366 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



Along the Rio Chiriqui Viejo, beginning in 1955, I have seen 

 them regularly at the bridge over the main highway leading west 

 toward Costa Rica, as well as near the river. At the bridge they 

 nested underneath, on the timbers that supported the flooring. Later, 

 below Cerro Punta, at Glen Lewis' house beside the river, I saw a 

 nest built beneath the eaves of a small building. At Palo Santo, 

 phoebes came regularly from the main river to the pond fed by a 

 small stream near our house. Here in early March they examined 

 the eaves of the buildings for nest sites. They were noticed also in 

 this general area at the Rio Colorado farther west. 



SAYORNIS NIGRICANS ANGUSTIROSTRIS Berlepsch and 



Stolzmann 



Sayornis cincracea angnstirostris Berlepsch and Stolzmann, Proc. Zool. Soc. 

 London, no. 23, part 2, August 1, 1896, p. 357. (La Merced, Peru.) 



Characters. — White edging on wings and tail extensive ; more 

 white on abdomen. 



A female, collected on the Rio Boqueron, back of Madden Lake, 

 February 23, 1961, had the iris dark brown ; bill, tarsi, and feet black. 

 Another of this sex at the old Tacarcuna village site, March 12, 1964, 

 had the iris brown ; maxilla black ; tip of mandible fuscous, base dull 

 brownish white ; gape and inside of mouth honey yellow ; tarsus, toes, 

 and claws black. 



Measurements. — Males (10 from Colon, Darien and Colombia), 

 wing 83.0-89.0 (86.5), tail 73.1-78.9 (76.2, average of 9), culmen 

 from base 17.7-20.0 (18.7), tarsus 18.2-19.5 (18.8) mm. 



Females (10 from Colon, Province of Panama, Darien, and 

 Colombia), wing 78.6-83.6 (80.9), tail 67.6-72.8 (70.1), culmen 

 from base 16.5-18.9 (17.5), tarsus 16.5-17.8 (17.3) mm. 



Resident. Found locally from Cerro Bruja, eastern Province of 

 Colon, Rio Boqueron, in the lower Chagres Valley, and Cerro 

 Chucanti, eastern Panama, east to Cerro Pirre, and the base of Cerro 

 Tacarcuna, Darien. 



This bird, more heavily marked with white on wings and tail 

 than the race of the west, was taken by Goldman on June 9, 1911, on 

 the Rio Cascajal, on the north base of Cerro Bruja, Colon. On the 

 Rio Boqueron, Colon, north of the Peluca Hydrographic Station, on 

 February 23, 1961, I collected a female and on the following day a 

 male. These are the most western records in the Republic for this 

 subspecies. On March 15, 1950, we saw two and secured a fully 

 grown immature on the Ouebrada Chucanti, on the south base of this 



