Lepidostoma hirtum is widely spread throughout whole Europe
and European Russia.
The larvae inhabit rivulets, small and greater rivers, the lake
littoral and can even be found in brackish water (Botosaneanu &
Malicky 1978, Tobias & Tobias 1981, Waringer & Graf 1997,
Siebert 1998, Wallace et al. 2003). They are often found among roots
or debris of Alnus spp. (Siebert 1998).
Larvae as shredders and scrapers (Graf et al. 2002).
Adults are on the wing from June to September (Waringer & Graf