Neolycaena (Rhymnaria) arcana sp. nov. from Tibet (Lepidoptera: Lycaenidae).

Neolycaena (Rhymnaria) arcana sp. nov. (Lepidoptera: Lycaenidae: Theclinae: Eumaeini) was discovered in an old collection of Lepidoptera in the National Museum in Prague and subsequently described from one male. This specimen undoubtedly originates from the period before 1950, and its label contains only 'Tibet'. The new species is morphologically similar to other taxa of the subgenus Rhymnaria Zhdanko, 1983 from which it clearly differs in the arrangement of dots on the underside of hindwings as well as in characters of male genitalia. Photos of the holotype and its genitalia are given. [ABSTRACT FROM AUTHOR]