Hym:Tenthredinidae
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Fenusa dohrnii (Tischbein, 1846)
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the larva has a pale brown head and is seen here in dorsal view
in ventral view the large prothoracic plate is seen, as well as two more spots on the meso and metathorax

 

Food Plant: Alnus glutinosa (Alder) and other Alnus (Alder) spp.

Mine: Bivoltine - early summer onwards. Trivoltine in a good year.

Notes: A large, brown upper surface blotch, initially between veins and running towards the margin.Very common. The larva has three ventral spots and pale ringed legs (as shown)

Pupa: Outside the mine.

Data: 24.vi.2005, Fleet, Hants, VC12

Image: © Rob Edmunds

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