_Z. capite castaneo, lineâ mediâ obscure diviso, plumis singulis striâ mediâ nigro-fuscâ, humeri flexurâ rufâ; corpore supra fuscescente, plumis singulis striâ latâ mediâ obscure fuscâ; remigibus, primariis caudâque nigro-fuscis pallidè fusco marginatis; strigâ superciliari, faciei collique lateribus, gulâ pectore abdomineque medio cinereis; hypochondriis tegminibusque caudæ inferioribus flavescentibus._ Long. tot. 5¾ unc.; _rostri_, ½; _alæ_, 2½; _caudæ_, 2⅞; _tarsi_, ⅝. Head chestnut, divided down the middle by a line of deep grey, each feather with a stripe of blackish brown down the centre; point of the shoulder rufous; the remainder of the upper surface light brown, with a broad stripe of dark brown down the centre of each feather; primaries and tail brown; secondaries blackish brown, margined all round with pale brown; stripe over each eye, sides of the face and neck, throat, breast, and centre of the abdomen, grey; flanks and under tail-coverts buff; upper mandible black; under mandible light horn colour; feet brown. Habitat, Santa Fe. Lat. 31° S. (_October._) This species appears to replace in this latitude the _Z. matutina_, which is so abundant on the banks of the Plata and in Chile, as that species does the _Z. canicapilla_ of Patagonia and Tierra del Fuego. PASSERINA JACARINA. _Vieill._ Tanagra jacarina, _Linn_. Passerina jacarina, _Vieill_. Ency. Meth. p. 933. Emberiza jacarina, _D’Orb. & Lafr._, Syn. Le Sauteur, _Azara_, No. 138. Euphone jacarina, _Licht_. Cat. p. 30. Fringilla splendens, _Vieill_. Ency. p. 981? I procured a specimen of this bird at Rio de Janeiro. 1. FRINGILLA DIUCA. _Mol._ Fringilla Diuca, _Kittl._ Mem. de St. Petersb. t. i. pl. 11. —— Mag. de Zool. 1837, pl. 69. Emberiza Diuca, _D’Orb. & Lafr._ Syn. Mag. of Zool. 1838, f. 77.