Present throughout Belgium, though mainly occurring rather local.

The larva lives in a loose, silken gallary under dead bark of various trees, like Quercus, Fraxinus, Larix, Pinus, Picea abies, Tsuga heterophylla, Prunus, Corylus, etc. especially when the tree is infected with Armilleriella mellia. Pupation in a silken cocoon covered with frass in the feeding place.

The adults fly during May and June. They are active in early morning sunshine and hide during the rest of the day.