The larva of the sawfly Heterarthrus microcephalus mines the leaves of willow with oviposition very near to the leaf tip. It eventually forms a large blotch mine, with little frass.
Where the host willow species are present.
The larval mines can be seen when the host plants are in leaf.
Pupation occurs within the mine in a large, transparent, discoidal cocoon.
Widespread but not well recorded in Britain.
Status in Leicestershire and Rutland not known.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015