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Show 1866.] MR. F. P. PASCOE O N THE COLEOPTERA OF PENANG. 239 IXAIS. Caput antice subtransversum, linea mediana ad orem attingente. Antennae perbreves, articulis tertio et quarto subarqualibus, infra fimbria tis. Elytra basi angusta, postice latiora, in medio elevato-convexa. Head rather transverse in front, the impressed median line extending from the vertex to the mouth; antennary tubers almost obsolete. Eyes deeply divided, the lower lobe somewhat approximating to the base of the mandibles. Antennae very short, entirely pubescent, scape ovate, the third joint very little longer than the fourth, both closely fimbriated beneath, the last seven joints exceedingly short. Prothorax subquadrate, its sides nearly straight. Elytra highly convex in the middle, narrower and depressed at the base, broadest posteriorly. Legs short, robust, nearly equal; anterior coxae exserted, their acetabula with a vertical angle. Pro- and mesosterna slightly raised, their opposing faces rounded. This genus is a modification of the Cenodocus form, differing principally in the shape of the elytra, the presence of a strongly impressed median line on the head, and the relative proportion of the third antennary joint. The only species which it contains at present is remarkable for its general resemblance to Episomus pau-peratus, Fab. (Curculio), a native of Sumatra, and probably extending to the opposite coast of Malacca, as it occurs also in Java. There are other genera of Longicorns which never fail to recall forms belonging to widely different groups. IXAIS EPISOMOIDES. (PI. XXVI. fig. 10.) I. supra fusco-grisea, infra albida; elytris seriatim punctatis, punctis oblongis, profunde impressis. Derm brownish testaceous, covered above with a thin greyish pile; head slightly punctured in front, two brownish stripes on the vertex, continuous with a broad central stripe of the same colour on the prothorax, the latter with crowded foveolate punctures ; scutellum transverse; elytra seriate punctate, the punctures rather irregular near the suture, oblong and very deeply impressed, with a few pale-testaceous granular elevations, principally at the base, the sides anteriorly and a few small spots white; body beneath and legs covered with a whitish pubescence ; antennae about half as long as the bodv, closely pubescent, white, except the apex of the fourth and all the succeeding joints. Length 6 lines. CYARDIUM. Caput subtransversum, fronte sulcato. Antennae breves, robustar, vix fimbriatar, scapo obconico. Prothorax capite paido latior, dente antico instructus. Elytra elongata, cylindrica. Head transverse in front, the forehead deeply sulcate; antennary tubers robust; eyes deeply divided. Antennae short, stout, pubes- |