A new species of Neolasioptera (Diptera: Cecidomyiidae) from Parkinsonia aculeata (Leguminosae) in Argentina for possible use in biological control in Australia, with a key to Neotropical species of Neolasioptera

Neolasioptera aculeatae Gagné (Diptera: Cecidomyiidae) is described as a new species from stem swellings on Parkinsonia aculeata L. (Leguminosae) in NW Argentina. The new species appears to be a good candidate for the biological control of its host in Australia, where the plant was accidentally introduced and is currently a serious pest. The species is shown to be distinct from its 64 Neotropical congeners. A preliminary key to these species is offered that can be adapted as more work is done on Neolasioptera.