(D'ORBIGNY'S SPINE-TAIL.)
+Synallaxis orbignii+, _Scl. et Salv. Nomencl._ p. 64; _Scl. P. Z.
S._ 1874, p. 22, et 1879, p. 461; _Salvin, Ibis_, 1880, p. 358
(Salta). +Synallaxis humicola+, _Burm. La-Plata Reise_, ii. p.
468 (Mendoza, Paraná). +Synallaxis crassirostris+, _Leybold, J.
f. O._ 1865, p. 401. +Synallaxis flavigularis+, _Döring, Exp. al
Rio Negro, Zool._ p. 45.
_Description._--Above pale earthy brown, superciliaries whitish;
wing-feathers blackish, the basal part of the secondaries pale
chestnut, forming a transverse band; four middle tail-feathers
blackish, the lateral pale chestnut; beneath whitish brown; middle
of throat pale rufous; under wing-coverts fulvous; bill and feet
horn-colour: whole length 6·5 inches, wing 2·2, tail 3·2.
_Hab._ Bolivia and Argentina.
This Spine-tail has been noticed by various observers in Northern
Argentina, and, if we are correct in referring _S. flavigularis_ of
Döring to the same species, occurs also in the Rio Negro district.