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Show 1897.] PHYTOPHAGOUS COLEOPTERA OP AFRICA. 539 band ; scutellum rounded at the sides, more or less piceous or greenish ; elytra very strongly .punctured in rather irregular rows, closely placed, which are here and there nearly confluent below the shoulders, the ground-colour flavous with the following dark greenish spots-an elongate spot on the shoulders, a small one near the scutellum, four elongate spots placed transversely before the middle, two others rather larger immediately below the latter, and two smaller spots near the apex (one near the margin, the other near the suture), posterior portion of the suture likewise narrowly greenish or brownish ; elytral epipleuras with a short row of punctures at the base : underside and legs flavous, impunctate, all the femora armed with a distinct tooth; prosternum broad, the sides thickened, the disc finely punctured. Hah. Niger-Benue Expedition (Staudinger). M y collection. A w^ell-marked and distinct species, of which I have received three specimens from Dr. Staudinger. The markings of the thorax aud the spots of the elytra differ in the specimens in size and partly in shape, and it is quite possible that they may occasionally form longitudinal bands. Like the other species of the genus, the eyes are surrounded by a narrow sulcus. EHEMBASTUS IMITANS, n. sp. Pale fulvous or testaceous, the apical joints of the antennae and the knees piceous ; thorax sparingly punctured ; elytra distinctly punctate-striate, the sutural and lateral margins, a round spot at the base, and an elongate one at the middle of each elytron greenish aeneous. Length 1 line. Head impunctate, the vertex often dark aeneous, lower portion of the face with a few minute punctures, the clypeus not separated from the face ; eyes surrounded by a very narrow sulcus ; antennae extending to the middle of 'the elytra, fulvous, the terminal five joints nearly black, slender and elongate; thorax transversely convex, twice as broad as long, the lateral margins very slightly rounded, the disc with some remotely placed punctures, which do not extend to the base or the sides, the anterior margin sometimes aeneous at the middle ; scutellum ovate, greenish aeneous ; elytra with a rather feeble depression below the base, distinctly punctate-striate anteriorly, the punctures much finer towards the apex, the lateral margin accompanied by a row of deep punctures, narrowly greenish aeneous as well as the suture, a round spot at the base and a short stripe at the middle of the disc greenish aeneous: underside and legs pale fulvous, the knees darker; femora armed with a tooth ; prosternum impunctate. Hah. Madagascar, Diego-Suarez (Alluaud). In coloration this species almost resembles R. variabilis, Plar. (=4:-notata, Lefev.), but is less than half the size and has the elytral punctuation much finer; the antennae also differ in |