Echthrodelphax fairchildii Perkin (Hymenoptera: Dryinidae) is an infanticidal koinobiont semi-solitary ectoparasitoid of planthoppers in the paddy fields. The female lays an egg under the forewing bud of the host for one parasitism bout, but two adults often emerge under superparasitism with short first-to-second oviposition intervals. The female often moves the abdominal tip to the non-oviposi…