1866.] MR. F. P. PASCOE ON THE COLEOPTERA OF PENANG. 239 



IXAIS. 



Caput antice subtransversum, linea mediana ad orem attingente. 



Antennae perbreves, artieulis tertio et quarto subcequalibus, infra 

 fimbriatis. 



Elytra bast angusta, postice latiora, in medio elevato-convexa. 



Head rather transverse in front, the impressed median line ex- 

 tending from the vertex to the mouth ; antennarv tubers almost 

 obsolete. Eyes deeply divided, the lower lobe somewhat approxi- 

 mating 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 exceed- 

 ingly 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 ; ante- 

 rior 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 Ejrisomus pau- 

 peratus, Fab. (Curculio), a native of Sumatra, and probably extend- 

 ing 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 ; scutel- 

 lum transverse ; elytra seriate punctate, the punctures rather irre- 

 gular 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 co- 

 vered with a whitish pubescence ; antennae about half as long as the 

 body, closely pubescent, white, except the apex of the fourth and 

 all the succeeding joints. Length 6 lines. 



Cyardium. 

 Caput subtransversum, fronte sulcato. 

 Antennae breves, robustce, vix fimbriates, scapo obconico. 

 Prothorax capite paulo 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- 



