OCR Text |
Show 1892.] PHYTOPHAGOUS COLEOPTERA F R O M MADAGASCAR. 569 lower end and not extending to the apex, the lateral margins metallic green as far as the middle of the elytra, the femora with a very minute tooth, slightly stained with piceous; everything else as in P. eeneicollis. IVONGIUS NIGROMACULATUS, n. sp. (Plate XXXIX. fig. 5.) Testaceous, the head and thorax impunctate; elytra finely punctate-striate, nearly impunctate near the apex, the extreme lateral margin and a small spot below the middle black ; femora unarmed. Length 1 line. Of convex and subcylindrical shape, the head impunctate, without any grooves or depressions, the clypeus not separated from the face, its anterior edge concave, the eyes surrounded by a narrow sulcus ; the antennae quite extending to half the length of the elytra, flavous, the basal two joints thick and short, of equal length, the third and following joints more slender, the terminal ones distinctly incrassate; thorax nearly twice as broad as long, subcylindrical, the sides very strongly deflexed, straight; the anterior margin straight, the posterior one rounded and widened at the middle, the surface impunctate ; elytra slightly widened posteriorly, strongly convex, with a very slight depression below the base, the shoulders prominent, the surface finely punctate-striate, the punctures nearly obsolete near the apex, the extreme lateral margin and a small spot placed near the latter below the middle black ; underside and legs flavous, the last tarsal joint and the claws stained with black ; femora unarmed, claws bifid ; prosternum widened posteriorly. This species resembles much in shape those of the genus Paria and also of Syagrus; on account of the unarmed femora and bifid claws, however, I have placed it in Ivongius; in some specimens the lateral elytral margin is of the flavous or testaceous groundcolour. RHEMBASTUS DIMIDIATICORNIS, n. sp. Fulvous, the sixth and seventh joints of the antennae black, thorax distinctly punctured on the disc ; elytra violaceous blue, distinctly punctate-striate, the apex fulvous. Var. a. Elytra flavous, the base, suture, and an oblique band at the middle obscure fuscous. Var. b. Elytra entirely fulvous. Length \\ line. Of convex, subcylindrical shape ; the head nearly impunctate, fulvous; the clypeus not separated from the face ; eyes emarginate, widely separated, sulcate above their inner margin; antennae scarcely extending to half the length of the elytra, fulvous, the sixth and seventh joints black, the terminal ones distinctly thickened, the first and second joints short, almost equal, the second and third joints thinner, equal; thorax about one half broader than long, narrowed in front, the sides nearly straight, the surface finely and sparingly punctured on the disc only, fulvous; scutellum fulvous; elytra broader at the base than the thorax, |