OCR Text |
Show 1887.] PHYTOPHAGOUS COLEOPTERA OF CEYLON. 69 Head closely granulate-punctate, black, the lower part of tbe face flavous. Antennae dentate from the sixth joint, the two or three lower joints flavous, the rest black. Thorax strongly raised posteriorly into an undivided hump, extremely closely and finely granulate-punctate, black; the hinder portion of the elevation as well as some indistinct spots placed anteriorly, fulvous; a more distinct similarly coloured spot is placed at each" side of the elevation. Scutellum transverse, its posterior margin emarginate. Elytra slightly constricted at the middle, of a more brownish colour, more strongly punctured than the thorax ; each elytron with an indistinct ridge from the middle of the base to the apex and joined by a shorter one commencing at the shoulder; the subsutural ridge is joined to the suture at the middle by a short transverse elevation, and ends near the apex in a strongly raised longitudinal tubercle; three other small and rather indistinct tubercles are seen within the elytral constriction at the sides ; the base of the femora is obscure fulvous ; the rest and the underside blackish ; the suture is dentate through its entire length. A single specimen. C. pallifrons resembles in general structure C. spilota, Baly, but is only half the size ; the thorax is more finely punctured and devoid of raised lines and tubercles, while those of the elytra are also much less distinctly raised and the interstices much more finely punctured. EXEMA CEYLONENSIS, Sp. UOV. Black; head strigose ; thorax strongly raised behind, with six elevated longitudinal ridges ; elytra strongly punctured, each elytron with an elevated ridge and about nine or ten tubercles ; pygidium with three longitudinal carinations. Length 1 line. Head closely covered with longitudinal strigse; antennae black, the sixth and following joints transverse. Thorax strongly raised into a pointed hump, rather closely and distinctly punctured ; each side with three longitudinal ridges, the middle pair running nearly parallel and not extending quite to the anterior margin, the second ridge strongly sinuate, the third the shortest and only extending to the middle of the thorax; there are a few short and obsolete elevations placed between the above-named ridges, connecting the latter here and there with each other. Elytra more deeply punctured than the thorax; each elytron with the following tubercles: one at the middle of the base, one at the shoulder, and another near the scutellum ; two transverse short ridges placed near the suture, one at the middle, the other below the latter and connected by an oblique ridge which runs from the basal tubercle to a little distance from the apex; another, shorter, oblique ridge extends from the shoulder to the middle joining the subsutural one; a tubercle is placed near the apex close to tbe lateral margin, the suture is serrate through its entire length ; the underside rugosely punctate. This little species, of which only a single specimen is before m e, |