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Here is my key. Sorry I can't space it out correctly

EUSTALOMYIA
Males and females
1 Legs and palpus partly yellow vittipes (Zetterstedt)
– Legs and palpus completely black 2
2 Arista long haired, the length of the hairs on upper and lower side are each equal to width of postpedicel. Median vitta of scutum widened behind into a rounded spot
hilaris (Fallén)
– Arista short haired or pubescent. Median vitta of scutum equally wide throughout 3
3 The length of hairing on arista in total equal to width of postpedicel. Hind tibia with 7 av-setae festiva (Zetterstedt)
– Hairing of arista significantly shorter, the arista is only pubescent. Hind tibia with 12 av-setae histrio (Zetterstedt)