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This bigger one looks a bit like a Syrphidae. If I look in Rotheray's 1993 key (see: https://diptera.i...p?cat_id=4) it shows some resemblance with Ferdinandea or Eumerus, but Ferdinandea appears to be related to sap runs, but Eumerus lives in plant bulbs. I also cannot rule out Cheilosia who may look like the other two, but differs in minute details of the anal segment and mandibles.