602 BIRDS OF THE REPUBLIC OF PANAMA PART 4 



pt. 28, 1884, p. 324) found a nest containing young in May 1873 in the 

 forest near Obispo Station, now in the Canal Zone. Olson found a nest 

 containing two fresh eggs on June 30, 1966, at Curundu, Canal Zone, 

 and W. W. Brown, Jr., collected 1 in nestling plumage at Divala, Chiri- 

 qui on October 27, 1900 (Bangs, Auk, 1901, p. 369-370). In Costa 

 Rica, Skutch (Pac. Coast Avif. no. 31, 1954, pp. 94-100) has found it 

 nesting between April and September. The nest is a bulky, oven-shape 

 structure made of dead leaves, rootlets, sticks, and live, green ferns 

 that help conceal it amid the living vegetation on the ground in which 

 it is placed; the nest is lined with fine, light-colored rootlets. It is often 

 placed on a slope and may have a platform to its side entrance as well 

 as a runway of broken pieces of green fern. The nest may measure as 

 much as 20 cm in external diameter. The inside is 12.7 cm from front 

 to back, 9 cm across, and 10 cm high. Skutch found two eggs or nest- 

 lings in each of the thirteen nests he discovered; the eggs are white and 

 moderately glossy, varyingly marked in dark or light brown or black, 

 varying from a few fine dots scattered over the blunt end to a sprinkling 

 over the entire surface or a wreath of black spots around the blunt end. 

 Average measurements are 25.4x17.3 mm. Incubation is performed 

 entirely by the female and requires 14 to 17 days. Both parents feed 

 insects to the young, which are born with pinkish skins and long, dark 

 gray down. When about 13 days old, the young are well feathered and 

 leave the nest. 



ARREMON AURANTIIROSTRIS STRICTOCOLLARIS Todd 



Arremon aurantiirostris strict ocollaris Todd, 1922, Proc. Biol. Soc. Washington, 

 35, p. 90. (Sautata, Rio Atrato, Choco, Colombia.) 



Characters. — Upper surface darker, more olivaceous than in nomi- 

 nate aurantiirostris; bend of wing orange-yellow, not yellow as in nomi- 

 nate aurantiirostris. 



A male collected at Tacarcuna Village, Darien, on March 5, 1964, 

 had the iris dark brown; bill orange; tarsus and toes pale brownish 

 white; claws slightly darker. 



Measurements. — Males (10 from Darien), wing 73.0-80.0 (76.0), 

 tail 57.7-69.0 (64.1), culmen from base 14.8-16.7 (16.1), tarsus 24.0- 

 27.0 (25.2) mm. 



Females (7 from Darien and San Bias), wing 71.0-73.0 (72.0), tail 

 57.3-60.9 (59.5), culmen from base 15.0-15.8 (15.4), tarsus 23.8-26.7 

 (25.4) mm. 



Resident. Fairly common in Darien and San Bias. In Darien, I 

 have collected it at Jaque, Rio Jaque, Tacarcuna Village, La Laguna, 



