20 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I39 



higher branches to 2,500 feet. The divide here between this stream, 

 which flows into the Pacific, and the Rio Indio of the Caribbean side 

 is low so that rainfall in the heads of the valleys is sufficient to main- 

 tain the type of green-leaved undergrowth that these wrens frequent 

 across for a short distance on the Pacific side. The birds here do not 

 range below 2,000 feet elevation where the scrub growth changes to 

 the semiarid type characteristic of the Pacific lowlands of this area. 

 This is the only point known to me at which the race castaneus crosses 

 to the Pacific slope. Records of Salvin (1867, p. 134) and of Salvin 

 and Godman (1880, p. 88) for Santiago de Veraguas are not sup- 

 ported by specimens in the Salvin and Godman collections now in the 

 British Museum (Natural History) and are certainly in error. 



The type specimen of castaneus, described by Lawrence, came to 

 him in a collection made by James McLeannan and John R. Galbraith 

 during the winter of 1860-1861. The collectors were located at Lion 

 Hill, but it must be borne in mind that it is certain they covered a 

 considerable area along the line of the railroad in the course of their 

 work. In the present instance Lawrence (1861, pp. 315-316) states 

 that their specimens were taken "on the Atlantic side of the isthmus" 

 except for half a dozen species that he lists, which do not include the 

 bird here under consideration. Though the type specimen of castaneus 

 is labeled only "Panama" with the initials of the collectors, the desig- 

 nation "Lion Hill" found in current literature may be accepted as the 

 restricted type locality. 



THRYOTHORUS NIGRICAPILLUS REDITUS Griscom 



Thryophilus nigricapilhis reditus Griscom, Bull. Mus. Comp. Zool., vol. 72, 

 January 1932, p. 358. (Perme, Coraarca de San Bias.) 



Characters. — Similar to T. n. castaneus but with white of breast 

 more extensive; sides, abdomen, and under tail coverts paler, duller 

 brown ; more heavily and extensively barred with black. 



Measurements. — Males (15 specimens), wing 67.0-70.5 (68.9), tail 

 47.5-54.3 (52.0), culmen from base 19.3-21.9 (20.9), tarsus 24.0-26.5 

 (25.5) mm. 



Females (11 specimens), wing 63.2-67.7 (65.4), tail 45.0-51.4 

 (48.5), culmen from base 19.0-21.5 (20.1), tarsus 23.1-26.3 (24.7) 

 mm. 



Range. — From eastern Colon (Portobello) eastward on the Carib- 

 bean slope through the Comarca de San Bias (Mandinga, Perme, 

 Puerto Obaldia), crossing through the western Cerro Azul to the head 

 of the Rio Pacora on the Pacific slope, ranging eastward in the Prov- 

 ince of Panama along the Pacific side of the Serrania de Maje 



