490 BIRDS OF THE REPUBLIC OF PANAMA — PART 2 



Rio Pequeni, March 4, 1961, had the iris dark wood brown ; basal half 

 and tip of the line of the culmen fuscous-black; rest of bill rather 

 dull red ; tarsus dusky neutral gray ; toes and claws black. 



Resident. Fairly common over the Cerro Azul, ranging to the 

 eastern end above the Rio Mamoni, and to near the lower Rio Bayano 

 back of Chepo; found also on the lower Rio Boqueron and the Rio 

 Pequeni above Madden Lake. 



Two seen, possibly accompanied by others, were whistling and 

 calling on Wheeler trail, Barro Colorado Island, April 6, 1950. On 

 March 18, 1952, I noted several at Chilar on the lower Rio Indio, 

 Colon. 



Three females, including the bird taken by Goldman on Cerro Azul 

 March 24, 1911, which Nelson described as Monasa similis, and 2 

 that I collected on the Zanja Limon above the Rio Mamoni, back of 

 Chepo, have the throat black instead of white. Otherwise they are 

 like typical fidelis. They are considered to be intergrades toward 

 pallescens, found farther east, back of Chiman. 



MONASA MORPHOEUS PALLESCENS Cassin 



Monasa pallescens Cassin, Proc. Acad. Nat. Sci. Philadelphia, I860, p. 134. 



(Mountains on the Rio Truando, Choco, Colombia.) 

 Monasa pallescens minor Nelson, Proc. Biol. Soc. Washington, vol. 26, March 



22, 1913, p. 67. (Marraganti, Darien, Panama.) 



Characters. — Throat black ; wing coverts light slate to pale gray ; 

 black extending farther down on breast ; averaging slightly paler gray 

 above and below than fidelis; rarely with a little white mixed with the 

 black on the chin (seen in a male from the Rio Tacarcuna, Darien). 



A male, taken at Boca de Paya, Darien, February 21, 1959, had the 

 iris bright brown ; bill deep red ; tarsus and toes dark neutral gray ; 

 claws dull black. 



A female, collected at Armila, San Bias, March 6, 1963, had the iris 

 warm brown ; bill red ; tarsus dark neutral gray ; toes fuscous-black ; 

 claws black. 



Measurements. — Males (11 from Panama), wing 130.1-141.9 

 (134.4), tail 114.7-130.8 (121.4), culmen from base 37.2-42.0 (39.6), 

 tarsus 19.8-22.6 (21.1) mm. 



Females (13 from Panama), wing 135.3-141.8 (138.0), tail 120.0- 

 129.6 (124.5), culmen from base 37.3-43.1 (40.5), tarsus 20.1-22.0 

 (21.3) mm. 



Resident. Fairly common in forest areas from the Rio Chiman, 

 eastern Province of Panama east through Darien ; also on the head- 



