THETOPHILIIS. 85 



from the higher mountainous interior of the country. T. zeledoni has a close resem- 

 blance to the Panama race of T. modestus in its pale colour ; but the Panama bird is 

 smaller, not larger, than T. modestus. As regards the ranges in altitude of these species 

 ascribed to them in Costa Eica ^, no deduction of much value can be drawn ; for iu 

 Guatemala we found T. modestus at elevations varying as much as 5000 feet and at less 

 than 1000 feet above the sea-level. It is therefore hardly likely to be restricted in Costa 

 Eica to the highlands. On the whole, we think that the relationships of T. modestus 

 and the Panama race of it to T. zeledoni require further investigation ; and we only 

 regret that our materials are not sufficient to enable us to attempt an explanation of 

 them. 



5. Thryophilus leucotis. 



Thrioihorus leucotis, La£r. Rev. Zool. 1845, p. 338 ^; Bp. Consp. 1. p. 221 ". 



Thryophilus leucotis, Scl. & Salv. Nomencl. Av. Neotr. p. 6^ 



Thryothorus galbraithi, Lawr. Ann. Lye. N. Y. vii. p. 320*. 



Thryophilus galbraithi, Baird, Eev. Am. B. i. p. 131 '. 



Thryothorus albipectus, Cab. in Schomb. Guiana, iii. p. 673 °; Scl. & Salv. P. Z. S. 1864, p. 345 '. 



Thryothorus, sp. ?, Cassin, Pr. Ac. Phil. 1860, p. 193'. 



Supra rufescenti-brumieTis, uropygio cinnamomeo tincto ; alis anguste, cauda late nigro transfasciatis ; super- 

 ciUis distinotis, gula et genis serioeo-albis ; subtus pallide fusco-cinnamomeus, gulam versus albicantior ; 

 rostro comeo, mandibula albicante ; pedibus obscure fuscis. Long, tota 5"0, alae 2*5, caudae 1*9, rostri 

 a rictu I'O, tarsi 1*0. (Descr. maris ex Lion HiU, Panama. Mus. nostr.) 

 § mari similis. 



Hab. Panama, Lion Hill {M^Leannan^), Turbo, Isthmus of Darien [Schott^). — 

 Colombia 1; Venezuela; Guiana^. 



This species has a very limited range in Central America, where it has not been 

 detected beyond the limits of the State of Panama. Here it was discovered by 

 M'Leannan and Galbraith, Mr. Lawrence describing the bird under the name of the 

 latter naturalist*. A careful examination of Central- American examples with others 

 from the northern parts of the South- American continent has convinced us^ that no 

 definite points of distinction can be traced between them, and that all should bear the 

 name T. leucotis, bestowed upon a bird from Colombia or Mexico (the latter locality 

 doubtless an error, but repeated by Bonaparte^) by the late Baron Lafresnaye^, of which 

 T. albipectus is a synonym^. In Western Ecuador a distiuct race appears to exist, 

 which Mr. Lawrence has called T. superciliaris, basing his characters upon specimens 

 from the island of Puna in the Gulf of Guayaquil. 



At first sight T. leucotis has a general resemblance to T. modestus, but may readily 

 be distinguished by the distinct dark bars on the wings. 



