238 BIRDS OF THE REPUBLIC OF PANAMA PART 4 



in northern Colombia and ranges across Venezuela from the Orinoco 

 Valley to the north coast, including Margarita Island, and the island of 

 Tobago. The subspecies found in Panama are separated widely from 

 those of Colombia and Venezuela by the forest of Darien and the Atrato 

 Basin. 



The bird of Panama is much brighter colored above and below than 

 its more eastern (South American) relatives and in fact is so different 

 that the decision to place it as a geographic race instead of a distinct 

 species is more or less an arbitrary one, based on general similarity and 

 its allopatric range. 



Figure 21. — Scrub Greenlet, Verdecillo Rastrojero, Hylophilus flavipes. 



HYLOPHILUS FLAVIPES VIRIDIFLAVUS Lawrence 



Hylophilus viridiflavus Lawrence, 1862, Ann. Lyc. Nat. Hist., New York, 7 (1861), 

 p. 324. (Atlantic slope near Panama Railroad, Canal Zone, Panama, hereby 

 restricted to Frijoles, Canal Zone.) 



Hylophilus viridiflavus pallescens Davidson, 1932, Proc. Washington Biol. Soc, 

 vol. 45, p. 168. (Concepcion (1500 ft), Chiriqui, Panama.) 



Characters. — Undersurface light yellow. 



A male collected January 15, 1955, at Juan Mina, Canal Zone, had 

 the iris cadmium yellow, bill light hair brown; line of culmen fuscous; 

 tarsus, toes, and claws light yellowish brown. A male collected March 

 24, 1961, at Chico, Panama, had the iris pale yellowish white; maxilla 

 except cutting edge mouse brown; mandible and cutting edge of maxilla 



