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Tony is quite right, this is sudeticus.
Be warned, however, that some female sudeticus looked remarkably like bovinus (see Stubbs in British Soldierflies and allies for this matter, or my key if you can read dutch). So Chvala cs. are a little careless. Neverless, bovinus is never like sudeticus, and since this picture suggests a typical sudeticus, that's what it is !

Theo Zeegers