6.2-7.5mm. Body dark brown to black, form oval, strongly convex. Head with coarser punctures densely and evenly distributed, front margin of clypeus only with fine primary punctation; labrum, sides of clypeus and appendages on head reddish; maxillary palpi slender. Coarse punctures on pronotum sparsely distributed on disc more densely near lateral margins; basal corners narrowly angulate, pronotum finely margined; lateral margins inconspicuously reduced to rows of punctures, particularly near base; short(EI1.06), highly convex; elytral striae partly reduced to rows of punctures, particularly near base; short additional scutellary stria between 1st and 2nd stria; interbals flat to moderately convex near apex and sides, smooth and glabrous between punctures; coarser impressions on alternate interstices shallow and vague; lateral margins distinctly serrate.