Hym:Tenthredinidae
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Heterarthrus vagans (Fallen, 1808)
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the prepupal stage loses pigmentation

 

Food Plant: Alnus glutinosa (Alder) and Alnus cordata (Italian Alder) Alder)

Mine: Univoltine: autumn.

Pupa: Inside mine in a disc shaped cocoon.

Notes: In the winter it enters a prepupal stage (as illustrated), losing its pigmentation.

Data: 20.iii.2005, Fleet, Hants,VC12

Image:© Rob Edmunds

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