1874.] MR. P. L. SCLATER ON THE GENUS SYNALLAXIS. 21 



outer edges of the primaries and secondaries, by the crested head and 

 stronger bill. 



42. Synallaxis ruticilla. 



Sphenura ruticilla et «S. guajacina, Licht. in Mus. Berol. 



Synallaxis ruticilla, Cab. et Hein. Mus. Hein. ii. p. 27 (1859). 



Synallaxis fitis, Pelz. Sitz. xxxiv. p. 123 (1859), et Orn. Bras, 

 p. 38. 



Leptoxyura obsoleta, Reich. Handb. p. 171 (?)• 



Fusca, cauda tota et alarum tectricibus rufis : loris et superciliis 

 longis albis : /route et capitis lateribus albidis, fusco subobsolete 

 striatis : subtus ochracescenti-alba, gula media flavicante tincta : 

 ventre et lateribus cinereo indutis : long, tota 5'8, alee 2*2, 

 cauda rectr. ext. 1*4, med. 29. 



Hab. Brasil. merid. et Monte Video (Sellow) ; Curytiba, prov. 

 Parana (Natt.). 



Mus. Berol. 



Obs. Species haud dissimilis S. pallida, sed fronte albido fusco 

 striato et pileo non rufo, distinguenda. 



Hr. v. Pelzeln having sent me for examination one of the types of 

 his S. fitis, I have little hesitation in associating it with S. ruticilla, of 

 which I have examined the typical examples in the Berlin Museum. 



Hr. v. Pelzeln is probably correct in referring Reichenbach's 

 Leptoxyura obsoleta to the present bird ; but Sylvia obsoleta of the 

 Berlin Museum (whence Reichenbach's name was originally derived) 

 belongs to the next following species. 



43. Synallaxis striaticeps. 



Synallaxis striaticeps, Lafr. et D'Orb. Syn. Av. i. p. 22 ; D'Orb. 

 Voy. Ois. p. 241, pi. 16. f. 1; Sclater, P. Z. S. 1859, p. 193; 

 Burm. La-Plata Reise, ii. p. 469. 



Phleocryptes striaticeps, Hudson, P. Z. S. 1872, p. 544. 

 Sylvia (sive Synallaxis) obsoleta, Mus. Berol. 

 Supra cinerea, pileo nigro striato : superciliis albis : alis fuscis, 

 harum tectricibus extus cum cauda tota rufis : subtus lactescenti- 

 alba : rostro longo, gracili, incurvo : long, tota 5*7, alee 23, 

 caudcB 2*4. 

 Hab. Rep. Argentina et Uruguay, Corrientes {D'Orb.); Buenos 

 Ayres and Rio Negro of Patagonia (Hudson) ; Monte Video (Sellow) ; 

 Mendoza (Burm.). 



Sect. c. Species pileo albo : alis extus et cauda rufis. 



44. Synallaxis albiceps. 



Synallaxis albiceps, Lafr. et D'Orb. Syn. i. p. 23 ; D'Orb. Voy. 

 p. 241, pi. xvi. fig. 2. 



Supra cum alis et cauda rufa : pileo albo : capitis lateribus nigri- 

 cantibus : subtus olivacea, gula albicante : long, tota 5 '8, alee 2 - 5, 

 cauda rectr. med. 2'5, ext. 1*5. 



Hab. Sicasica, Bolivia (D'Orb.). 



Mus. Brit. 



