NO. 1276. NEW SOUTH AMERICAN BIRDS— OBERHOLSER. 67 



region grayish white, conspicuously streaked b}- feather margins of 

 dark brown; throat and breast dull brownish white, the breast laterally 

 much tinged with ochraceous; sides of body, flanks, lower abdomen, 

 andcrissum rufous, brighter posteriori}^ ; lining of wing dull l)rownish 

 white. Length of wing, <iO mm.; tail, 42 mm.; exposed culmen, 15.5 

 mm.; tarsus, 23 mm.; middle toe, 15.5 mm. 



The above-described species differs from Thryophilus longirostris 

 of Brazil in its much shorter bill and tail, darker upper surface, more 

 rufescent crown, conspicuous streaking of cheeks and auriculars, 

 whitish breast and center of abdomen. It is only subspecilically dis- 

 tinct from Thvy(ypMlus aJhipectus, although our material does not 

 indicate intergradation. Thryophilus albipcctus hogotevsis is evidently 

 the bird identified as Thryophilus leucotis by Dr. Sharpe,^ but is cer- 

 certainly not the Thriothonts leucotis of Lafresnaye. In the original 

 description of leucotis^ the cheeks are given as pure white, unmarked, 

 which character, as well as the color of the upper parts, clearl}^ is 

 inapplicable to Dr. Sharpe's bird from Venezuela or to the present 

 one from Colombia; but leucotis is apparently the bird now known as 

 Tlvryophilus galhraithii Lawrence.^ Dr. Sharpe synonymizes Thryo- 

 thoTus alhipectus Cabanis ^ with his T leucotis,^ but that they are not 

 identical is proved by a typical specimen in the National Museum 

 collection. 



By the arrangement above indicated the South American species of 

 the T. leucotis group would stand as follows: 



Thryophilus leucotis (Lafresnaye) (= T galhraithii Auct). — Panama. 



Thryophilus superciliaris (Lawrence). — Western Ecuador. 



Thryophilus longirostris longirostris (Vieillot). — Southeastern Brazil. 



Thryophilus longirostris striolatus (Spix). — Eastern Brazil (Bahia). 



Thryophilus alhipectus alhip>ectus (Cabanis). — Guiana and lower 

 Amazonia. 



Thryophilus alhip>ectus hogotensis Hellmayr. — Venezuela to Bolivia. 



Thryophilus alhipectus hypoleucus Berlepsch and Hartert. — Orinoco 

 region. 



Thryophilus alhipectus rufiventris (Sclater). — Central and South- 

 western Brazil. 



Thryophilus minor (Pelzeln). — Southwestern Brazil and Paragua}^ 



Thryophilus tmniopterus Ridgway. — Lower Amazonia. 



For the privilege of descri])ing the above specimen the writer is 

 indebted to the Carnegie Museum of Pittsburg, Pennsylvania, and to 

 the kindness of Mr. W. E, Clyde Todd, its curator of ornithology. 



1 Cat. Birds Brit. Mus., VI, 1881, p. 207. 

 •''Kev. Zool., 1845, p. 338. 

 3 Ann. N. Y. Lye. Nat. Hist., VII, 1860, p. 320. 

 *Schomburgk's Reis. Guian., Ill, 1848, p. 673, 

 5 Cat. Birds Brit. Mus., VII, 1881, p. 207. 



