The wingspan is 12–16 mm. Adults have been recorded on wing from May to July.
The larvae feed on Picea abies. They mine the leaves of their host plant. They live in a silken tube covered with fragments of bark and lichen. The tube is made on a second-year twig. From within this tube, the basal half of several leaves is mined. Pupation takes place outside of the mine under the ground. Larvae can be found from May to June. They are reddish brown to chocolate brown.