OCR Text |
Show 816 MR. M. JABOBY ON N E W COLEOPTERA. [Dec. 5, now and then and in certain lights assumes on the head and thorax a lighter brown, this species is sufficiently distinguished from others. Family CHRYSOMELID^E. Genus D O R Y P H O R A , Illig. 20. D O R Y P H O R A RUGOSA, sp. nov. Oblong-ovate, rounded and widened in the middle, very convex towards the first third of the elytra, then falling off abruptly towards the apex. Above blackish blue, variegated with testaceous, below black, shining. Head deeply and closely covered with punctures which run together towards the epistome, with a longitudinal middle groove through its entire length. Antennae rather longer than the thorax, robust, black, shining, with the third joint the longest and thinnest. Thorax with the lateral margin slightly rounded and the posterior one sinuate, punctured in the same way as the head, on its surface more strongly towards the sides, these latter excavated and flattened and accompanied by a fulvous narrow band, which is much hollowed out at its inner margin. Scutellum impunctate. Elytra broader than the thorax, everywhere covered with rugosities and deep impressions distinctly visible to the naked eye; a narrow dentated band of testaceous colour extends across the middle from one side to the other, sending upwards three or four branches of the same colour towards the base ; while the posterior half of the elytra is variegated in the same way, more strongly visible near the suture. The mesosternal process comparatively short and straight. Length 8 lines. Hab. Columbia. In the collection of Dr. Baden, in Altona, and m y own. 21. DORYPHORA COSTATA, sp. nov. Ovate, very slightly widened behind, very convex towards the first half, then suddenly falling off towards the apex, above dark brown, a little shining, beneath black. Head and thorax without gloss; the first with a rather deep longitudinal impression before the anterior margin of the eyes, a transverse groove between the antennae, and a few scattered punctures here and there; labrum brown, shining ; antennae not reaching quite to the base of the'thorax, light flavous, the first joint much thickened, almost cylindrical, the second very short, the third the longest, double the length of the fourth, the rest thickened, cylindrical. Thorax with the sides straight and parallel, the anterior corners rounded and produced into a point reaching slightly above the eyes ; posterior margin slightly sinuate, anterior straight in middle, with a distinct margin which extends also to the sides, where it is, however, very narrow. The surface impressed with a few strong puuctures, which are a little more numerous towards the sides. Elytra wider at the base than the thorax, assuming their greatest convexity exactly at, the middle, from there suddenly declining to the apex; each elytron with ten rows of elevated ridges, of which the first and second are united at a little |