Two crane fly pest species, Tipula paludosa and T. oleracea, have been inadvertently introduced into North America from Europe where they are primarily pests in pastures. In North America, they have been reported causing damage in lawns in homes and recreational areas, on golf courses, and in cropping systems such as grass seed and peppermint. The two species differ in development and dispersal. Further studies on the two species are hindered by the challenge faced in larval identification. We will report on the molecular marker that we have identified for rapid species determination, and results of studies conducted on geographic distribution and host range for early management of these two pest species that are invading new regions in North America.