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Show 420 MR. MARTIN JACOBY ON NEW SPECIES [Nov. 28, Hab. Paraguay. Of this species, very well distinguished by the almost rugose entire upper surface, I know of only a single specimen. O e d io n y ch is n ig r o su tu r a l is , sp. n. Black ; thorax finely and sparingly punctured, testaceous; elytra strongly convex, closely and strongly punctured, testaceous, the extreme sutural margins black; abdomen fulvous. Length 9 millim. Head entirely black, with a few punctures near tlie eyes; clypeus strongly convex between the antennae, the latter short, not extending to the middle of the elytra, black, the lower two joints obscurely stained with piceous, third joint distinctly shorter than the fourth ; thorax rather more than twice as broad as long, the lateral margins strongly rounded, anterior angles not produced but thickened, sides deeply but narrowly sulcate, the disc very sparingly and finely punctured, testaceous; scutellum black; elytra rather strongly convex below the middle (when viewed sideways), with very narrow, thickened, reflexed margins, very closely and comparatively strongly punctured, the suture very narrowly black ; breast and legs black ; abdomen fulvous. Hab. Brazil. I know of only a single, apparently female specimen of this species, which is distinguished by the strongly punctured, convex elytra and black suture, as well as by the colour of the head and under side. O e d io n y ch is pic ifro n s, sp. n . (Clark Catal.). Testaceous, the vertex of the head and the antennae pale piceous ; thorax impunctate ; elytra very finely and closely punctured ; posterior femora pale fulvous. Length 6^ millim. Of somewhat flattened, oblong shape, the head impunctate, the vertex very pale piceous, frontal elevations strongly raised, trigonate ; clypeus triangularly carinate ; eyes large, widely separated ; antennae extending to the middle of the elytra, pale piceous, third and fourth joints equal ; thorax with the sides rather strongly rounded and broadly flattened, the anterior angles thickened but only slightly produced, the surface impunctate ; scutellum pale piceous ; elytra slightly widened towards the middle, narrowly margined, extremely finely and rather closely punctured, the shoulders very prominent and deeply longitudinally sulcate within, the depressions more strongly punctured, pale testaceous ; under side and legs coloured like the upper surface, the posterior femora pale fulvous or piceous. IIab. Brazil. Of more oblong shape, less broadly rounded than most of the unicolorous species, very pale testaceous, with the exception of the head, antennae, and the posterior femora; the sides of the thorax rather strongly rounded, the shoulders very prominent. |