FAMn.Y FORMICARIIDAE 217 



Characters. — Paler, more bufify brown above; black of upper 

 surface of tail restricted to distal half ; side of head and neck, and 

 upper and under tail coverts, lighter, brighter brown. 



A male taken near the Candelaria Hydrographic Station on the Rio 

 Pequeni, above Madden Lake, in eastern Province of Panama, 

 March 3, 1961, had the iris wood brown; bill black; tarsus, toes, 

 and claws light fuscous-brown. Another from Armila, San Bias, 

 collected February 27, 1963, had the iris warm mouse brown ; bill 

 black; tibiotarsal joint distinctly white, in contrast with the light 

 dull brown of the tarsus and toes ; claws neutral gray. 



A female, from La Jagua, eastern Province of Panama, January 14, 

 1962, had the iris dark reddish brown; bill black; tarsus mouse 

 brown ; toes and claws somewhat darker. 



Measurements. — Males (10 from Code, Colon, Province of 

 Panama, Darien, and San Bias), wing 87.0-90.5 (89.0), tail 46.0-52.8 

 (48.9), culmen from base 20.5-22.7 (21.7), tarsus 30.2-34.1 

 (32.7) mm. 



Females (10 from Code, Colon, Canal Zone, Province of Panama, 

 Darien, and San Bias), wing 83.1-89.8 (86.4), tail 41.9-52.3 (47.6), 

 culmen from base 20.^23.4 (22.1), tarsus 31.0-34.5 (32.7) mm. 



R. S. Crossin recorded the weight of a male taken August 10, 

 1968, as 54.1 grams (without fat). 



Resident. Fairly common in lowland forests on the Pacific side 

 from eastern Code (El Valle) through Darien; on the Caribbean 

 slope from northern Code (El Uracillo) and western Colon (Rio 

 Indio) east through San Bias to the Colombian boundary; to 500 

 meters on Cerro Pirre, and to 600 meters in other mountain areas. 



From available data there is a gap in the distribution of this ant- 

 thrush on the Pacific slope from central Chiriqui to Code, including 

 the Azuero Peninsula. Salvin (Proc. Zool. Soc. London, 1866, p. 74) 

 reports that "a young bird from Veragua exhibits the precise plumage 

 of the adult," and (idem, 1867, pp. 145-146) lists a specimen in the 

 first Arce collections from Panama as from "Santiago de Veragua." 

 This record, repeated by Salvin and Godman (Biol. Centr.-Amer., 

 Aves, vol. 2, 1892, p. 235), is open to question. In regard to this it 

 may be noted that Sclater (Cat. Birds Brit. Mus., vol. 15, 1890, 

 p. 304) under "Formicarius hoffmanni" from the Salvin-Godman 

 collection, lists "e. J* jr. sk. Chepo, Panama." Arce's first collections 

 in Panama were made at Chepo from late 1864 to 1865, so that it 

 seems probable that the "Veragua" report may be based on the Chepo 

 specimen mentioned. In my own field work this bird was recorded in 



