Thryogenes festucae (Herbst, 1795)
Larvae and pupae in the stems, also below the water level; generally obe larva per stem.
Univoltine; the adult beetles hibernates anong plant debris along the shore.
distribution within Europe
Extensively described by Gosik (2011a).
Dieckmann (1986a), Gosik (2011a), Rheinheimer & Hassler (2010a).