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Thanks Jan,
O. ornata and trinotata seem to be very similar. I don't have and cannot find a description for ornata, so I have just the features given by Shtakel'berg who says ornata should also have palps darkened. So I can't be sure what this is. Probably ornata? But might be trinotata? As you say the European Odiniidae are a bit of a mess and need a review.