l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I39 



THRYOTHORUS SEMIBADIUS Salvin: Salvin's Wren, Cucarachero 

 Castano Cabecimoreno 



Thryothorus semibadius Salvin, Proc. Zool. Soc. London, November 1870, p. 181. 

 (Bugaba, Chiriqui.) 



Characters. — Crown and hindneck chestnut, concolor with the 

 back; under surface white, barred, except for the throat, narrowly 

 with black, the breast feathers having three black bars ; size smaller. 



Measurements. — Males (8 specimens), wing 61.4-65.5 (63.3), tail 

 42.0-49.2 (46.3), culmen from base 18.7-21.0 (19.9), tarsus 23.4-24.0 

 (23.7) mm. 



Females (4 specimens), wing 61.2-64.7 (63.2), tail 43.7-47.4 

 (45.8), culmen from base 19.9-20.8 (20.3), tarsus 23.1-24.5 (23.8) 

 mm. 



Range. — Tropical zone of the Pacific slope from southwestern 

 Costa Rica in the valley of the Rio Pirris to western Panama in the 

 Comarca del Baru (Puerto Armuelles), and the lowlands of extreme 

 western Chiriqui (Divala, Bugaba). 



THRYOTHORUS NIGRICAPILLUS Sclater: Bay Wren, Cucarachero 

 CastaSo Cabecinegro 



Thryothorus nigricapilhts Sclater, Proc. Zool. Soc. London, pt. 28, May i860, 

 p. 84. (Nanegal, 4,000 feet elevation, Ecuador.) 



Characters. — Crown and hindneck deep black, in sharp contrast to 

 the chestnut of the remainder of the upper surface ; under surface 

 chestnut, auburn, chestnut-brown, clay color, or white, barred more 

 or less with black ; in the races that are white below, with 2 black bars 

 on each breast feather ; size larger. 



THRYOTHORUS NIGRICAPILLUS COSTARICENSIS (Sharpe) 



Thryophilus costariccnsis Sharpe, Catalogue of the birds in the British Museum, 

 vol. 6, 1881, p. 217. (Valley of the Rio San Carlos, Alajuela, Costa Rica.) 



Characters. — Throat and upper foreneck white, rest of lower sur- 

 face auburn to hazel ; sides in some specimens with a few bars of 

 black, which usually are indistinct. 



Measurements. — Males (17 specimens), wing 66.5-72.0 (69.3), tail 

 51.0-56.8 (54.3), culmen from base 20.4-22.7 (21.3), tarsus 24.5-27.8 

 (25.9) mm. 



Females (9 specimens), wing 62.5-67.2 (64.6), tail 47.8-54.0 

 (50.2), culmen from base 19.4-21.7 (20.5), tarsus 23.2-25.6 (24.5) 

 mm. 



Range. — Caribbean slope from southeastern Nicaragua (Los Saba- 

 los, Rio Escondido, San Juan del Norte) through eastern Costa Rica 

 (Rio Frio, Guayabo, Bonilla, Jimenez, Reventazon) to central Bocas 



