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Is Delia albula a leaf miner in Atriplex?

Delia echinata larvae move through stems between leaves. Adult males have at least 2 av, 4 ad, and 3 pd on hind tibia. A few members of the Pegomya (Pegomya) hyoscami species group are leaf miners in Chenopodiaceae. Those are the only Anthomyiidae I know of that might have come out of your leaf mines. A picture of the 5th sternite might help ID.