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I'd agree that this is a Phaonia, but I'm not certain about the species.
Nikita - can you check whether there are any hairs (apart from the usual two bristles) on the notopleuron? These hairs will be quite small, and you will need a microscope to see them. If the notopleuron is bare then I'd go for zugmayeriae. If there are any small hairs (probably around the posterior bristle) then I think it may be trimaculata.
In Britain at least, zugmayeriae should have more than just the tip of the scutellum pale, and the humeri should also have a pale ground colour.