FAMILY TROGLODYTIDAE 



9> 



Rio Jaque, inland to the Rio Imamado; on the Caribbean coast of San 

 Bias inland at Armila and Puerto Obaldia. 



In adjacent Colombia this race ranges widely from Acandi and the 

 Choco southward. 



Stomachs examined were filled with broken bits of a wide variety of 

 insects, and occasionally of a spider, often a fairly large one. One had 

 swallowed a small grass seed, apparently a chance occurrence. Six 

 collected by Burton (Bull. Brit. Orn. Club, 1975, p. 85) ranged in 

 weight from 17.7 to 23.8 g, averaging 20.9 g. 



THRYOTHORUS NIGRICAPILLUS REDITUS (Griscom) 



Thryophilus nigricapillus reditus Griscom, Bull. Mus. Comp. Zool., vol. 72, Janu- 

 ary 1932, p. 358. (Perme, San Bias, Panama.) 



Characters. — Similar to T. n. castaneus but somewhat lighter 

 colored; white of breast more extensive; sides and abdomen more 

 extensively barred with black. 



A fully grown immature female at the Peluca Hydrographic Station 

 back of Madden Lake, March 7, 1961, had tarsus and toes black, the 

 inner lining of the mouth honey yellow (including the tongue, except 

 for a spot of black on the base). An adult female collected near the 

 Peluca Hydrographic Station, March 10, 1961, had the tongue black 

 except for the tip and two pointed lateral projections at the base, which 

 were yellow. 



Measurements. — Males (14 from Cerro Azul, Chimin, Charco del 

 Toro, and Cerro Chucanti, in eastern Province of Panama, and Man- 

 dinga and Perme, San Bias), wing 67.0-70.5 (68.1), tail 47.5-54.3 

 (51.8), culmen from base 19.3-21.9 (20.9), tarsus 24.0-26.5 (25.5) 

 mm. 



Females (11 from Cerro Bruja, eastern Colon, Cerro Azul, Chimin, 

 Charco del Toro, Cerro Chucanti in eastern Province of Panama; and 

 Mandinga, San Bias), wing 63.2-67.7 (65.4), tail 45.0-51.4 (48.5), 

 culmen from base 19.0-21.5 (20.1 ), tarsus 23.1-26.3 (24.7) mm. 



Resident. On the Caribbean side from eastern Colon (Portobelo, 

 Cerro Bruja), through San Bias, from Mandinga to Perme. 



A nest seen March 9, 1961, near the Candelaria Hydrographic 

 Station was built at the end of a dead branch projecting a few meters 

 in the open among the leaves of fairly dense undergrowth on the bank 

 of Rio Pequeni. It was an untidy ball of yellowish white fibers as large 

 as a coconut. An adult was flushed from the nest, which held 2 nestlings 

 with the feather growth barely beginning. 



