Last modified: May 7, 2021, 9:47 a.m.
A very rare and local species in Belgium, observed most frequently on xerothermic hillsides in the southern part of the country.
Species with pronounced sexual dimorphism: male usually larger (wingspan 14–16 mm) than female (wingspan 11–14 mm). Antenna of the male rough-scaled, minutely ciliate; female with antenna simple.
Forewing ground colour cream-white, markings ochrous-brown sprinkled with black. Hindwing pale brownish grey. Variation limited.
Resembles a Cnephasia species but has a dark fascia at the base of the forewing.
The adults are active at dusk and later come to light.
The adults fly in one generation from late April untill the end of July.
The larval food plant is little known. In captivity, larvae fed on Crataegus and Ulmus from a silk tube on the underside of a leaf. The pupa has been beaten from Crataegus, potentially a larval food plant. Also Quercus and Acer are mentioned.