Leichosila wagneri is a moth of the subfamily Arctiinae first described by Christian Schmidt in 2009. It is only known from high-elevation forest (1,950 to 2,050 m) on Barva Volcano, Cordillera Central, Costa Rica.
The forewing length is about 13.5 mm.Schmidt, Christian. (2009). "A new genus and two new species of arctiine tiger moth (Noctuidae, Arctiinae, Arctiini) from Costa Rica". ZooKeys. 9: 89-96.
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