24 MR. P. L. SCLATER ON THE GENUS SYNALLAXIS. [Jan. 6, 



p. 213; Sclater, P. Z. S. 1859, p. 193, 1867, p. 324; Cat. A. B. 

 p. 153 ; Hudson, P. Z. S. 1872, p. 543. 



Synallaxisflavigularis, Gould, Voy. Beagle, Zool. iii. p. 78, pi. 24 ; 

 Ph. et Landb. Cat. Av. Chil. p. 12. 



"Synallaxis rufa, Landb. MS., " Scl. P. Z. S. 1867, p. 324. 

 Synallaxis brunnea, Gould, Voy. Beagle, iii. p. 78 (jr.). 

 Supra cineraceo-fusca : alis fusco-nigris rufescente limbalis : remi- 

 gum parte interiore in dimidio basali et subalaribus fulvis : subtus 

 valde dilutior, pallide ochraceo-cinerea, gulce macula rufescente : 

 caudce rectricibus tribus externis omnino rufis, ceteris nigris, parte 

 tertia extus anguste rufo limbata : long, tota 6, aim 2*3, 

 caudce 3. Junior macula gulari caret. 

 Hab. Rep. Argentina, Mendoza (fiwnw. et Weisshaupt) ; Conchitas 

 near Buenos Ayres and Rio Negro of Patagonia {Hudson) ; Port 

 Desire, Bahia Blanca, and Sta. Cruz (Darioin). 



Obs. Species a S. modesta rectricibus duabus externis omnino rufis 

 distinguenda. 



I have skins of this species from the first three localities men- 

 tioned, and hare examined Darwin's specimens in the British 

 Museum. Amongst the last are typical examples of S . jlavigularis 

 and S. brunnea. 



Sect. e. Species supra unicolor : cauda graduata acuminata : gulce 



macula lutea. 



52. Synallaxis sulphurifera. 



Synallaxis sulphurifera, Burm. P. Z. S. 1868, p. 636 ; Scl. et 

 Salv. P. Z. S. 1869, p. 632 ; Hudson, P. Z. S. 1872, p. 544. 



Supra fusca, alarum tectricibus et remigum fascia basali rufis : 

 cauda graduata : rectricibus valde acuminatis, lateralibus rufis : 

 mediis fuscis : subtus alba, gulce macula lutea : pectore hypochon- 

 driis, crisso, et subalaribus fulvescentibus : long, tota 6, alee 

 2'2, caudce rectr. med. 3*2, ext. 1 : rostro elongatiore, incurvo. 

 Hab. Rep. Argentina et Patagonia bor. : Buenos Ayres (Burm.) ; 

 Rio Negro (Hudson). 



This interesting species should perhaps be placed near to £. striati- 

 ceps, which it approaches as regards its graduated tail and slightly 

 incurved bill. But it agrees with the last group in having a distinct 

 gular patch. In habits, according to Mr. Hudson, it resembles 

 Limnornis curvirostris rather than its congeners. 



Sect./. Species supra unicolor : cauda rotundata : gulce 

 macula nulla. 



53. Synallaxis patagonica. 



Synallaxis patagonica, D'Orb. Voy. Ois. p. 249; Hudson, P. Z. S. 

 1872, p. 544. 



Supra murino-fusca : subtus dilutior, pallide cineracea : tectricibus 

 subalaribus et remigum marginibus cervinis, ventre hoc colore per- 

 fuse : cauda brevi rotundata, rectricibus nigris, harum una utrin- 

 que extima in pogonio externo rufescente, ceterarum etiam latera- 



