Thelaira leucozona is a species of fly in the family Tachinidae first described by Georg Wolfgang Franz Panzer in 1806.James E. O'Hara, Hiroshi Shima, & Chuntian Zhang. "Annotated Catalogue of the Tachinidae (Insecta: Diptera) of China." Zootaxa 2190 (2009): 1-236. It parasitizes moths such as Arctia caja by laying eggs in the larvae that eventually kill the host.
Distribution Great Britain, Czech Republic, Hungary, Latvia, Poland, Bulgaria, Italy, Serbia, Austria, France, Germany, Switzerland, Japan, Russia, Transcaucasia, China.
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