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There are several genera in which the females are often wingless (notably Epidapus, but also Trichosia, Parapnyxia and Pnyxia. The abdomen on this specimen looks odd, not like a typical male or female! Some Cecidomyiidae also have wingless females, but your antennae look more like Sciaridae, and I think I can see a tibial spur in one photo.