570 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



that they undoubtedly are more common on Isla Coiba than is indi- 

 cated by the four specimens taken during my five weeks on the island. 

 They move quietly, usually among leaves, and when they fly dis- 

 appear at once behind cover. While I found them in low growth 

 near the beaches and along the borders of clearings, they ranged also 

 through the high tree crown of the forest. 



On Isla Afuerita, separated by a narrow channel from Isla Canal 

 de Afuera, which lies between Isla Coiba and the Veraguas mainland, 

 I collected a male on March 22, 1962, that is assigned to this sub- 

 species. It is slightly grayer on the dorsal surface, and somewhat 

 less yellow below than the type series from Coiba, but agrees with 

 them in being distinctly darker above than C. o. flaviventre of the 

 mainland. The difference equals that seen in the range of variation 

 in our extensive series of flaviventre. The bird was found in low 

 bushes at the border of an old cornfield. Its measurements are as 

 follows: wing 52.5, tail 44.0, culmen from base 9.0, tarsus 14.0 mm. 



CAMPTOSTOMA OBSOLETUM MAJOR Griscom 



Camptostoma pusillum major Griscom, Bull. Mus. Comp. Zool., vol. 72, no. 9, 

 January 1932, p. 353. (San Miguel, Isla del Rey, Archipielago de las Perlas, 

 Panama. ) 



Characters. — Similar to C. o. flaviventre, but slightly grayer, less 

 olive above, with the crown somewhat lighter, so that it is more like 

 the back. 



Measurements. — Males (8 specimens), wing 52.6-55.2 (54.2), 

 tail 37.3-45.8 (40.7), culmen from base 9.0-10.5 (9.5), tarsus 13.0- 

 14.6(13.7) mm. 



Females (5 specimens), wing 48.3-50.6 (49.1), tail 33.0-37.2 

 (35.2), culmen from base 8.6-9.5 (9.3), tarsus 13.3-14.3 (13.8) mm. 



Resident in the Archipielago de las Perlas ; recorded on Islas Rey, 

 Saboga, Pacheca, Pedro Gonzalez, and San Jose. 



This slightly differentiated race is little known except for the 

 specimens that have been taken, which come mainly from Isla del Rey. 

 I saw single individuals on three occasions on Isla San Jose in 1944 

 and 1946, but did not succeed in collecting one. A specimen in the 

 American Museum of Natural History from Isla Pedro Gonzalez 

 was taken by Griscom and Crosby on February 18, 1927. 



SUBLEGATUS ARENARUM ARENARUM (Salvin) : Scrub 

 Flycatcher, Monona Grisacea 



Elainea arcnarum Salvin, Proc. Zool. Soc. London, August 1863, p. 190. 

 (Puntarenas, Provincia de Puntarenas, Costa Rica.) 



