'624 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



h. Slightly smaller and paler (adult male averaging, wing 64.4, tail 

 44.2, exposed culmen 17.9, tarsus 24.4; adult female, wing 61.7, 

 tail 42, exposed culmen 17.4, tarsus 24.1). (Isthmus of Panama 

 and coast of Colombia to Cartagena. ) 



Thryophilns galbraithii galbraithii (p. 637) 



lih. Slightly larger and darker (adult male averaging, wing 66.5, tail 



43.3, exposed culmen 18.8, tarsus 25.2; adult female, wing 62.4, 



tail, 42.1, exposed culmen 17.5, tarsus 24). (San Miguel Island, 



Gulf of Panama. ) Thryophilns galbraithii conditus (p. 638) 



gg. Under parts pale buff, deeper buff or clay color on flanks and under 

 tail-coverts; pileum and back light broccoli brown. (Coast of 

 Colombia at mouth of Rio Magdalena. ) 



Thryophilns pallescens (extralimital)<ii 

 ff. Remiges very indistinctly or obsoletely barred with a slightly darker 

 shade than the ground color; under parts of body with buff or tawny 

 (if present) confined to sides, flanks, and under tail-coverts. 

 g. Smaller (wing 51.5-65, tail 44.5-56, exposed culmen 14.5-18.5, tarsus 

 22-25); above russet-brown (duller and more grayish on head); 

 sides and flanks tawny-brown. ( Thryophilus modestus. ) 

 h. Intermediate in coloration. ( Nicaragua and Costa Rica. ) 



Thryophilns modestus modestns (p. 639) 

 hh. Representing extremes of coloration. 

 i. Slightly paler and grayer above than the type. (Chiriqui to 



Panama Railway.) Thryophilns modestus elutus (p. 640) 



ii. Slightly darker and browner than the type. (State of Chiapas, 

 southern Mexico; Guatemala; Honduras ?) 



Thryophilus modestus pnllns (p. 641) 

 gg. Larger (wing 60-68, tail 47-54, exposed culmen 19-21, tarsus 25-27); 

 above grayish olive, sides and flanks buffy grayish brown. (East- 

 ern Costa Rica and Nicaragua.) Thryophilus zeledoui (p. 642) 



THRYOPHILUS CASTANEUS CASTANEUS (Lawrence). 

 BAY WREN. 



Adults (sexes alike). — Pileum, nape, and upper part of sides of neck 

 uniform black; lower hindneck and sides of neck, back, scapulars, 

 rump, and lesser wing- coverts uniform clear bright chestnut, the 

 upper tail-coverts similar but more or less distinctly barred with 

 dusky; tail black, the middle rectrices and outer webs of other rec- 

 trices barred with light chestnut or russet; greater wing-coverts and 

 remiges barred with black and light chestnut or russet, the bars of the 

 two colors about equal in width; a narrow superciliary line, lores, sub- 

 orbital region, auricular region, and malar region white, the suborbital 

 region and anterior and upper portion of auricular region more or less 

 streaked with dusky, with dusky or grayish black predominating; a 



"Thryophilus pallescens Lawrence, manuscript, on label. The type is from Barran- 

 quilla, Colombia, and clearly represents a form distinct from T. galbraithii, than which 

 it is smaller and many shades paler. It may possibly have already been adequately 

 described under some other name, but i£ so I fail to identify it. 



