FAMILY TROGLODYTIDAE 



71 



THRYOTHORUS LEUCOTIS CONDITUS (Bangs) 



Thryophilus galbraithi conditus Bangs, Proc. New England Zool. Club, vol. 4, 

 March 16, 1903, p. 3. ("San Miguel Island, Gulf of Panama" = Isla del Rey, 

 Archipielago de Las Perlas, Panama.) 



Characters. — Similar in general to T.l. galbraithii but darker brown 

 on the dorsal surface, sides, lower abdomen, and undertail coverts; 

 slightly larger. 



Measurements. — Males (10 from Islas del Rey and Canas), wing 

 64.1-70.8 (67.0), tail 41.7-46.0 (44.0), culmen from base 19.1-21.2 

 (20.3), tarsus 23.4-25.3 (24.5) mm. 



Females (10 from Islas del Rey and Canas), wing 60.2-66.5 (63.3), 

 tail 39.0-44.2 (41.6), culmen from base 18.2-20.8 (20.1), tarsus 23.4- 

 25.0 (24.2) mm. 



Resident. Found on Islas Rey, Viveros, Puercos, and Canas, Archi- 

 pielago de las Perlas. 



This subspecies, marked by its definitely darker coloration, especially 

 on the back, was described from 8 specimens collected by W. W. 

 Brown, Jr., near the town of San Miguel, on Isla del Rey in April and 

 May, 1900. On first examination of the collection, Bangs (Auk, vol. 

 XVIII, January, 1901, p. 30) listed them as "Thryophilus galbraithi," 

 noting only that they were "almost imperceptibly more reddish on the 

 back than mainland birds." Later, in more careful comparison, he 

 formally named the race. The distinction was verified through a second 

 series of 10 specimens collected by Brown on another visit in February 

 and March, 1904 (Thayer, J. E., and Bangs, O., Bull. Mus. Comp. 

 Zool., vol. 46, 1905, p. 154). H. Rendahl (Ark. f. Zool., vol. 13, no. 4, 

 1920, p. 43), in a report on a collection of birds made in the Pearl Is- 

 lands in 1882 by Carl Bovallius, listed 4 males taken (April 8 to 11) 

 on Isla Viveros, adjacent to Rey on the northwest. 



From January 21 to 23, 1960, I found these wrens common on Isla 

 Canas, adjacent to Isla del Rey on the east, and collected a series of 3 

 males and 4 females. 



As our launch lay at anchor in a sheltered bay on the south side of 

 the island on the evening of January 21, I heard an occasional song 

 that I attributed to this bird. And the following morning we found 

 them common through the rather low open forest, as well as in denser 

 growth adjacent to a mangrove swamp. The clear, ringing song, heard 

 constantly, was a rapid repetition of a single phrase. The birds were 

 common also, but more wary, on the eastern side of Isla del Rey, at 



