406 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



The food of the boat-bill is larger insects, which it picks usually 

 from twigs and leaves, and berries secured in the same manner. They 

 are said also to eat small lizards and minnows. 



The fact that these are forest birds, resting and moving among 

 twigs and leaves, should be kept in mind in selecting specimens for 

 measurements as wing and tail feathers become abraded at the tip. 

 The wing tip especially may become definitely shortened. True size 

 is obtained only from specimens that are not worn. 



Mcgarynchus pitaugna as a species has wide distribution from 

 Mexico through Central America and South America to Paraguay and 

 northern Argentina. Ridgway (U.S. Nat. Mus. Bull. 50, pt. 4. 1907, 

 p. 666) called attention to larger size in northern birds compared to 

 those of South America. Those of Panama have the dimensions of the 

 northern group, which continues through Darien and San Bias into 

 northwestern Colombia. Other subspecies based on slight differences 

 in color have been named from limited areas in western Mexico, 

 Guatemala, and western Ecuador. 



CORYPHOTRICCUS PARVUS ALBOVITTATUS (Lawrence): 

 White-ringed Flycatcher, Atrapamoscas Corona Anillada 



Pitangus alboz'ittatus Lawrence, Ibis, vol. 4. January 1862, p. 11. (Atlantic 

 slope, line of the Panama Railroad, Canal Zone, Panama.) 



Rather small ; white throat, yellow breast ; a conspicuous white line 

 above eye and around back of head. 



Description. — Length 145-155 mm. Male, crown sooty brown 

 (almost black); a large central crown patch of orange-yellow; a 

 broad white stripe from the forehead, above the eye, where it becomes 

 wider and encircles the back of the head ; side of head from lores 

 to the auricular region deep blackish brown, like crown ; side of 

 hindneck, back, rump, and upper tail coverts grayish olive-green ; 

 tail dark grayish brown, with the rectrices edged faintly with light 

 grayish brown ; wings dusky, with innermost secondaries edged with 

 white; chin and upper throat white; rest of under surface and under 

 wing coverts yellow, darker on the abdomen and under tail coverts ; 

 inner margin of underside of wing feathers edged narrowly with dull 

 white. 



Adult female, crown patch light yellow, otherwise like male. 



Measurements. — Males (3 from Province of Panama and Colom- 

 bia), wing 80.4-82.6 (81.4), tail 62.4-63.9 (63.2), culmen from base 

 19.2-20.0 (19.5), tarsus 18.0-18.8 (18.4) mm. 



Females (4 from Province of Panama, Darien, and Colombia), 



