The nest is made in the centre of a thorny bush two or three feet from the ground; and is round and domed, with a small aperture at the side, and built entirely of fine dry grass. The eggs are four in number and of a pure white. The Little Cock is nine inches long, has long stout legs, and short, curved beak. The colour of the head and neck is deep reddish brown, lined with white, the feathers of the crown forming a crest. The upper surface and wings olive-brown; tail dark; throat and breast grey; middle of the belly white, with a broad ruddy rufous patch on each side reaching to the belly. 228. RHINOCRYPTA FUSCA, Scl. et Salv. (BROWN GALLITO.) +Rhinocrypta fusca+, _Scl. et Salv. Nomencl._ pp. 76, 161. _Description._--Above uniform pale cinnamomeous brown; superciliaries whitish; tail blackish, except the middle pair of rectrices, which are the same as the back; beneath white, faintly tinged with cinnamomeous; bill horn-colour, feet black: whole length 6·5 inches, wing 2·5, tail 2·4. _Hab._ Mendoza. The original examples of this species were obtained by the German collector, Weisshaupt, near Mendoza. It appears to have been mistaken for the young of the preceding species, but is decidedly different. 229. PTEROPTOCHUS ALBICOLLIS, Kittl. (WHITE-NECKED TAPACOLA.) +Pteroptochus albicollis+, _Burm. La-Plata Reise_, ii. p. 471 (Mendoza); _Scl. et Salv. Nomencl._ p. 76. _Description._--Above chestnut-brown, obscure or slightly olivaceous on the neck and upper part of back; inner webs of wing-feathers blackish; lores, superciliaries, and under surface white, the breast sparsely, and the belly and flanks thickly marked with transverse spots of blackish brown; lower flanks and under tail-coverts chestnut-brown, obscurely spotted with black; bill and feet black: whole length 8·5 inches, wing 3·1, tail 2·9. _Female_ similar. _Hab._ Chili and Western Argentina. Dr. Burmeister tells us that he met with this Chilian species in the water-courses near Mendoza, where it was seen running about on the stones like a Dipper.