Flies are shorter than normal and have broad, frequently pleated wings. Most macrochaetae are greatly reduced in length and thickness and are often abnormally inserted. Eye shape is slightly altered. Males are fertile and have approximately 10% wild-type viability.
RK3. Most bristles thin and short. Eye shape slightly abnormal. Body short; wings short, broad and frequently pleated. Male fertile. Viability about 10% wild type.