| OCR Text |
Show 1876.J MR. M. JACOBY ON NEW COLEOPTERA. 811 not closely punctured ; labrum, palpi, underside of first joint, as the second and third entire joints, of antennas ferruginous. Thorax with the lateral margin rounded, the posterior deeply sinuate, rugose-punctate, with a high triangular elevation on the middle of its disk, the top of which is divided by a shallow longitudinal channel, the posterior sides at the same time falling off suddenly towards the base of the thorax, and occupied by another small rounded elevation not reaching the lateral margin. Scutellum acute triangular, impunctate. Elytra with the sutural margin dentate almost through its entire length, the surface of each elytron containing three strongly raised curved ridges running nearly in a line with each other, and connected together by short transverse branches and here and there by a network of elevated striae ; besides these three large ridges another short one of an S-shape is situated near the suture at the base, and joined to the first ridge in its middle. Body beneath, together with the legs, greenish blue, closely rugose-punctate ; last joint of the tarsi ferruginous. Length 3 lines. Hab. Peru. This beautiful species, which was discovered by Mr. E. Bartlett during his travels in Peru, is easily separated from others by its brilliant metallic blue, its size, and the markings of its elytra (which approach to a certain extent those of C. episcopalis, Lac), but yet is very different in its general character. The species is in m y collection. 9. CHLAMYS UNICOLOR, sp. nov. Ovate-oblong, convex, subcylindrical, narrowed behind, upper and underside unicolorous bluish olive-green, not shining. Head with a longitudinal impression ; anterior margin of epistome rounded, the entire face strongly punctate ; labrum shining fulvous; antennae either entirely or only the basal joints light brown. Sides of thorax almost straight, converging from base to apex, angles moderately acute; posterior margin not bisinuate but largely waved, median lobe moderately produced, its apex bidentate, as usually in this genus; upper surface closely punctate; a humplike elevation of moderate size is situated on the disk, divided by a shallow channel and surrounded on all sides by another narrow depression; each side of the hump is furnished with 6 tubercles, of which 5 are situated in a semicircle, while the sixth is contained in its middle ; scutellum transversely subquadrate, its sides sinuate, narrower at the base than at the apex, hollowed out in its middle, impunctate. Elytra distinctly narrowed from their base towards the apex, sides almost as far lobed as their middle ; upper surface coarsely but widely punctate, forming only one regular stria at the sutural margin, which latter is finely dentate from the middle to the apex ; transverse irregular costae and a few tubercles are placed without order on the disk of each elytron. Underside deeply impressed with numerous round large punctures, which, however, extend to the legs only sparingly. Length 2 lines. |
