Last modified: March 4, 2021, 3:36 p.m.
A fairly common and scattered species throughout Belgium.
Dark grey, head capsule pale brown, prothoracic and last abdominal segment darker brown.
Pupation in a silken cocoon in which frass is used.
The caterpillar constructs a loose, silken gallery under dead bark of various trees, preferably deciduous wood.
Pupation takes place between April and June in a silken cocoon covered with frass in the larval feeding place.
The adults are active in early morning sunshine, they hide during the rest of the day but come occasionally to light.
One long generation a year: from May till the end of July.
The caterpîllar feeds on decaying wood, lichens and fungi under the dead bark of various trees, like: Acer, Alnus, Betula, Carpinus, Corylus, Fraxinus, Larix, Picea, Pinus, Prunus, Quercus, Salix, Tsuga, etc. especially when the tree is infected with Armilleriella mellia. It has a preference for Carpinus betulus and Fagus sylvatica.
Open places with a lot of bushes, clearings and roads in forests, parks. The species seems to have a preference for deciduous forests in xerothermic habitats.