Wings vary from clublike to straplike, seldom exceed 30% of normal length, and lack veins and specific bristles. Halteres 25-50% normal length. Postalar, scutellar, and dorsocentral bristles missing. Hind legs sometimes deformed. Few ap6/ap6 or ap4/ap6 females survive past 5 days; those that do are slightly fertile, the remainder are not (FBrf0017003). ap6/Df(2R)M41A4 more extreme than ap6/ap6 but some females fertile and thoracic chaetotaxy more nearly normal. Phenotype ap4-like. RK2.
Faulhaber.