194 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



lores and space around eye bare as in female ; greater wing coverts 

 slaty-brown without white tips ; otherwise like adult male. 



As a species, this bird is found in lowland forests from southern 

 British Honduras through the Caribbean slope of Guatemala, Hon- 

 duras, and Nicaragua. In Costa Rica it ranges also on the Pacific 

 slope and continues in Panama into Colombia through Choco (to 

 Punto Muchimbo, Valle, on the Rio San Juan) and the Sinu Valley 

 to the middle Magdalena, including the Santa Marta lowlands. 



Four geographic races currently are recognized, based on the depth 

 of color in the female, G. n. santamartae of Colombia being the 

 palest member of the series. Three of the forms are found in 

 Panama. 



GYMNOCICHLA NUDICEPS ERRATILIS Bangs 



Gymnocichla nudiceps erratilis Bangs, Auk, vol. 24, no. 3, July 1907, p. 297. 

 (Boruca, Rio Terraba Valley, Pacific slope, Costa Rica.) 



Characters. — Male, with white tipping on the wing coverts narrow ; 

 female brighter, more cinnamon-brown above, with brown brighter, 

 lower surface generally similar to the following race (chiroleuca) ; 

 concealed white on back reduced or absent. 



Measurements. — Males (10 from Chiriqui and Veraguas), wing 

 74.5-79.2 (76.4), tail 54.0-60.5 (57.8), culmen from base 20.5-23.1 

 (21.8), tarsus 29.4-32.2 (30.7) mm. 



Females (10 from Chiriqui and Costa Rica), wing 72.2-75.1 

 (73.4), tail 54.3-59.8 (57.7), culmen from base 21.0-22.6 (21.7), 

 tarsus 29.2-30.8 (30.1) mm. 



Resident. Uncommon in the lowlands of Chiriqui, east to the valley 

 of the Rio San Felix. 



The earliest record is by Salvin (Proc. Zool. Soc. London, 1870, 

 p. 195) who received two males and two females taken by Arce in 

 1869 at Bugaba and Mina de Chorcha. I have seen these in the 

 British Museum, and also another Arce specimen dated 1870, 

 marked only as from the southern slope of the volcano. Sclater 

 (Cat. Birds Brit. Mus., vol. 15, 1890, p. 189) in error Hsted this as 

 "specimen g" under Thamnophilus Unmaculatiis. Bangs (Auk, 1901, 

 p. 366) lists seven males in the collection made by W. W. Brown, 

 Jr., at Divala from October to December 1900. Two of these are now 

 in the National Museum. Two females in the California Academy of 

 Sciences were taken in Chiriqui by Mrs. M. E. Davidson at Con- 

 cepcion on December 10,1929, and near San Felix on December 3, 



