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Show 514 MR. F. P. PASCOE ON THE COLEOPTERA OF PENANG. [Nov. 22, The longer setaceous antennae and entire elytra will distinguish this genus from any of the Asiatic Rhinotraginar. Whether the South American genera Rhopalophora, Cosmisoma, Disaulax, and others should be kept apart, as M . J. Thomson has done in his 'Essai,' although not in his more recent ' Systema,' is a question that I will not at present undertake to decide. Certainly Mimistena would point to their union. MIMISTENA FEMORATA. (PI. XLI. fig. 6.) M . nigra, nitida; scutello niveo; elytris viridi-metallicis; antennis in medio pallidis. Black, glabrous, shining ; head finely punctured, with short raised vertical lines in front and between the antennae; prothorax impunctate anteriorly, the disk behind the constricted portion irregular and finely punctured; scutellum rounded, covered with a snowy-white silky pubescence ; elytra dark metallic green, irregularly punctured, the apex pointed; body beneath and legs glossy black; antennae with the sixth, seventh, and eighth joints nearly white. Length 5 lines. PLUTONESTHES. Plutonesthes, J. Thomson, Syst. Ceramb. p. 160. PLUTONESTHES CROCATA. (PI. XLIL fig. 2.) P. nigra, pilosa; prothorace elytrisque aurantiacis; corpore infra cyaneo-chalybeato. Black, with long scattered erect hairs; head closely punctured, much constricted behind the eyes ; prothorax narrow, covered with a silky orange pubescence ; scutellum triangular; elytra four times as long as the prothorax, the sides parallel at the base, but gradually expanding before the middle, and rounded at the apex, covered with a coarse silky orange-coloured pubescence, darker or brownish at the apex ; body beneath bright steel-blue ; legs glossy black ; antennae opake black, hairy at the base. Length 4| lines. M . J. Thomson's P. rufipennis differs from the above, according to his description, in its roughly punctured prothorax. He makes no mention of the long scattered hairs and glossy steel-blue of the under surface; and therefore I do not hesitate in considering it distinct. Another nearly allied species is in m y collection from Singapore with shorter legs and apex of the elytra blue black. ERYTHRIN^E. ERYTHRUS. Erythrus, White, Catal. Long. Brit. Mus. p. 142. Pseudoleptura, J. Thomson, Essai, &c, p. 148. ERYTHRUS IGNITUS. E. niger; prothorace coccineo, utrinque vittis duabus nigris; etytris coccineis, later aliter fortiter declivibus, apice nigris. |
