FAMILY RHINOCRYPTIDAE 259 



and three females at 1100 meters near Chitra, near the boundary with 

 the Province of Code. 



Zimmer (Amer. Mus. Nov., no. 1044, 1939, p. 17), from an er- 

 roneous identification of 4 specimens of S. a. argentifrons in im- 

 mature plumage from Boquete, listed birds from that locality under 

 the name "^S'. chiriquensis." Peters (Check-1. Birds World, Pt. 7, 

 1951, p. 285), although he correctly identified the material in the 

 Museum of Comparative Zoology from Boquete as argentifrons, 

 in personal conversation told Dr. Eisenmann that he had included the 

 locality Boquete also under chiriquensis from the erroneous report by 

 Zimmer. It has not yet been recorded on the adjacent mountain ridges 

 of Bocas del Toro, but is assumed to occur in that area. 



From information now available in Panama, this species ranges 

 from near the Costa Rican boundary to the mountains of Veraguas. 

 The eastern group, described in 1924 as a distinct species chiriquensis, 

 is here listed as a geographic race of argentifrons. 



SCYTALOPUS PANAMENSIS Chapman: Pale-throated Tapaculo, 

 Tapaculo de Tacarcuna 



Scytalopus pananicnsis Chapman, Auk, vol. 32, no. 4, October 4, 1915, p. 420. 

 (Head of Rio Cuti, east base of Cerro Tacarcuna, Choco, Colombia.) 



Small ; adult with a well-marked light gray superciliary, but crown 

 without gray ; brown of flanks brighter. 



Description. — Length 115-120 mm. Compared to Scytalopus ar- 

 gentifrons, bill larger ; crown plain sooty black ; superciliary much 

 paler gray ; under surface lighter gray, with flanks and abdomen 

 brighter brown. Adult male, top of head, hindneck, upper back, 

 scapulars, and wing coverts sooty black; a strongly marked, pale 

 grayish white superciliary, extending to back of crown; lower back, 

 rump, and upper tail coverts cinnamon-brown, barred narrowly with 

 sooty ; wings and tail faintly brownish black ; lores dull gray ; space 

 around eye and side of head sooty black ; foreneck and upper breast 

 plain gray ; tips of feathers of lower breast and abdomen paler, lighter 

 gray, with the darker bases partly visible, producing a mottled ap- 

 pearance ; flanks and under tail coverts cinnamon-brown barred with 

 sooty black. 



Adult female, similar, except that the back, scapulars and wings 

 are definitely browner, and the rump, flanks, and under tail coverts 

 somewhat brighter. 



No immature individuals have been seen among the more than 20 

 specimens examined. 



