O. Merkl szerk.: Folia Entomologica Hungarica 68. (Budapest, 2007)

the opinion of RlBAUT (1952). However, two of the subgenera, namely Diplocolenus s. str. and Erdianus are apparently of not monophyletic origin according to his phylogenetic tree. Since there was much confusion about the identity of several species of Diplocolenus (Erdianus) until recently, it seems useful to summarize the taxonomical history of two species closely related to the new species. Diplocolenus penthopitta (WALKER, 1851) (Figs 1-3) "Bythoscopus ?" penthopitta WALKER, 1851: 864. Type(s) female, "France", lost?, depository unknown. Acocephalus sudeticus KOLENATI, 1860: 390. Neotype male, "Moravia, Hr. JesenikPraded", Moravian Museum, Brno (KNIGHT 1974). Synonymized by KNIGHT (1974: 386). Remarks - The type series of D. penthopitta, described from France, is most probably lost. Unfortunately, also the type series of D. sudeticus was almost certainly destroyed (KNIGHT 1974). Consequently, KNIGHT (1974) designated a neotype of D. sudeticus from specimens collected at the typical locality and considered this species as junior synonym of D. penthopitta, however, without examined authentic specimens of the latter species. In his work on Diplocolenus, DLABOLA (1980) accepted sudeticus as valid species and regarded penthopitta as of doubtful identity. Later, GlUSTINA (1989) presented figures of the male genitalia of D. penthopitta based on specimens collected in Southern France and verified the synonymy presented by KNIGHT (1974). Distribution - Only sporadical records of the species are known. It was recorded from the Czech Republic (neotype of Acocephalus sudeticus), Austria (one female specimen: KNIGHT 1974) and France ("Hautes-Alpes", two localities: GlUSTINA 1989). The species seems to occur only in montane biotopes (1500-2100 m a.s.l.). Diplocolenus quadrivirgatus (HORVÁTH, 1884) (Figs 4-7) Deltocephalus quadrivirgatus HORVÁTH, 1884: 319. Lectotype (KNIGHT 1974: 384) male, "Pop-Iván" [now Romania] (Hungarian Natural History Museum). Deltocephalus nasti WAGNER, 1939: 168. Syntypes 1 male, 8 females, "Ostkarpathen", destroyed (KNIGHT 1974). Synonymized by KNIGHT (1974: 384).