FAMILY TYRANNIDAE 569 



small tropical flycatchers that search for food through branches and 

 leaves, in contrast to those that wait quietly for passing insects. 

 Although they take some insects, they also feed extensively on small 

 berries. In the more humid areas of the Caribbean part of the range 

 they may be found in heavy forest, often in the high tree crown. 



Birds taken in March frequently were in breeding condition. Once 

 on March 24, 1958, at La Jagua, east of Pacora, a male fed a berry 

 to a smaller companion that I assumed to be his mate. On March 8, 

 1960, I collected a mated pair near Alanje in western Chiriqui. 

 Haverschmidt (Condor, 1956, pp. 139-141) described the nest of the 

 closely related Camptostoma o. napaeum in Surinam as a rounded 

 ball with an entrance in one side, placed among vines or otherwise 

 concealed. The set of eggs usually numbers two, in color "creamy 

 white with a number of lilac and reddish brown spots especially at 

 the larger end." Measurements of four eggs ranged as follows: 

 16.2-16.7 X 12.3-12.8 mm. One fresh egg weighed 1.35 grams. A 

 female that I shot March 13, 1960, at the Canta Gallo bridge below 

 Alanje held a fully developed egg, unfortunately broken, so that I 

 was able to determine only that it was white with a few dots of 

 cinnamon-brown. On March 9, 1949, an adult fed a fully grown 

 young bird in a bush back of the laboratory on Barro Colorado Island. 

 We have immature birds, marked by cinnamon-buff wing bars, taken 

 as follows: Alanje, March 3; Parita, Herrera, March 22; Chico, 

 Panama, March 24; Lion Hill, Canal Zone, April 4; and Gatun, 

 Canal Zone, April 6. 



While Sclater and Salvin do not give a definite locality, their type 

 specimen was part of a collection taken by James McLeannan near 

 the Lion Hill Station on the Panama Railroad, which has been desig- 

 nated as the type locality. 



CAMPTOSTOMA OBSOLETUM ORPHNUM Wetmore 



Caviptostoma obsoletum orphmim Wetmore, Smithsonian Misc. Coll., vol. 134, 

 no. 9, July 8, 1957, p. 70. (Isla Coiba, Panama.) 



Characters. — Similar to C. o. flaviventre, but with upper surface 

 darker, more olive, especially on the crown. 



Measurements. — Males (2 from Isla Coiba), wing 52.0 52.1, tail 

 39.2, 39.3, culmen from base 9.9, 10.1, tarsus 13.2, 13.9 mm. 



Females (2 from Isla Coiba), wing 47.1, 47.2, tail 35.0, 35.2, culmen 

 from base 9.7, 10.4, tarsus 13.6, 14.0 mm. 



Range. — Isla Coiba ; Isla Afuerita (adjacent to Isla Canal de 

 Afuera, between Coiba and the mainland). 



These little flycatchers are so small, and so quiet in mannerisms 



