This species may at once be recognized by the black color of the deeply emarginate median lobe of the prothorax. Length 24 mm., breadth at the shoulders 11,5 mm. — Shining green, in some lights with a faint yellowish red tinge at the pronotum and the basal half of the elytra; the extreme tips of the clypeus, the median lobe of the prothorax, the extreme base of the elytra along the sides of the median thoracical lobe, and the tibiae and tarsi black; the palpi and antennae, except the club of the latter, dark pitchy; the first joint of the antennae bronzy green above, the club brown with a metallic hue.