Flies are smaller than normal with smaller, slightly rough eyes. Wings are slightly divergent or upheld, and are abnormally shaped with an occasional incision in the wing margin. The macrochaetae are slightly shorter and thinner than normal, with one or both postscutellar bristles frequently being absent and a dorsocentral bristle occasionally being missing. Abdominal segmentation is variably deformed and abdominal microchaetae are fewer than normal and deranged. Male viability is approximately 50% of wild-type.

Small fly with small, slightly rough eyes. Wings slightly divergent or upheld, abnormally shaped with occasional incision of the inner margin. Bristles slightly thinner and shorter with one or both postscutellars frequently absent and a dorsocentral occasionally missing. Abdominal segmentation deformed to various degrees; abdominal hairs fewer and deranged. Males poorly fertile; viability about 50% wild type. RK2.