Abstract
A new facultatively cavernicolous planthopper species Borysthenes hainanensis sp. n., from Hainan Island, China, is described and illustrated. Specimens collected from lava tubes and above ground were found to be the same species but males of the former have smaller eyes. Distribution maps of the new and other species are given together with a checklist to all Borysthenes species and a key to Chinese ones. Type images of most Borysthenes species are also provided including Borysthenes dilectus (Walker), comb. n.
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