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Hi everyone,

the white spot is similar to Hydrotaea pellucens. borussica and meridionalis males have a very noticeable brush of feathery bristles sticking out of the middle of the hind tibia. I think that Hydrotaea pellucens is a better match. The photos posted are ridiculously small for debating features, so the author of the post will have to examine larger photos for comparison to Hydrotaea pellucens.

Best wishes,
John