Elongate; head, antennae, and elytra black; pronotum red. Head: vertex and front densely punctate; slightly depressed between eyes; medial sulcus absent; frons not projecting. Antennae: filiform; segment I clavate, subequal in length to III; II-III cylindrical, II shorter than I or III; IV-X transverse, decreasing in length; XI rounded at apex; I-II punctate; III-XI setose. Pronotum: subquadrate; convex; slightly depressed behind middle; sparsely punctate, punctures subovate, large; sides margined, narrowly canaliculate, straight and parallel for basal half, then convergent; anterior angles acute, produced; posterior angles rectangular. Scutellum: pentagonal, micropunctate. Elytra: wider than base of pronotum; sides margined, smooth, nearly parallel; apices rounded, cojointly emarginate at suture; apical margin minutely serrulate; subconvex, slightly flattened at suture; each elytron with 11 striae at base; punctures large, deep; punctures near apex smaller and less impressed than those on disc; lateral margin slightly reflexed. Venter: black; pro-, meso-, and metasterna smooth in middle, punctate at sides; abdominal sterna 1-4 punctate at sides; 1 and 2 fused in middle; 4-5 setose; last abdominal segment broadly truncate-emarginate, middle sinuate in male. Legs: femora and tibiae punctate; tibiae with fringe of setae at apex. Total length: 5.1-5.3 mm.