ovipositor

The ovipositor is an organ used by some animals for the laying of eggs. In insects an ovipositor consists of a maximum of three pairs of appendages. The details and morphology of the ovipositor vary, but typically its form it is adapted to functions such as transmitting the egg, preparing a place for it, and placing it properly. In some insects the organ is used merely to attach the egg to some surface, but in many parasitic species (primarily in wasps and other Hymenoptera) it is a piercing organ as well.