Synallaxis ruficapilla. _Vieill._ Gal. des Ois. pl. lxxiv. Parulus ruficeps. _Spix._ Av. Sp. Nov. tom. 1. p. 84, t. lxxxvi. f. 1, m. f. 2. fem. Sphenura ruficeps. _Licht._ Ver. p. 42. My specimens were obtained at Maldonado, (June) where it was rare, and at Buenos Ayres. Near Santa Fè, in Entre Rios, 3° northward, it was common: Spix found it near the Rio San Francisco in Brazil. Iris yellowish red; legs with faint tinge of blue; tongue terminated in bristly points, not deeply bifid. This Synallaxis approaches in character _Anumbius ruber_. Habits similar to those of _S. maluroides_. ANUMBIUS RUBER. _D’Orb. & Lafr._ Anumbius ruber. _D’Orb. & Lafr._ Mag. de Zool. 1838, p. 18. Furnarius ruber. _Vieill._ Ency. Meth. 514. Anumbi rouge. _Azara_, No. 220. Frequents reeds on the borders of lakes near Maldonado. Habits very similar to those of _Synallaxis maluroides_, and likewise of the two species of Limnornis; to one of which _L. curvirostris_, it is most closely allied in structure. Iris bright yellowish orange; tarsi, with faint tinge of blue; tongue divided on each side a little below the extreme point. GENUS.—LIMNORNIS. _Gould._ Rostrum _capitis longitudine seu longius, leviter a basi ad apicem arcuatum, lateraliter compressum, haud emarginatum; naribus magnis basalibus linearibus apertis aut partim operculo tectis_: alæ _brevissimæ rotundæ, plumis quarta, quinta sextaque ferè æqualibus et longissimis_; cauda _rotundata et graduata, scapis aliquanto ultra radios productis_; tarsi _mediocres, fortiter scutellati; halluce digito medio breviore, robusto, ungue robusto armato, digitis lateralibus ferè æqualibus, intermediis aliquanto brevioribus_. 1. LIMNORNIS RECTIROSTRIS. _Gould._ PLATE XXVI. _L. pallide flavescenti fusca; cervice nigrescenti fusco; caudâ rufa; tectricibus primariis secundariisque fuscis rufo latè marginatis; fasciâ pone oculos, gulâ abdomineque flavescenti albis; hypochondriis fulvis._ Long. tot. 6²⁄₁₂ unc; _rost._ ²⁄₁₂, _alæ_, 2⁶⁄₁₂ _caudæ_, 2⁹⁄₁₂ _tarsi_, ⁹⁄₁₂. Crown of the head brown; the remainder of the upper surface, pale yellowish brown; tail rufous and acutely pointed; wing coverts, primaries and secondaries brown, broadly margined with rufous; stripe behind the eye, throat, and all the under surface buffy white; flanks tawny; bill lengthened, orange at the base, dark brown at the tip; iris rusty red; feet very pale coloured; claws whitish. Habitat, Maldonado, La Plata. (_June._) This bird lives amongst the reeds on the borders of lakes. It often alights vertically on stems of plants, but in climbing does not use its tail: habits, generally similar to those of _Synallaxis maluroides_. [Illustration: _Birds. Pl. 26._ _Limnornis rectirostris_ ] [Illustration: _Birds. Pl. 25._ _Limnornis curvirostris._ ]