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I'm probably too late for my comments to be of any value but there's a description at http://micropezid...my/term/67 and a good key is Bygebjerg, R., Munk, T., & Elnif, J. (2011). Chyliza leguminicola Melander, 1920 (Diptera: Psilidae) new to the Palaearctic fauna. Entomologiske Meddelelser, 79(2), 73–84.
Any chance you could post this on iNaturalist at https://www.inatu...tanypezids