RK2. Adults are smaller than normal, and emergence is delayed. Male viability is only approximately 50% of wild-type. Eye colour: dull red. Body colour: extra pigmentation, particularly in the thorax (a marked trident pattern is seen).
Small fly with dull red eyes and extra body pigmentation; trident pattern especially marked. Delayed eclosion. Male fertile and viability 50% wild type; mk/+ daughters, but not mk sons of mk mothers survive (Mohler, 1977). RK3.
Fahmy, 1950.