Variable, between 10 and 20 mm long and even up to 25 mm ; females are bigger than males.
Elongate insects, slightly flat dorso-ventrally. Eleven-articled, filiform antennae (longer in males than in females), longer than the thorax but, unlike many other long-horn beetles, much shorter than the rest of the body.
The heart-shaped prothorax has two flat, shiny outgrowths on its dorsal face. Elytra have a rough aspect and have stripes and spots of whitish bristles, more or less visible depending on the conditions in which the individuals died and were kept, and on their colour. The females’ ovipositor is usually quite visible.
Light brown yellow to very dark brown, more or less shiny.