Azara's Sand-Plover is distributed all over South America east of the Andes, and has been obtained by Mr. Salvin in Guatemala. It is a close ally of the Kentish Plover of Europe (_Æ. cantiana_), but has the black pectoral band complete in the adult form. This Plover appears to be an inland species. Durnford observed it in October, December, and February in the neighbourhood of Buenos Ayres, on "dry sandy ground," frequenting the same sort of places as the Common Ring-Plover in England. He also met with it during his last journey to Tucuman, and Mr. Barrows found it "rather abundant" in small flocks all over the open country in Entrerios. 391. OREOPHILUS RUFICOLLIS (Wagl.). (SLENDER-BILLED PLOVER.) +Oreophilus ruficollis+, _Wagl., Scl. et Salv. Nomencl._ p. 143; _Durnford, Ibis_, 1877, p. 42 (Chupat), et 1878, p. 402 (Centr. Patagonia). +Oreophilus totanirostris+, _Cab. J. f. O._ 1878, p. 199 (Sierra de Cordova). +Charadrius totanirostris+, _Seebohm, Plovers_, p. 111. _Description._--Above grey, varied with yellowish brown, and striped with black on the back and wing-coverts; front and superciliaries yellowish brown; stripe through the eye blackish; wings blackish with white shafts, and slightly edged with white, their under surface white; tail grey, with a black subterminal bar on the lateral feathers: beneath grey, whole throat rusty reddish; large ventral patch black; sides of belly and crissum cinnamomeous white; bill black; feet yellowish: whole length 10·0 inches, wing 6·5, tail 3·0, bill from gape 1·5. [Illustration: SLENDER-BILLED PLOVER. (Seebohm's 'Plovers,' p. 111.)] _Hab._ Southern half of South America. This pretty and curious Plover, with a Snipe-like beak, inhabits South Patagonia and the Falklands. In the autumn it migrates north, and during the cold season is found sparsely distributed throughout the Argentine States, and passes into Bolivia and Peru. On the pampas it is most abundant in April, but most of the birds seen during that month are travellers to warmer latitudes.