408 birds' of the republic of PANAMA PART 3 



of chocolate brown, which formed an unbroken, soHd, broad ring 

 around the large end." The egg measured 20.8x16.0 mm. 



The genus Coryphotriccus was named by Ridgway (Proc. Biol. 

 Soc. Washington, vol. 19. September 6, 1906. p. 115) with albovittatus 

 Lawrence, as type. In later, more detailed consideration Ridgway 

 (U.S. Nat. Mus. vol. 50. pt. 4, 1907, p. 668) pointed out that it was 

 "more nearly related to Conopias but bill relatively much larger 

 (exposed culmen equal to or slightly longer than tarsus)." On com- 

 parison it will be seen that the bill not only is larger, but also is con- 

 siderably more robust in form, with the opening of the nostril more 

 rounded, though the bird as a whole is smaller. The general pattern 

 of color and markings is closely similar in these two, except that in 

 Conopias there is no colored crown patch. Hellmayr (Cat. Birds 

 Amer.. Pt. 5. 1927, pp. 136-137) recognizes the genus in listing three 

 races of Coryphotriccus parvus. The proposal of de Schauensee 

 (Spec. Birds South Amer.. 1966, p. 347) to place it in Conopias on 

 the basis of what is said above does not appear valid. 



MYIOZETETES CAYANENSIS HARTERTI Bangs and Penard: 

 Rusty-margined Flycatcher, Papamoscas Alicastano 



Myiosetctes cayanensis hartcrti Bangs and Penard. Bull. Mus. Comp. Zool., 

 vol. 6. January 1921, p. 374. (Lion Hill, Canal Zone, Panama.) 



Rather small ; breast yellow ; crown and side of head black, with a 

 prominent white superciliary extending back to side of hindneck; 

 wings edged with rufous ; crown patch orange and yellow. 



Description. — Length 145-155 mm. Adult (sexes alike), crown 

 and side of head brownish black; forehead gray mixed with white; 

 a broad white superciliary stripe extending back to side of nape; a 

 large, partly concealed crown patch of bright orange, becoming 

 yellow on the sides and basally ; hindneck, back, scapulars, rump, 

 upper tail coverts, and lesser wing coverts plain olive ; rest of wings 

 and tail grayish brown ; primaries and outer secondaries edged with 

 cinnamon-rufous ; larger wing coverts, inner secondaries and rectrices 

 edged with light olive ; chin and throat white ; rest of under surface, 

 including the axillars and under wing coverts bright yellow ; inner 

 edge of wing feathers cinnamon. 



Young, crown plain brownish black, with no bright-colored crown 

 patch ; wings, including the coverts, tail, and upper tail coverts edged 

 heavily with cinnamon-rufous ; otherwise like adult. 



In male and female, the iris varies from wood brown to mouse 

 brown ; bill, tarsus, toes, and claws are black. 



