The parasitic wasp genus Nasonia (Hymenoptera: Pteromalidae) contains three of the most thoroughly studied species of insects. Extensive studies have been conducted on their reproductive behavior, mechanisms of host interactions, and developmental cytobiology. Nasonia is the only parasitic wasp for which the entire genome is currently being determined. All three species are persistently and consistently infected by two species-specific strains of Wolbachia bacteria inducing cytoplasmic reproductive incompatibility with differently infected or uninfected females. However, it is ironic that the evolutionary relationship between Nasonia and other genera of the very diverse family Pteromalidae has not been thoroughly examined. I present molecular and morphological evidence establishing that Nasonia is a close relative of one species group of the large genus Trichomalopsis that has intriguing biological and morphological variation that sheds new light on what is known about Nasonia.