NO. 2 BIRDS OF ISLA ESCUDO DE VERAGUAS — WETMORE 21 



(Quebrada Cauchero, on the base of Cerro Chucanti), reaching tide- 

 water at Chiman, and on the Rio Maje (Charco del Toro). 



This race constitutes the definite intergrade between the western 

 group with bright brown breast and little or no barring, and the 

 eastern and southern population with completely barred breast. 

 Transition between castaneus and reditus on the west is fairly abrupt, 

 an intermediate condition being evident in one specimen from near 

 Frijoles in the Chagres drainage. Birds from near Colon are definitely 

 castancus, while those from near Portobello, 30 kilometers to the 

 east, are reditus. At the eastern end the type locality at Perme is 

 barely within the range, since skins from Puerto Obaldia, about 

 15 kilometers farther east, are intermediate toward schottii, which 

 is the race found on the coast at Acandi, Choco, Colombia, 25 kilo- 

 meters beyond Puerto Obaldia. 



THRYOTHORUS NIGRICAPILLUS SCHOTTII (Baird) 



Thryophilus schottii Baird, Review of American birds in the Museum of the 

 Smithsonian Institution, vol. 1, August 1864, p. 123 (in Key) ; September 

 1864, p. 133. (Rio Truando, Choco, Colombia.) 



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

 vol. 31, July 23, 1 912, p. 157. (Cocal, 5,000 feet elevation, Cauca, Colombia.) 



Characters. — White of throat and foreneck extending down over 

 breast, sides, and center of upper abdomen; lower surface heavily 

 barred with black, in typical form the bars covering the throat, but 

 in intermediate stage the throat partly or wholly plain. 



Measurements. — Males (16 specimens), wing 64.0-66.9 (67.3), tail 

 44.6-51.6 (48.2), culmen from base 19.5-21.5 (20.4), tarsus 24.4-26.8 

 (25.4) mm. 



Females (10 specimens), wing 59.9-65.6 (63.0), tail 43.0-47.8 

 (45.6), culmen from base 19.0-20.8 (19.6), tarsus 23.0-25.0 (24.1) 

 mm. 



Range. — Darien, eastern Panama, from the lower Rio Sambu 

 (Jesusito), and the lower Rio Tuira (Cituro, on Rio Cupe) inland 

 to 600 meters elevation near Cana, and south to the valley of the 

 Rio Jaque; continuing in Colombia throughout Choco (from the 

 Pacific coast across to Acandi on the Gulf of Uraba), and western 

 Antioquia in the Atrato valley (Villa Artiaga), and western Valle 

 (Buenaventura and San Jose), to western Cauca (Cocal) ; east into 

 southern Bolivar in the upper Sinii Valley (Socarre, Quebrada 

 Salvajin), and northern Antioquia in the lower Cauca Valley (El 

 Pescado), and the valley of the Rio Nechi (Regeneration, El Real, 



