202 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



former, which, by the way, it closely resembles, it differs in the pro- 

 nounced isabelline suffusion of breast, sides, flanks, crissum, and sides 

 of head and neck. It is rather lighter above than fttriatulus, and 

 usually also below, but the chief and constant difference lies in the 

 shade of the breast, sides, flanks, and crissum, which in striatuhis is 

 ochraceous. 



TROGLODYTES MUSCULUS MUSCULUS Naumann. 



Troglodytes musculus Naumann, Vogel Deutschl., Ill, 1823, p. 724 (table) (Lich- 



tenstein manuscript. ) 

 Thryothorus wquinoctialis Swainson, Birds Brazil and Mexico, 1834-1841, ])\. xiii. 



Type locality. — Bahia, Brazil. 



Geogra/phical distribution. — Eastern Brazil, southwest to Paraguay. 



This is a very dark form, the lower parts being deeply, sometimes 

 almost uniformly suffused with rufous; the back is crossbarred with 

 blackish, and the lower tail-coverts are spotted or irregularly barred 

 with the same. 



The bird described as Thryothorus mquinoctialis by Swainson* 

 seems undoubtedly^ to be the same as that previously called musculus 

 by Naumann.^ 



TROGLODYTES MUSCULUS WIEDI (Berlepsch). 



Thryothorus platensin Wied, Beitr. Naturg. Bras., Ill, 1830, p. 742 {not Sylvia pla- 



tensis Latham, quae Cistothorus 2)latensis). 

 Thryothorus vriedi Beklbpsch, Journ. f. Orn., 1873, p. 231. 



Ty_pe locality. — Blumenau, Santa Catharina, Brazil. 



Geographical distribution. — Province of Santa Catharina, southeast- 

 ern Brazil. 



Although heretofore, by almost all writers, synonymized with mus- 

 culus, this form is well worthy of recognition, since it is readily dis- 

 tinguishable by its rather lighter under surface and its decidedly paler, 

 more grayish coloration above. 



The name jj>late7isis, under which Wied described this wren, can not 

 be used for it, as he simply identiffed his bird with the Sylvia platen^is 

 of Latham, which is a Cistothorus. 



TROGLODYTES MUSCULUS REX (Berlepsch and Leverkuhn). 

 Troglodytes furvus rex Berlepsch and Leverkuhn, Ornis., 1890, p. 6. 



Type locality. — Samaipata, Bolivia. 



Oeographical distribution. — Southwestern Brazil (Matto Grosso) to 

 central Bolivia. 



This easily recognizable race is separable from uiusculus hy its rather 

 larger size; much paler coloration, particularly below; more buffy 



« Birds Brazil and Mexico, 1834-1841, pi. xiii. 

 6Vog. Deutschl., Ill, 1823, p. 724 (table). 



