(RED-BACKED FINCH.) +Phrygilus dorsalis+, _Cab. Journ. f. Orn._ 1883, p. 109. _Description._--Ashy grey; back rusty red; wing-coverts blackish; chin, lower belly, and crissum whitish: whole length 6·5 inches, wing 3·7, tail 2·6. _Hab._ Tucuman. Schulz discovered this species on the Cerro Vayo of Tucuman, near the snow-line. It reminds one of the North-American species of _Junco_ in its coloration. 69. PHRYGILUS UNICOLOR (d'Orb. et Lafr.). (SLATY FINCH.) +Phrygilus unicolor+, _Scl. et Salv. Nomencl._ p. 31; _Cab. J. f. O._ 1878, p. 195 (Cordova). +Phrygilus rusticus+, _Burm. La-Plata Reise_, ii. p. 487 (Mendoza). _Description._--Above nearly uniform slaty grey, below paler, whiter on the middle of the belly; bill dark horn-colour, feet clear brown: whole length 6·0 inches, wing 3·6, tail 2·6. _Female_ cinereous, with blackish shaft-spots above and below; paler on the middle of the belly. _Hab._ Andes of Colombia, Ecuador, and Peru; Chili, Bolivia, and Northern Argentina. 70. PHRYGILUS FRUTICETI (Kittl.). (MOURNING FINCH.) +Phrygilus fruticeti+, _Burm. La-Plata Reise_, ii, p. 487 (Cordillera of Mendoza); _Scl. et Salv. Nomencl._ p. 31; _Hudson, P. Z. S._ 1872, p. 537 (Rio Negro); _Durnford, Ibis_, 1878, p. 393 (Chupat); _Döring, Exp. al Rio Negro, Zool._ p. 39 (R. Colorado, R. Negro). +Emberiza luctuosa+, _Eyd. et Gerv. Mag. de Zool._, 1836, _Ois_, pl. 72. _Description._--Grey, with minute black markings on the head and neck, and broader stripes on the back; greater coverts and wings black, the feathers edged with grey, and a band of white spots across the coverts; tail black; beneath, throat, and upper part of breast black, many feathers tipped with grey, giving the chest a mottled appearance; lower part of breast and belly grey, mottled below the chest with a few black spots; centre of abdomen and under tail-coverts white; beak yellow; feet flesh-colour: total length 7·3 inches, wing 4·0, tail 3·2. _Female_ obscure grey and without the black colour on the throat and chest. _Hab._ Peru, Bolivia, Chili, and Argentine Republic.