lethal - all die before end of pupal stage | recessive
some die during pupal stage | recessive
visible | dominant
wing vein L1
wing vein L2
wing vein L4
wing vein L5
Wing veins L2, L4 and L5 interrupted or absent; extra bristles on proximal wing vein L1.
F.M.A. van Breugel, 1977.