When org-1N+T+C.Scer\UAS.T:Ivir\HA1 is driven by Scer\GAL4dpp.blk1 normal or slightly enlarged eyes are seen. When org-1N+T+C.Scer\UAS.T:Ivir\HA1 is driven by Scer\GAL4dpp.blk1, mutant antennae are defective. The third antennal segment contains ectopic bristles at its distal part. The arista is transformed into tarsal structures with a claw at the distal end. When org-1N+T+C.Scer\UAS.T:Ivir\HA1 is driven by Scer\GAL4GMR.PF A loss of interommatidial bristles is seen, but ommatidial development appears normal.