Most of the genera to which the Argentine Finches belong are forms peculiar to the Neotropical Region, or at all events to the New World. The genus _Chrysomitris_, which contains our Siskin and other Old-World species, is the only one which has a wider distribution. One of the most characteristic forms of Argentine Fringillidæ is _Poospiza_, of which seven species are met with within the limits of the Republic, while _Lophospingus_, _Donacospiza_, _Gubernatrix_, and _Saltatricula_ are Fringilline types peculiar to Argentina. 47. PHEUCTICUS AUREIVENTRIS (d'Orb. et Lafr.). (BLACK-AND-YELLOW THICK-BILL.) +Pheucticus aureiventris+, _Scl. et Salv. Nomencl._ p. 27; _White, P. Z. S._ 1882, p. 598 (Salta); _Sharpe, Cat. B._ xii. p. 55. _Description._--Above, also head, throat, and chest, black; lesser wing-coverts yellow; two spots on the greater coverts and the base of the primaries white; tail black, the three outer feathers on each side tipped with white; belly and under wing-coverts bright yellow; sides sparsely spotted with black; bill and feet black: total length 8·7 inches, wing 4·5, tail 3·5. _Female_ similar. _Hab._ Bolivia and Northern Argentina. Examples of this fine species, originally discovered by d'Orbigny in Bolivia, were obtained by White in the forests of Salta. 48. GUIRACA CYANEA (Linn.). (INDIGO FINCH.) +Guiraca cyanea+, _Scl. et Salv. Nomencl._ p. 27; _White, P. Z. S._ 1882, p. 598 (Catamarca). +Guiraca cyanea argentina+, _Sharpe, Cat. B._ xii. p. 73. _Description._--Indigo-blue; lesser wing-coverts azure-blue; wing- and tail-feathers black; forehead azure-blue, and head washed with the same colour; bill and feet black: total length 6·8 inches, wing 3·6, tail 2·9. _Female_ brown; beneath brighter and rufescent. _Hab._ Brazil, Paraguay, and Northern Argentina. White found this bird "not uncommon around Andalgala in Catamarca, in hedges and thickets." Mr. Sharpe separates the Argentine bird as a subspecies, from its larger size. 49. GUIRACA GLAUCOCÆRULEA (d'Orb. et Lafr.). (GLAUCOUS FINCH.) +Guiraca glaucocærulea+, _Scl. et Salv. P. Z. S._ 1868, p. 139 (Buenos Ayres), _iid. Nomencl._ p. 27; _Durnford, Ibis_, 1877, p. 170 (Buenos Ayres); _Salvin, Ibis_, 1880, p. 353 (Salta); _Barrows, Bull. Nutt. Orn. Cl._ viii. p. 92 (Concepcion); _Sharpe, Cat. B._ xii. p. 75. +Coccoborus glaucocæruleus+, _Burm. La-Plata Reise_, ii. p. 488 (Paraná). _Description._--Uniform glaucous blue; wings and tail blackish, the feathers edged with light blue: total length 5·7 inches, wing 2·9, tail 2·3. _Hab._ Paraguay, Uruguay, and Argentina.