Food Plant: Betula (Birch)

Mine: early Summer and early Autumn

Pupa: outside the mine

Notes: Formerly F.pusilla. The mine is a blotch on the upper side of the leaf. It starts by the midrib and extends towards the leaf edge. The larvae have four spots - the anterior spots being large (as shown) which distinguishes it from P.thomsoni. The amount of pigmentation can vary - the prothoracic plate in particular is lightly pigmented. The legs are banded.

Data: 03.vii.2005, Fleet, Hants, VC12

Image:© Rob Edmunds