Macrochaetae are short and very thin. Microchaetae are reduced in size and number. Wings are more rounded at the tips than normal, with the veins slightly thickened, and the margin is occasionally interrupted. The trident pattern is more pigmented than in wild-type flies. Males are viable and fertile, females are sterile.

male viable male-fertile female-sterile. RK2. Bristles short and very thin. Hairs small and sparse. Wings more rounded at tips, margins often incised; veins slightly thickened. Trident pattern slightly darker than wild type.