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A rare
species in Belgium, though observed in most provinces. Mainly known
from the Kempen in the province of Antwerpen and from the south of the
country.
The
larva bores into the stem of Betula, sometimes also
on Alnus.
The
adults fly from late April towards early August. They are active during
daytime.
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Belgium,
Luxembourg, Arlon, 14 May 2008.
(Photo © Jean-Yves Baugnée)
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