Distinguished from similar members of this family by the oblique markings resembling an inverted V on the abdomen segment 2.

Associated with Butterbur.

Mainly encountered in May and June.

The larvae of this species remain unknown, but other members of the genus are semi-aquatic, inhabiting accumulations of wet, organic matter.

A scarce species with records widely dispersed in England, South Wales and Scotland, becoming most frequent in northern England and Scotland.

Rare in Leicestershire and Rutland.