Last modified: Feb. 25, 2021, 3:48 p.m.
A fairly common species throughout Belgium.
The larva lives in a case on tree trunks, especially Betula, Salix or pine trees. It pupates in the case attached to a twig or a tree trunk.
The females are apterous and live there entire life in the larval case.
One generation a year: from late May to July.
Forests, heathland, moorland.