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Show 1 9 0 5 .] OF PHYTOPHAGOUS COLEOPTERA, 4*25 Length 8 millim. Of strongly convex, posteriorly widened shape, the head distinctly punctured at the vertex and near the eyes, black, the middle of the base with a short longitudinal groove, frontal tubercles narrow and transverse: antennae black, not extending to the middle of the elytra, the lower three joints testaceous below, short, the third joint slightly shorter than the fourth; thorax strongly transverse, the lateral margins strongly rounded, the anterior angles thickened but not dentiform, tlie sides rather broadly flattened, the disc minutely aciculate and extremely finely punctured , scutellum black ; elytra strongly convex, rather suddenly deflexed below the middle, closely, evenly and strongly punctured, the sides below the shoulders somewhat flattened, the margins only slightly thickened, not reflexed, the extreme basal and sutural margins black ; abdomen obscure testaceous ; rest of the under surface and the legs black. Ilab. Sao Paulo, Brazil, _ Amongst the nearly unicolorous species the present one is well distinguished by the shape and sculpture of the thorax and elytra and by the coloration. 0. balyi 01, has a differently shaped thorax and finely wrinkled elytra, O ed io n y ch is n ig r o t ib t a l is , sp. n. Head pale fulvous, the antennae, the anterior and intermediate tibiae, and the tarsi black; thorax flavous ; elytra fulvous, nearly impunctate ; under side and legs testaceous. Length 6 millim. Oblong-ovate ; the head pale fulvous, with a few punctures near the eyes; labrum piceous; antennae black, the third and fourth joints equal, terminal joints shorter and thicker; thorax rather strongly convex, the sides rounded and broadly flattened, the anterior angles thickened, slightly truncate, not produced, the surface very shining, impunctate, flavous ; scutellum black ; elytra dark fulvous, impunctate, with the exception of a short double row of punctures below the shoulders; below pale fulvous, the anterior and intermediate tibiae and all the tarsi black, posterior tibiae fulvous, Hab. St. Catharina, Brazil. Of rather convex and oval shape, and distinguished by the flavous thorax and the colour of the legs. Oe d io n y ch is co n s im il is , sp. n. (Clark Catah), Black, the clypeus testaceous ; thorax with broadly flattened sides, impunctate, testaceous; scutellum black; elytra very finely, partly obsoletely punctured, testaceous. Length 8 millim. Of posteriorly slightly widened shape ; the head black, with a few punctures placed in a row in front of the eyes ; clypeus testaceous, the carina very prominent; antennae black, the lower two 29* |