Semilethal, lethality occurs during larval and pupal stages. Surviving males and females have fine bristles, lack the posterior vertical and scutellar bristle, wing veins L2, L3 and L5 are frequently netted at their distal ends and there are incisions on the inner wing margin. Males are fertile and females have a rudimentary ovary and a functional ovary which has a reduced number of ovarioles.
Kaufman.