A large species, strongly resembling the South-American Callichroma suturalis Fabr. It differs however from that species, besides by the generic characteristics, by the glabrous (not velvety) thorax and scutellum, by the shortened glabrous sutural stripe, etc. Length 40—50 mm., breadth at the shoulders 10—12 mm.; length of the antennae 120—150 mm. — Above metallic green, strongly shaded with coppery and purplish tinges. Beneath purple. Antennae and legs dark steelblue, the former with green tinges; mandibles, upperlip and apical margin of the abdominal segments black, the mandibles shaded with green at the base.