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Show 1866.] MR. F. P. PASCOE O N T H E COLEOPTERA OF PENANG. 519 PACHYTERIA SPECIOSA. (PI XLIII. fig. 5.) P. subglabra, coccinea, nitida ; capite dimidio apicali, elytris et corpore infra viridi- vel cyaneo-chalybeatis; pedibus atris; antennis flavis, articulis duobus basalibus luteis. Nearly glabrous, shining ; head dark metallic green, closely and finely punctured; lips luteous ; mandibles and eyes black; prothorax bright scarlet, sharply sulcated anteriorly, closely punctured, the punctures more or less confluent, the intervals, especially at the sides, thrown up into well-marked transverse corrugations, sides rounded and with a short tooth-like angle in the middle; scutellum black, narrowly triangular ; elytra with the basal half bright scarlet, the rest dark metallic green, closely punctured, gradually tapering from the base, the apices narrow, slightly dehiscent, and subtrun-cate ; body beneath glossy bluish or greenish ; legs black ; antennae lemon-yellow, the two basal joints luteous. Length 12 lines. PACHYTERIA LAMBII. (PI. XLIII. fig. 6.) P. subglabra, subnitida; prothorace rufo; elytris subflavis, dimidio apicali pedibusque viridi- vel chalybeato-nigris; antennis subflavis, articulis quatuor basalibus nigris; corpore infra violaceo. Nearly glabrous, subnitid; head dark green, thickly punctured ; lip and mandibles dark glossy brown ; eyes black ; prothorax dull red, slightly sulcated anteriorly, closely punctured, the disk corrugated laterally, sides with a strong tooth-like angle ; scutellum black, narrowly triangular ; elytra lemon-yellow on the basal half, the rest black with a greenish tint, closely punctured, the dark posterior half very minutely, gradually tapering from the base, the apices somewhat narrow and slightly dehiscent; body beneath and legs dark blue- or violet-black ; antennae lemon-yellow, the four basal joints black. Length 10 lines. PACHYTERIA VIRESCENS. (PL XLIII. fig. 2.) P. subglabra, viridi-metallica; prothorace larte rufo-brunneo ; antennis flavis, articulis quinque basalibus, scapo excepto, nigris. Nearly glabrous, bright metallic green ; head closely punctured ; mandibles black ; prothorax of a rich chocolate-brown colour, doubly sulcated anteriorly, with well-marked transverse corrugations over the entire disk, the intervals finely punctured, the sides strongly angulated, the angle terminating in a short tooth; scutellum narrowly triangular; elytra gradually narrowing from the base, finely punctured throughout, the apices rounded; body beneath and legs glossy metallic green; antennae with the scape dark green, the four succeeding joints black, the remainder lemon-yellow. Length 14 lines. PACHYTERIA SPINICOLLIS. (PL XLIII. fig. 4.) P. hirsuta, brunneo• lutea ; capite prothoraceque arneo-fuscis, hoc |