very rare and local species in Belgium. Known for a while in the southern part of the country, with a stronghold in the
province of Namur where it is locally not rare, and recently
discovered in Flanders in the province of Limburg (2005) and province of Antwerpen (2007).
larva makes a very typical brown blotch with fine concentric arcs on
the upperside of Quercus
leaves, sometimes also on Castanea. Pupation
place in a round chamber constructed in the larval feeding place. The
adults fly mainly in June and are taken occasionally at dusk, but more
often encountered as mines onwards from August till November. During
favourable years, a second generation
develops of which the moths are on the wing in August. The moths come
Namur, Lavaux St-Anne, 14 October 2006.
(Photo © Chris Steeman)