The true identity of Periscelis winnertzii and description of P. laszloi sp. nov. from Europe (Diptera: Periscelididae)

The only preserved (damaged, sex unknown) type specimen of Periscelis (Periscelis) winnertzii Egger, 1862 has been revised and designated as a lectotype. Its revision revealed that P. winnertzii has recently been misinterpreted and is in fact identical with P. (P.) fugax Roháček & Andrade, 2017, syn. nov. Therefore, true P. winnertzii is re-diagnosed, with all its synonomies listed. Periscelis winnertzii auctt. (not Egger, 1862) is described as a new species, P. laszloi sp. nov., based on a series of specimens from Hungary (holotype), Portugal, Switzerland and Slovakia. An intersex specimen of P. laszloi sp. nov., female puparium and cephalopharyngeal skeleton of 3rd instar larva (ex puparium) of P. winnertzii (all from Hungary) are described and illustrated. Both species are also characterized by means of the barcoding region of COI, illustrated in detail (including structures of male and female terminalia) and their biology and distribution reviewed with new original data.