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Norway, 04,11.11

I have found two of these, both at night on the porch-light.

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Hello


I found that this looks like Syrphus ribesii, look at page 135 of the book "Colour guide to Hoverfly larvae" of Graham e Rotheray of the collection Dipterists digest No. 9.
http://www.dipteristsforum.org.uk/sgb_dipterists_digest.php?id=9
Best wishes

Pierre

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Thank you!