A rare species in Belgium.
larva lives in a roughed white-brown case on Achillea millefolium or A. ptarmica. Pupation in the case.
adults fly in one generation a year during July and August. They are
active at sunrise, in the evening and at night and come
infrequently to light.
Liège, Vivegnis - Canal Albert, 30 November 2009.
case on Achillea
(Photo © Jean-Yves Baugnée)