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Show 1877.] MR. M. JACOBY ON NEW COLEOPTERA. 513 entirely piceous ; four basal joints of the antennse rufous, the rest black. Thorax about twice as broad as long, the sides regularly rounded, the anterior angles largely developed into a point and diverging outwardly, all the sides narrowly margined; surface very minutely granulose, remotely but distinctly punctured on the disk, the sides almost destitute of punctures ; a faintly visible longitudinal and smooth line extends across the middle of the disk; scutellum slightly sinuate below the base at the sides, apex subacute, surface impunctate, minutely granulose. Elytra much wider than the thorax, scarcely narrowed behind, the apex regularly rounded, and the sides with a narrow but deep margin, each elytron with about six distinct striae of small punctures, the sides confusedly punctate ; the first stria, near the scutellum, is very short, the space between the second and third and the fourth and fifth is wider than between the rest of the striae; the interstices also very minutely punctured and granulose. Underside testaceous, prosternum coarsely punctate near the sides, smooth in the middle; legs rufous, apex of tibise and the entire tarsi black. The posterior thighs with a small sharp tooth. Length 4 lines. Hab. Madagascar. Collection Jacoby. 6. RHYPARIDA COSTATIPENNIS, sp. nov. Oblong, semiquadrate, piceous. Head piceous, rugose-punctate, epistome not separated, with the apex and the labrum of a fulvous colour ; antennse entirely flavous. Thorax with the anterior margin sinuate at the sides, the posterior margin rounded, and the lateral ones almost parallel at the apex, slightly widened behind the middle, all the angles obtuse and not produced into a distinct tooth; surface closely and coarsely punctuate, piceous. Scutellum smooth, broader than long. Elytra slightly wider at the base than the thorax, parallel with the apex, regularly rounded. Each elytron with thirteen rows of deeply impressed punctures, not diminishing in size towards the apex, with the interspaces costate, the costse more raised towards the apex than near the base, and more or less minutely punctured; all the costae unite at the apex in such a way that the first costa near the sutural margin forms a sharp angle with the last costa, and the intermediate ones in the same way with the corresponding costae. The colour is a dark piceous, with a faint reflection of cupreous, the extreme lateral margin having a greenish reflection. Underside dark brown or piceous as well as the legs, with the tarsi testaceous. All the thighs armed below with an acute tooth. Length 2f lines. Hab. Madagascar. In m y collection. 7. RHYPARIDA NIGRICOLLIS, sp. nov. Oblong, ovate, shining, elytra rufous, thorax, head, and feet black. Head obsoletely punctured on the vertex, with a longitudinal middle line, at the end of which is a shallow round fovea; epistome sepa- PROC. ZOOL. Soc-1877, No. XXXIII. 33 |