FAMILY TYRANNIDAE 413 



21.7x16.2. 21.8x15.5 mm; set of four (one broken) 21.5x16.1, 

 21.9x16.8, 22.9x16.5 mm; set of three 22.2x16.5, 22.9x16.3, 

 23.4x16.5 mm. At hatching the young are covered scantily with 

 light gray down. 



Nest-building and inculcation fall to the female alone, but with 

 the male in close attendance. In due course he shares in feeding the 

 young. The latter may remain with the parents when fully grown 

 so that from five to six individuals may be associated for a period 

 in loose company. Skutch has recorded young out of the nest, but 

 still under parental care roosting "in a compact row on an exposed 

 twig of a guava tree." Hallinan (Auk, 1924, p. 318) recorded a nest 

 at Gatun built on the same limb with one of the Yellow-bellied 

 Elaenia. At the border of the marsh at La Jagua in the savannas 

 east of the Rio Pacora, I found a nest of this species and one of the 

 Rusty-margined Flycatcher located only 4 meters apart in the open 

 branches of a small tree. The two nests were similar in form but 

 that of the present species was about one-third less in bulk. 



While these are active flycatchers of flying prey, around houses 

 with lawns they come regularly to the ground and hop slowly, 

 peering about, often with the tail cocked over the back, searching 

 for spiders and insects. They also have this habit of ground feeding 

 on open gravel bars in streams. A considerable part of their food 

 is taken from the berries of the royal palm, and they are regular 

 visitors to other fruiting trees in the forest edge. Skutch (loc. cit., 

 p. 428) recorded that at open stream borders they may "venture 

 into shallow pools up to their thighs to catch small tadpoles." 



Some examined from the Cauca and northern Magdalena valleys 

 across to northern \^enezuela are very slightly darker above than 

 the average of those of Panama, but many from both series are 

 too similar to allow clear separation in two subspecies. Size also 

 is almost identical. The darker shade in the few from Colombia 

 and Venezuela appears as a faint variation toward the darker dorsal 

 coloration of the nominate race shnilis found from southeastern 

 Colombia and southern Venezuela to the Guianas and northeastern 

 Brazil. 



MYIOZETETES GRANADENSIS Lawrence: Gray-capped 

 Flycatcher, Papamoscas Copete Gris 



Rather small ; breast yellow ; forehead and a superciliary extend- 

 ing only slightly behind eye, white ; crown gray ; lores and side of 

 head slaty-black ; wing edging olive. 



Description. — Length 150-165 mm. Adult male, crown and hind- 



