upper foreneck to the undertail 

 coverts, in some also over the throat; buff on undersurface darker, 

 restricted to flanks, lower abdomen, and undertail coverts. 



A male, taken at Puerto Obaldia, San Bias, March 1, 1963, had the 

 iris mouse brown; maxilla black; tip of mandible dull pale olive-green, 

 blackish on sides, changing at center to light orange-yellow; gape 

 honey yellow; tarsus and toes fuscous-black; claws dark neutral gray. 

 An immature female at Pucro, Darien, February 5, 1964, was similar in 

 color of iris; maxilla, except cutting edge, fuscous-black; tip of mandi- 

 ble dull greenish yellow, changing on side to pale neutral gray; cutting 

 edge of maxilla, gape, and basal two-thirds of mandible honey yellow; 

 tarsus and toes fuscous-black; claws fuscous. 



Measurements. — Males (10 from Darien), wing 64.0-66.9 (65.7), 

 tail 48.0-52.3 (49.7), culmen from base 19.5-22.1 (20.9), tarsus 24.3- 

 26.8 (25.1). 



Females (10 from Darien), wing 58.2-64.3 (61.9), tail 43.2-49.5 

 (46.5), culmen from base 18.6-20.3 ( 19.6) , tarsus 22.3-24.3 (23.4) mm. 



Resident. Common, widely spread through Darien in the upper 

 valley of the Rio Tuira, from the Rio Cupe, the Rio Paya, and the Rio 

 Pucro to the base of Cerro Tacarcuna; on Cerro Pirre at Cana; on the 

 Rio Sambu; along the Pacific Coast from Bahia Pinas to Jaque, and the 



