The mimosa stem-mining moth (Neurostrota gunniella) is a moth of the Gracillariidae family. It is known from Costa Rica, Cuba, Mexico and Texas, as well as Thailand and the Northern Territory in Australia, where it was introduced in 1989 to control Mimosa pigra. The wingspan is about 8 mm. Adults are brown with a white stripe along the inner margin of each forewing. When in its rest position, it typically has its wings folded around the body, and its legs out.