FAMILY TROGLODYTIDAE 



117 



iris reddish brown; basal area of mandible dark neutral gray; rest of 

 bill black; tarsus and toes fuscous-black; claws fuscous-brown. 



Measurements. — Males (10 from Cerro Azul and the Tacarcuna 

 massif, Panama, and western Antioquia, Colombia), wing 54.4-60.0 

 (56.6), tail 26.7-30.5 (28.8), culmen from base 15.7-19.6 (17.9), tar- 

 sus 23.7-25.1 (24.8) mm. 



Females (10 from Darien, and from Antioquia and Cauca, western 

 Colombia), wing 50.8-55.1 (52.5), tail 25.1-27.8 (25.8), culmen from 

 base 15.8-17.4 (16.7), tarsus 22.0-23.8 (22.8) mm. 



Resident. Found locally on Cerro Azul, eastern Province of Pan- 

 ama; fairly common on Cerro Tacarcuna and on Cerro Pirre, Darien. 

 Elsewhere, it occurs on the slopes of the Andes of Colombia, Ecuador, 

 and Peru. 



The Gray-breasted Wood-Wren, less abundant than the white- 

 breasted species, is found in mountain forests, possibly more commonly 

 than the few records available indicate. On Cerro Azul (March 29, 

 1955) I found 1 specimen at 850 m elevation, in the more humid forest 

 on the high slopes where the damp winds from the north and east swept 

 across the summit. One had been taken here earlier on March 25, 191 1, 

 by E. A. Goldman. The bird may be more common there than these re- 

 ports indicate. Ridgely (in litt.) notes that he and others have found it 

 on Cerro Azul in recent years. 



In the extensive forests on Cerro Tacarcuna, Darien, this species was 

 fairly common. In February and March 1964, I collected 1 at the lower 

 level camp, and others higher up, near the summit, at 1400 m. On Cerro 

 Pirre, Goldman, from March to early June, found them more common, 

 as he prepared 8 for specimens, taken at 5000 m near the head of Rio 

 Limon. 



The population found in the mountains of eastern Panama is identi- 

 fied as the nominate subspecies leucophrys, with its type locality in 

 Peru, in accordance with the detailed studies of Hellmayr ( Journ. fur 

 Ornith., 1903, p. 531, and Cat. Birds Amer., pt. 7, 1937, pp. 262-264). 



CYPHORHINUS ARADUS (Hermann); Song Wren, Cucarachero Cantor 



Myrm[ornis] arada Herman, Tab. Aff. Anim, 1783, p. 211 (note r). 



Medium size; bill strong, compressed from side to side, with slightly 

 raised base above nostrils; throat, upper breast, and side of head chest- 

 nut; upper surface very dark brown; wings and tail heavily barred 

 with black. 



Description. — Length 115-130 mm. Upper surface deep brown to 



