Wings are always completely unexpanded and are frequently drooped. Two symmetrical grooves are present on the pronotum immediately anterior to the wing base. The postscutellar bristles are frequently crossed. Eclosion is delayed. Males are fertile and have approximately 10% wild-type viability. Females are extremely inviable.
RK3. Wings always unexpanded, frequently droop. Two symmetrical grooves occur on the pronotum immediately anterior to wing base. Postscutellar bristles often crossed. Eclosion delayed. Male fertile; viability about 10% normal. Female extremely inviable.