90 TEOGLODYTIDiE. 



we have employed slight characters which serve to group the species into what appear 



to be natural groups. 



About eighteen species are now known of the genus ; of these, nine are found within 

 our borders. Four out of eleven belong to the Pheugopedius section, three of which 

 are peculiar to Central America and Mexico, viz. T. maculrpectus to Mexico and 

 Guatemala, T. atrogularis to Costa Eica, and T. hyperythrus to the State of Panama— 

 the fourth, T. fasciativentris, ranging from Costa Rica to Colombia. Of the more typical 

 Thryothori, T.felix is peculiar to Mexico and T. lawrencii to the Tres-Marias Islands; 

 T. berlandieri just enters our north-eastern border, and T. alhinucha is peculiar to 

 Yucatan. Of the small-billed section Thryomanes, T. hairdi is found throughout 

 Mexico, and ranges beyond our northern border into the adjoming frontier territories. 

 No true Thryothorus is found in the South-American continent ; but three species are 

 peculiar to the Lesser Antilles. 



A. Pheugopedius. 



Uropygium immaculatwn. 



a. Bostrum valde rohustwm, gula immaculata. 



1. Thryothorus fasciativentris. 



Thryothorus fasciato-ventris, Lafr. Rev. Zool. 1845, p. 337'; Scl. & Salv. P. Z. S. 1864, p. 346% 



1879, p. 493'; Lawr. Ann. Lye. N. Y. ix. p. 92*; Salv. P. Z. S. 1870, p. 180=. 

 Cyphorhinus fasciato-ventris, Lawr. Ann. Lye. N. Y. vii. p. 320*. 

 Pheugopedius fasciato-ventris, Baird, Rev. Am. B. i. p. 134'. 

 Cyphorhinus albigularis, Scl. P. Z. S. 1855, p. 76, pi. 88*. 



Supra rufescenti-brunneus, aUs extus obsolete nigro transfasciatis ; Cauda nigra brunneo transvittata ; capitis 

 lateribuB nigris, superciliis posticis et gutture toto pure albis, pectore late nigro, abdomine crissoque nigris 

 albo transfasciatis ; rostro nigricanti-plumbeo, tomiis paUidis ; pedibus obscure nigricantibus. Long, tota 

 5-6, alse 2-7, caudse 2-4, rostri a rictu 1-0, tarsi 14. (Descr. maris ex Lion HUl, Panama. Mus. 

 nostr.) 



Jwi. subtus rufescentior, gula cinereo-albicante et abdominis fasciolis albis nullis, rostri mandibula flava. 

 (Descr. exempl. ex Cbiriqui. Mus. nostr.) 



Hah. Costa Rica, San Mateo (/. Cooper^); Panama, (Delattre^), Bugaba^, Bibala 

 {ArcS), Lion Hill (M'Leannan^^'^). — Colombia i^^. 



Though skins of this Wren are occasionally sent in collections from Bogota, it is in 

 the valleys stretching northwards from that city that the bird is found, no trace of it 

 having as yet been met with in the upper waters of the affluents of the Orinoco and 

 Amazon. In the Cauca valley Salmon found it at Remedios and Neche ^, whence it 

 spreads northwards through the State of Panama to Costa Rica. A specimen from 

 Colombia furnished Lafresnaye with the description of his T. fasciatoventris \ the 

 name Cyphorhinus albigularis having been given by Mr. Sclater to a Panama bird 



