[16] Medium to large sized species, black or greenish black, with or without light ground markings mimicking bumblebees.

The head is much flattened and broader than the thorax.

The antennae are situated upon a prominent conical frontal process, The face is moderately produced below the eyes, downward or forward, in profile.

The abdomen is elliptical or very short oval.

[17] Larvae found in rot holes or decaying hardwoods [18]