Polydrusus formosus
This was swept from a Walnut tree. I keyed it using Duff. Note that the live photos below have come out looking more yellowy-bronze and less green than it looked in life (or in the photos taken through the microscope).
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Polydrusus formosus showing rostrum from above and side, antenna, head from above, fore femur and elytral scales, Wendling Beck Environment Project (Norfolk, UK), 27th May 2025