(RED-FLANKED SONG-SPARROW.)
+Emberiza hypochondria+, _d'Orb. Voy., Ois._ p. 361, t. 45. fig. 1.
+Zonotrichia hypochondria+, _Burm. La-Plata Reise_, ii. p. 486
(Mendoza).
_Description._--Brownish grey, head darker; superciliaries white;
wings brownish black, edged with greyish rufous; tail brownish
black, four external pairs of rectrices with a long white mark on
the inner web, the outer pair with the outer web also margined with
white; beneath, throat and neck white; sides of head, mystacal line,
neck and breast-band plumbeous; belly dirty white; flanks chestnut:
whole length 6·0 inches, wing 2·8, tail 2·0.
_Hab._ Bolivia and Western Argentina.
Prof. Burmeister, who met with this species near Mendoza, says it is a
true _Zonotrichia_, and not a _Poospiza_, as sometimes considered.