OCR Text |
Show 512 MR. F. P. PASCOE ON THE COLEOPTERA OF PENANG. [Nov. 22, Rich metallic green, scarcely shining, with numerous crowded punctures; upper lip, mandibles, and fore legs red; prothorax about half as long again as broad, the middle with a darker or bluish stripe; scutellum black, triangular; elytra with a golden tinge along the suture, the apex rounded; body beneath with silvery-white pubescence ; antennae black ; legs, except the anterior, blackish, the tarsi paler. Length 4 lines. MYDASTA. Antennae apicem versus incrassatar, scapo obconico. Elytra integra, postice angustata, lateribus haud declivibus. Tibiae robustar; tarsi subarquales. Head slightly produced anteriorly, not constricted behind. Eyes shortly ovate, not approximate above, strongly emarginate. Antennae half as long as the body, distant at the base, arising close to the eyes ; the scape shortly obconic ; the third joint twice as long as the scape ; the fourth considerably shorter ; the remainder thickened and, as far as the penultimate, slightly produced at the apex; the last joint conical. Prothorax oblong, strongly constricted at the apex and base, the intermediate portion rounded. Elytra narrowed posteriorly, contiguous at the suture, not bent down at the sides. Legs very unequal, the posterior pair by far the longest; femora strongly incrassated towards the apex ; tibiae stout; tarsi subequal, moderately dilated. Abdomen contracted at the base, the first segment nearly as large as the rest together. This genus has almost exactly the habit of Acyphoderes, Serv., but, inter alia, is without its muzzle, and with non-dehiscent elytra. MYDASTA DISCOIDEA. (PI. XLI. fig. 4.) M . capite chalybeato; prothorace aterrimo, antice posticeque, scutello fasciisque (subtus) argenteo-albis; elytris ameo-niyris, ferrugineo plagiatis. Head bluish black, strongly punctured, especially in front, where the punctures are divided by short vertical lines; lip brown, bordered with yellowish ; prothorax intensely black, deeply and closely punctured, the anterior border dark blue, behind this border, on each side, a band of silvery-white hairs, a similar band on the constricted portion behind; scutellum oblong, with a dense silvery pubescence; elytra entirely glabrous, brassy black at the base, a large patch of reddish ferruginous (varying in size) occupying the middle and posterior portion, the apex rounded, deep bluish black, punctures at the base almost contiguous, becoming smaller and more distant posteriorly; body beneath dark purplish blue, the meta-sternum posteriorly and edge of the first segment of the abdomen silvery white; legs brownish red, shining, the base of the posterior femora and the middle of their tarsi dark brown; antennae reddish, the last six joints black. Length 7 lines. |