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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.
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