Last modified: Jan. 20, 2021, 5:36 p.m.
A rather common species in most areas of Belgium, especially in the Kempen region and the eastern part of the country.
The head and neck-shield are yellowish, the neck-shield much less spotted, on the head only 1-2 blackish spots in front on each half.
The adults fly from late June towards late August, occasionally there is a small second emergence from early September till early October. They are active at dusk and later come to light and sugar.
The larvae live gregariously in a conspicuous spun web over the leaves of several Quercus species, preferably on saplings. Pupation in the feeding place.