Hym:Tenthredinidae
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Heterarthrus microcephalus (Klug, 1818)
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the larva makes a characteristic disc
the disc can be seen towards the left, straddling the midrib of the leaf

 

Food Plant: Salix spp. (Willow)

Mine: Summer and Autumn

Pupa: In the mine in a large transparent cocoon (as shown)

Notes: Forms a large blotch mine, with little frass.The larva has short legs.

Data: 13i.x.04, Fleet, Hants, VC12

Image:© Rob Edmunds

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