Hym:Tenthredinidae
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Heterarthrus nemoratus (Fallén, 1808)
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the pupa is formed in a disc

 

Food Plant: Betula spp. (Birch)

Mine: Summer

Notes: The older part of the mine is characteristically a red-brown colour and the mine contains little frass as the larva ejects it through a slit. The larva pupates in the mine in a disc structure (as shown). Mine shown on Betula verrucosa.

Data: 19.ix.2006, Fleet, Hants, VC12 ex mine 30/vii.2006, Etzen, Austria, Ewald Altenhofer

Image:© Rob Edmunds

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