Both Durnford and White obtained specimens of this bird in the province of Salta; White's examples were met with in open country, dotted with thickets of low brushwood, to which the bird resorts. 57. LOPHOSPINGUS PUSILLUS (Burm.). (DARK-CRESTED FINCH.) +Lophospiza pusilla+, _Burm. La-Plata Reise_, ii. p. 483. +Lophospingus pusillus+, _Cab. J. f. O._ 1878, p. 195 (Cordova). +Coryphospingus pusillus+, _Salv. Ibis_, 1880, p. 354, pl. ix. fig. 1 (Tucuman). _Description._--Above grey; sides of head and crest blackish; broad superciliaries white; wings blackish, edged with whitish grey; tail blackish, lateral rectrices with broad white tips; beneath greyish white, clearer on the throat and middle of the belly; bill dark horn-colour; lower mandible whitish; feet pale brown: whole length 5·0 inches, wing 2·5, tail 2·4. _Hab._ Northern Argentina. 58. DONACOSPIZA ALBIFRONS (Vieill.). (LONG-TAILED REED-FINCH.) +Donacospiza albifrons+, _Scl. et Salv. P. Z. S._ 1869, p. 632 (Buenos Ayres), _iid. Nomencl._ p. 30; _Durnford, Ibis_, 1877, p. 171 (Buenos Ayres); _White, P. Z. S._ 1883, p. 38 (Cordova); _Döring, Exp. al Rio Negro, Zool._ p. 38 (Pampas). +Poospiza albifrons+, _Burm. La-Plata Reise_, ii. p. 484 (Paraná). _Description._--Above yellowish grey, the back striped with blackish; lesser wing-coverts clear grey; greater coverts and wing-feathers black, edged with brown; head nearly the same as the back, somewhat grey on the cheek, the crown and nape washed with olive-brown; superciliary stripe and under surface buff; bill and feet horn-colour: total length 6·0 inches, wing 2·5, tail 3·0. _Hab._ Paraguay, Uruguay, and La Plata. The slender body, great length of tail, and the hue of the plumage, assimilating to that of sere decaying vegetation, might easily lead one into mistaking this Finch for a _Synallaxis_ where these birds are abundant. I have met with it in the marshy woods and reed-beds along the shores of the Plata, but it is a shy, rare bird in Buenos Ayres. I have followed it about, hoping to hear it utter a song or melodious note, but it had only a little chirp. I would not, however, on this account pronounce it to be the one silent member of a voiceful family, as my acquaintance with it is so very slight. 59. POOSPIZA NIGRORUFA (d'Orb. et Lafr.). (BLACK-AND-CHESTNUT WARBLING FINCH.) +Poospiza nigrorufa+, _Burm. La-Plata Reise_, ii. p. 484 (Paraná); _Scl. et Salv. Nomencl._ p. 30; _Durnford, Ibis_, 1877, p. 171 (Buenos Ayres); _Döring, Exp. al Rio Negro, Zool._ p. 38 (Rio Sauce); _Barrows, Bull. Nutt. Orn. Cl._ viii. p. 129 (Concepcion).