Last modified: Nov. 6, 2023, 4:21 p.m.
A rather rare species in Belgium, most observations in the north of the country.
The larva is partially carnivorous, living on other insects, pupae or larvae.
The larva lives in the stems of the host plant. Hiberates as a larva and pupates in a broken reed stem. The adults come to light.
The adults have been observed from early June till late August in one generation.