1861.] DR. p. L. SCLATER ON NEW AMERICAN BIRDS. 377 



recorded from the country north of Panama. It was, however, to 

 be expected that the Trans- Panamanic province of the Neotropical 

 region would produce representatives of this, as of other pecuHar 

 South-American genera. Sycalis chrysojis belongs to the same sub- 

 group as S. arvensis, but may readily be distinguished from it by its 

 diminutive size. 



4. Descriptions OF Twelve New Species of American Birds, 

 OF THE Families Dendrocolaptid^, Formicariid^, and 

 Tyrannid^. By Philip Lutley Sclater, M.A., Ph.D., 

 F.R.S., Secretary to the Society. 



(Plate XXXVI.) 



Fam. Dendrocolaptid.®. 

 1. Leptasthenura paranensis, sp. nov. 

 Synallaxis ruficapiUa, Burm. Cab. Journ. f. Orn. 1860, p. 250. 



Murino-brunnea, subtus paulo dilutior, gutture albicantiore : 

 alls extus et cauda tota rufis : pileo rufescente : rostro supe- 

 riore nigra, inferior e ad basin fusco : pedibus nigris. 



Long, tota 6-0, alse 22, caudse 3-3, rostri a fronte 0*35, tarsi 0*7 

 poll. Angl. et dec. 



Hab. In rep. Argentina. 



I have a single example of this Synallaxis presented to me by 

 Mr. O. Salvin, who received it in exchange from Prof. Burmeister. 

 It is marked Synallaxis ruficapiUa, but is very different from the 

 true Synallaxis ruficapiUa of Vieillot, and belongs to the section of 

 the SynallaxineB typified by Synallaxis cBgithaloides, with which it 

 agrees completely in form ; so that I have placed it under the same 

 generic head — Leptasthenura. 



The tail has 12 rectrices, as in L. cegithaloides, the first pair being 

 only 1-2 (inch) in length, and each pair gradually increasing. The 

 medial pair are not quite so sharply pointed as in the latter species. 

 The colour of the tail-feathers is uniformly rufous, with the shafts 

 blackened except towards the base. The structure of the beak, wings, 

 and feet resembles that of X. cegithaloides; but the tarsi in the present 

 species are rather longer*. 



2. Philydor stjbfulvus, sp. nov. 



Anabates ?, Sclater, P. Z. S. 1858, p. 456, 



Saturate brunnescenti-oUvaceus : cauda tota castanea : superciliis 



ad nucham productis, et corpore subtus fulvis, hoc lateraliter 



fuscescentiore sed ad gulum dilutiore : tectricibus subalaribus 



* Since reading this paper, I have convinced myself that this species is not 

 different from SpialloA-is fuliginiceps, Lafr. et D'Orb. (a species also found by 

 Professor Burmeister at Parana), and that my specimen was vrrongly labelled" S. 

 ruficapiUa," — an error which unfortunately induced me to regard it as new. 



