i found this insects in Slovenia. They are 5mm long or less. They look like some kind of beetle larvas. One more photo on this url. http://galerija.f...pos=-70902
Thanks for help!
Diptera larva for sure, and I think some kind of Platypezidae : see also http://www.dipter...d_id=17240. For some reason the Phorid Dohrniphora cornuta may be a possibility too, but I do not know that species.