FAMILY TYRANNIDAE 407 



wing 76.1-81.5 (78.5), tail 56.2-64.2 (61.3). culmen from base 19.6- 

 20.1 (19.8), tarsus 17.8-18.1 (18.0) mm. 



Resident. Uncommon ; found locally on the Pacific slope in eastern 

 Province of Panama, near Tocumen, on Cerro Azul, near Chepo, and 

 on the Rio Chiman ; in Darien, on Cerro Sapo, and near Jaque ; on the 

 Caribbean slope recorded on Barro Colorado Island, near Gamboa, 

 and at Achiote, Canal Zone, and Rio Piedras, eastern Colon. 



The type of the subspecies alhovittatus, named by George N. 

 Lawrence, was collected by McLeannan and Galbraith on the Carib- 

 bean slope of the Canal Zone. E. O. Willis has seen it at Gigante 

 Bay on Barro Colorado Island, and J. H. Karr and others found 

 it in the Navy Pipeline area near Gamboa. Eisenmann recorded it in 

 1969 on the Achiote road west of the Canal, near the boundary with 

 western Colon. Records supplied by Eisenmann report it as found 

 regularly near Rio Piedras on the Canal Zone boundary with eastern 

 Colon. E. S. Morton collected one at 760 meters on Cerro Azul. 

 January 6, 1966. 



On the Pacific slope Eisenmann found a pair for several years near 

 the Tocumen airport. A male in the Peabody Museum was collected 

 by Austin Smith at San Antonio on the lower Rio Bayano east of 

 Chepo. On February 27, 1950, where the Rio Corotu enters the 

 Rio Chiman, above Chiman, Panama, I found a male and two females 

 in active mating displays. All three called with much noise. The 

 male in level flight produced a loud rattling sound by vibrating the 

 wing suddenly. At rest, it held the wings partly spread and moved 

 them tremulously. One was taken in 1941 on the Eifth Vanderbilt 

 Expedition at about 900 meters on Cerro Sapo above Garachine. 

 Darien (Bond and de Schauensee, Acad. Nat. Sci. Philadelphia, Mon. 

 6, 1944. p. 37). March 10, 1950. I collected one in forest at 300 

 meters elevation on the base of Cerro Chucanti. At Charco del Toro, 

 on the head of tidewater on the Rio Maje at the end of March several 

 were noted along the banks of the river. 



The nominate race Coryphotriccus parvus parvus found in the 

 Guianas and northern Brazil differs in having the throat yellow, like 

 the rest of the underparts, instead of white as in alhovittatus. Haver- 

 schmidt (Auk, 1957. p. 241) on September 2, 1956, near Zanderij, 

 Surinam, found a nest in an old woodpecker hole near the top of a tall 

 dead tree. When this trunk had been felled and opened, he found a 

 "neatly built nest made of dry grasses, which filled the bottom of the 

 hole." It held two eggs, one of them broken. "The shell was rather 

 glossy, of a cream color, and covered all over with streaks and blotches 



