Morphology of antennal sensilla and their distribution were investigated in male and female adults of Ooencyrtus nezarae, an egg parasitoid of Riptortus pedestris, using scanning electron microscopy. Antennae of O. nezarae was composed of scape, pedicel and seven flagella in both sexes. Six types of sensilla (s. trichodea, s. basiconica, s. chaetica, s. campaniformia, s. sickle-shaped and unknown s.) were identified from both sexes. Among them, s. trichodea and s. sickle-shaped were multiporous, others are not. They distributed in varying numbers. Sexual dimorphism was clearly observed in the distribution of s. trichodea (only on male antennae) and unknown sensilla (only on female antennae). These findings would be helpful for further studies on detailed sex specific-receptive functions of each antennal sensilla.

• Gwang Hyun Roh(Institute of Agriculture and Life Science)
• Su Bin Jo(Department of Plant Medicine (BK21+ Program), Gyeongsang National University)
• Yeon Jeong Lee(Department of Plant Medicine (BK21+ Program), Gyeongsang National University)
• Chung Gyoo Park(Institute of Agriculture and Life Science, Department of Plant Medicine (BK21+ Program), Gyeongsang National University)