Abstract: The predation behavior of Agistemus terminalis and Amblyseius sojaensis on Panonychus citri was studied under scanning electron microscope. Agistemus terminalis grasped egg stalk by claws and sensory organ of palpi and direct attack on eggs was done by needle-shaped stylets extruded from the rostrum. A distinct hole was found on the egg surface produced by the penetration and successive withdrawn of the rostrum and stylets. Finally, the hole became wide by the further attack of rostrum and palpi. Amblyseius sojaensis predated on the larvae and adults of P. citri. It grasped the anterior portion of the prey body by palpi and legs. Several sharply pointed and bent setae of palpi invaded into the cuticle of the prey. The prey was then attacked by the chelicerae and the cuticle was lacerated. The drawing of body fluid occurred by the extended malae which were positioned between the corniculi and the chelicerae.