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It is a South American species ("Een ♂ uit Argentina"). I do not know of any key to species or review of South American Anthomyia. When Pont compiled the catalog of tropical American Anthomyiidae in 1974 he wrote "There is no modern revisionary work on Neotropical Anthomyiidae, either at the generic or the specific level".

There are several South American Anthomyia with three dark stripes on the thorax. I do not have all the descriptions. Stein did not distinguish his 1911 species from van der Wulp's albostriata. His virgata and albilamellata are probably not your flies, the first being truly holoptic and the second having more brownish stripes, but they are similarly marked. I do not have Albuquerque's 1959 paper.

See https://doi.org/1...60/15.1.93 for some of the variety of Brazilian Anthomyiidae. There is a tendency to spotted wings in Anthomyia.