The fraction of Obp99bScer\UAS.T:SV5\V5; Scer\GAL4Act5C.PI females that fail to mate within 15 minutes of being placed with a wild-type male, is significantly less than wild-type females, and often run away from approaching males. The fraction of Obp99bScer\UAS.T:SV5\V5; Scer\GAL4Act5C.PI males mating within 15 minutes in the presence of wild-type females is no different from wild-type.