352 BIRDS OF THE REPUBLIC OF PANAMA — PART 3 



hergi of southwestern Colombia (Narino) and northern Ecuador, also 

 is dark, but has wings and tail more olive-gray, less rufescent, the 

 throat paler, less rufescent, and is somewhat smaller. 



On Cerro Mali and the adjacent slopes of Cerro Tacarcuna these 

 birds were fairly common, often in or near areas of cloud forest. 

 They ranged in fairly dense undergrowth, perching amid the lower 

 stands, but well above the ground. Several were captured in mist 

 nets. Their call was a three-noted tsick-szveet-tsee, given slowly with 

 a 2-second interval between the separate notes. 



One had eaten a large orthopteran. The stomach of another held 

 finely ground insect remains that I did not identify. 



The considerable change in color in museum specimens of Scliif- 

 fornis turdiniis, through which the birds become darker, apparently 

 has been responsible, in part at least, for confusion in understanding 

 the variation found in this species through the Isthmus of Panama. 

 The difficulty began when Hellmayr, in his review (Cat. Birds 

 Amer., Part 6, 1929, p. 85), listed the subspecies dumicola, described 

 by Bangs in 1903, as not separable from the population veraepacis 

 of farther north in Central America. He then used the next available 

 name fiirvus, a synonym of dumicola, named in 1906 by Ridgway, 

 for the birds of western Panama and of the eastern mountains. At 

 the same time he described the paler lowland form of the eastern 

 lowlands as a separate race panamensis. 



When the first collections from Darien including this species came 

 to hand, it was not recognized that the series from that area included 

 both the lowland panamensis from the foothill area, and a darker 

 form from the higher levels, so that all were labeled as identical with 

 the birds of the western Panamanian highlands. 



The name for this race has been taken from the Greek acrolophites. 

 a mountaineer. 



Specimens examined in comparisons: 



Schiffornis turdimis veraepacis. Guatemala — Peten : Remate, c?; Santa Rita, c^; 



Laguna Sos, 2 c?. Honduras — Chamelicon, $; Santa Ana, 9; San Pedro Sula, 



c?. Costa Rica — Jimenez, c?, $ ; Angostura, $ ; Cervantes, c?. 

 Schiffornis turdinus dumicola. Panama — Chiriqui : Santa Clara, S ; El Volcan, 



2 <S. Veraguas : Rio Calovevora, 39 ; Puerto Vidal, c? ; Sona, ? ; Santa Fe, 3^", 



$; Chitra, c? (type of furvus Ridgway). Code: Head of Rio Guabal, c?; 



Cascajal, tj*. 

 Schiffornis turdimis panavtensis. Panama — Canal Zone : Juan Mina, c^, ?. 



Province of Panama: La Jagua, cT, $; Canita, c?; Chepo, 2$; Chiman, $; 



Charco del Toro, c^, $. Colon: Portobelo, ^. Darien: Yaviza, d' ; Boca de 



