Synallaxis superciliosa, Cab. J. f. O. 1883, p. 110 (Tucuman).
Description.—Above, head on top bright chestnut, lores white, superciliaries yellowish white; sides of head, neck, and back earthy brown inclining to olive; upper wing-coverts chestnut, wing-feathers blackish, the webs of the outer margins dull chestnut; tail chestnut; beneath, upper half of throat white, lower half black tipped with white; breast and belly brownish white; flanks and under tail-coverts pale earthy brown; under wing-coverts fulvous; bill and feet horn-colour: whole length 7·0 inches, wing 2·0, tail 3·5.
Hab. Tucuman.
This Spine-tail, so far as we know at present, is peculiar to Tucuman, where it was discovered by Herr Schulz.
[193.] SYNALLAXIS SPIXI, Scl.
(SPIX’S SPINE-TAIL.)
Synallaxis spixi, Burm. P. Z. S. 1868, p. 636 (Buenos Ayres); Scl. et Salv. P. Z. S. 1869, p. 632 (Buenos Ayres); Scl. P. Z. S. 1874, p. 9.
Description.—Above, crown chestnut; lores and sides of head dark cinereous; hind neck, back, also wing- and tail-feathers olive-brown; upper wing-coverts chestnut; beneath dark cinereous, becoming whitish on the belly, throat blackish; under wing-coverts fulvous chestnut; bill black, feet horn-colour; whole length 6·7 inches, wing 2·0, tail 3·2.
Hab. Southern Brazil and Argentina.
I like Azara’s name Chicli, which, to one acquainted with the habits of this and of the following species, seems very appropriate, suggesting, as I imagine it does, a small creature possessing a sharp two-syllabled note; for although Hartlaub, in his Nomenclature of Azara, gives S. ruficapilla as the species meant by Chicli, the account of its habits in the ‘Apuntamientos’ seems to point to S. spixi or to S. albescens.