FAMILY BUCCONIDAE 485 



inner webs of primaries and secondaries at base, and under wing 

 coverts light cinnamon-buff. 



Female, slightly paler above and below. 



Juvenile, two outer rectrices lighter brown. 



A male from Boca de Paya, Darien, taken March 12, 1959, had 

 the iris dark brown; thickened margin of eyelid pale brick red; space 

 around nostril, and the mandible light neutral gray; rest of maxilla 

 and cutting edge of mandible dusky neutral gray; inside of mouth, 

 including upper surface of tongue, black; tarsus and toes neutral 

 gray ; claws black. 



A female from Juan Mina, Canal Zone, collected January 16, 1961, 

 had the line of the culmen, distal half of the maxilla, and the cutting 

 edge and tip of the mandible dull black ; rest of bill neutral gray ; tarsus 

 and toes dark greenish gray. Another of this sex from El Real, 

 Darien, January 24, 1964, had the thickened edge of the eyelid pale 

 rose-red ; tip of maxilla, and tip and cutting edge of mandible black ; 

 rest of bill neutral gray; tarsus pale dull brown. Otherwise these 

 females were like the male. 



Measurements. — Males (12 from Panama), wing 55.2-58.8 (56.9), 

 tail 52.3-58.7 (55.1), culmen from base 22.6-24.4 (23.4), tarsus 13.0- 

 14.7 (13.6) mm. 



Females (18 from Panama), wing 55.1-59.7 (57.7), tail 53.6-59.6 

 (57.2), culmen from base 22.4-25.6 (23.9), tarsus 12.2-14.2 (13.2) 

 mm. 



Minor differences between these measurements and those given 

 in the original description of N. f. stulta are due to a few additions 

 and substitutions in the series measured. 



Resident. Recorded locally on the Caribbean slope near the Rio 

 Indio in northern Code (El Uracillo), and in the lower Chagres 

 Valley in the Canal Zone; on the Pacific slope in the eastern sector 

 of the Province of Panama (Tocumen, Pacora, La Jagua, Chepo) 

 through Darien (mainly in the valleys of the Rio Sambu, the Tuira, 

 and the Chucunaque). 



These attractive little birds range in gallery forest from the under- 

 growth to the lower tree crown, and also in thickets and second growth. 

 When they have rested quietly, like the larger species of the family, 

 I have mistaken them for flycatchers. In contrast, regularly they 

 move slowly through the branches, or more actively, join the small 

 groups of forest birds that in company search quickly through the 

 cover of leaves. On such occasions their movements suggest those 

 of small ant-shrikes. The stomachs of those that I have examined 



