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A common species in Belgium.
The
larva makes a long, tortuous translucent lower epidermal mine with a
central brownish frass-line usually on Salix alba,
and later it mines into the petiole and twig and completing the mine
into a second leaf, where it creates another similar epidermal
mine. Pupation in a cocoon under a silk membrane, usually at
the margin of the leaf, which curls over to conceal it.
The
adults fly in two generations in July and again from late August till
next April, hibernating in thatch or hayricks.
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Belgium,
Brabant, Tielt-Winge, 14 July 2007.
(Photo © Adriaan Peeters)
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