FAMILY TROGLODYTIDAE 



II 9 



Almirante, behind the mangrove swamps, and over the higher slopes of 

 the hills. Elsewhere, this race is reported only from Costa Rica. The 

 birds range in pairs or in small groups generally near or on the ground, 

 and sometimes into the trees. In general habits they resemble the race 

 lawrcncii, widely distributed through central and eastern Panama. 



On the Caribbean slope of Costa Rica, Skutch found the globular 

 nests, with tubular entrances, in woodland in the crotch of a sapling 

 from one to several meters above the forest floor. In February one held 

 two eggs "which were white, with brown speckles forming a wreath 

 about the thick end." This species also builds dormitory nests in which 

 members of a band sleep; they are of the same shape as breeding nests. 



The vocalizations of this population are essentially like those of law- 

 rencii, combining guttural phrases and throaty chatter and clucks with 

 musical whistles. 



A male taken at Almirante by D. Hicks (Gorgas Memorial Labora- 

 tory Collection) October 3, 1964, weighed 24.3 g. 



CYPHORHINUS ARADUS LAWRENCII Lawrence 



Cyphorhinus Lazvrencii, "sp. nov. Scl. M.S.," Lawrence, Ann. Lyc. Nat. Hist., 

 New York, vol. 8, May 1863, p. 5. (Atlantic slope, line of Panama Railroad, 

 Canal Zone, Panama.) 



Characters. — Paler in color above and on the lower surface; some- 

 what lighter brown on crown and back; lighter underneath in chestnut- 

 brown of foreneck and upper breast, and lighter, more brownish gray 

 on rest of undersurface. 



In an adult male, collected at Juan Mina, Canal Zone, January 12, 

 1961, the iris was wood brown; bill wholly black; tarsus, toes, and claws 

 fuscous. In another male, at Armila, San Bias, February 21, 1963, the 

 iris was dark brown; bill black; tarsus, toes, and claws dark olive- 

 brown. 



Measurements. — Males (10 from Colon, Province of Panama, and 

 Canal Zone) , wing 61.7-66.8 (64.0), tail 27.4-34.1 (30.2), oilmen from 

 base 19.2-22.2 (20.4), tarsus 23.1-24.8 (24.1) mm. 



Females (10 from Colon, Province of Panama, and Canal Zone), 

 wing 58.8-64.1 (61.2), tail 25.3-29.7 (27.1), oilmen from base 18.7- 

 21.0 (19.8), tarsus 21.0-25.5 (23.4) mm. 



R. S. Crossin recorded the weight of an adult male taken August 9, 

 1968, near Gamboa, as 27.4 g. One weighed by Strauch (Bull. Brit. 

 Orn. Club, 1977, p. 64) was 24.6 g. 



Resident. Fairly common, on the Caribbean side from the valley of 



