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Prealar seems absent, but I can't see if there is an av seta present or not on t2.
It has a similarity with D. albula but this species don't have such dark vitta in female, and I even don't rule out Botanophila... so I think I have to see this species in hand.
I'll let you know the result.
(or Ackland must recognize this species.....)

Johanna