Prioninae

Body 18–25 mm in length, shiny black and sub-glabrous throughout. Head 1.5 times as wide as long, widest at eyes, straightly convergent posteriorly; front and vertex roughly, irregularly, and deeply punctured; median groove distinct between eyes. Eyes small, in dorsal view transversely oval, twice as wide as long and about a fifth of head width; interspace between eyes wider than twice eye width. Antenna short, string-formed, approximately half of body length in male and a third of body length in female; antenna thickest at first antennomere, becoming thinner towards apex. Mandible about 2/3 of head length, roundly curved inward, shortly but acutely pointed apically, with two obtuse inner teeth. Pronotum sub-rectangular, approximately one and a fifth as wide as long, much wider than head or elytra; ventral side flat, dorsal side convex and minutely granulate. Scutellum transversely lunate, width greater than half length of posterior pronotal margin, sparsely punctured. Elytra oval, widest at middle, humeral width about half of maximum width. Legs long and slender, shiny and smooth; tibia depressed, femora stout, surface without spines or setae. Tarsi narrow, fifth tarsomere longer than total length of basal three tarsomeres. Abdominal sternal segments 1 to 5 sub-equal in length, first narrowest, gradually widened towards fifth which is widest.

Literature