FAMILY FURNARIIDAE 67 



Male and female, taken at Chitra, February 13 and March 13, 

 1926, by R. R. Benson, are slightly darker than those from Chiriqui. 



These properly are birds of forest or forest edge, but sufficiently 

 adaptable to range also in low or tall second growth, or in border 

 thickets. Less often they are seen in the tree crown in higher forest. 

 They are found alone, or in pairs in the nesting season (which ap- 

 pears to begin in February) ; rarely with the small flocks of forest 

 species that feed in company. They move quietly but actively, climb- 

 ing through masses of creepers or over small branches. In general 

 they are silent, only occasionally giving low, somewhat harsh calls. 



On March 17, 1960, beyond the Quebrada Barriles, near the Rio 

 Chiriqui Viejo below El Volcan, I found a pair at a ball-shaped nest 

 swinging at the end of a creeper 10 meters from the ground in high 

 second growth. I had hoped that this was in use, but found it 

 empty, and so loosely made that it fell apart when I attempted to 

 collect it. 



In the mountains of Costa Rica. Skutch (Pac. Coast Avif. no. 35, 

 1969, pp. 331-334) found two nests, both large rounded structures, 

 built of green moss, suspended from the ends of drooping branches 

 well elevated above the ground. Each had an entrance near the 

 bottom. Both members of the pair worked at nest-building, incuba- 

 tion, and subsequent care of the young. He was unable to reach the 

 nest to examine the eggs. 



CRANIOLEUCA ERYTHROPS GRISEIGULARIS (Ridgway) 



Acrochilus erythrops griseigularis Ridgway, Proc. Biol. Soc. Washington, vol. 

 22, April 17, 1909, p. 72. (San Antonio, 5800 feet, Rio Cali, Valle, Colombia.) 



Characters. — Darker ; crown deeper reddish brown, this color, 

 which forms a cap, extended slightly farther posteriorly to the upper 

 margin of the hindneck ; central tail feathers somewhat more reddish 

 brown ; somewhat paler underneath. 



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

 wing 64.6-71.0 (67.2), tail 62.3-67.7 (64.2, average of 9), culmen 

 from base 13.1-15.2 (14.2), tarsus 18.7-19.8 (19.2) mm. 



Females (10 from western Colombia), wing 60.3-64.7 (63.3), tail 

 53.9-63.6 (60.1, average of 9), culmen from base 12.7-15.2 (14.5), 

 tarsus 18.1-19.2 (18.6) mm. 



Resident. Known in Panama from two specimens, a male from 

 Cerro Mali at 1460 meters, and a female from Cerro Pirre at 1580 

 meters. 



