Rheocricotopus (Psilocricotopus) insularis Makarchenko & Makarchenko 2005

Rheocricotopus (P.) insularis Makarchenko & Makarchenko, 2005 Rheocricotopus (Psilocricotopus) insularis Makarchenko & Makarchenko, 2005: 129. Rheocricotopus (Psilocricotopus) insularis – Ashe & O’Connor 2012: 564. Type material Holotype RUSSIA – Sakhalin • ♂; Kuril Isls., Shashkotan Is., unnamed stream flowing down from Mt Pikovaya; 12 Aug. 1996; V. Teslenko leg.; FEBRAS. The type specimen of Rheocricotopus (P.) insularis was not examined. Distribution The present species has been known only from the type locality, the Russian Far East. Remarks The species was described based on a male from Shiashkotan Island, Kuril Islands in the Russian Far East. The male is similar to that of R. (P.) togakuroasi (Sasa & Okazawa, 1992: 105) in the following combination: antennal ratio near 1.0; humeral pit large and oval; wing with a slightly reduced anal lobe; relatively high foreleg ratio of 0.80. According to Makarchenko & Makarchenko (2005: 129), the male has two-grouped antepronotal setae medially and laterally, and an apically pointed, wedge-shaped inferior volsella. Although these features are unclear in the damaged holotype male of R. (P.) togakuroasi, the newly collected males from Japan possess lateral antepronotals only, and a triangular but apically rounded inferior volsella. The female and the immature stages are unknown until now.