MilliBase

placed genus in tribe Polidrepanini. Delarthrum Attems, 1936 has hitherto remained monobasic, with D. obscurum Attems, 1936, from Pun- jab, Pakistan being the type, and sole, species [Attems, 1936]. Jeekel [1980a] first allocated this genus in the tribe Polydrepanini, putting emphasis on a well-devel- oped and elongate gonopod femorite, versus a strongly abbreviated one observed in Alogolykini, the second constituent tribe of the subfamily Alogolykinae. A lit- tle later, however, Jeekel [1980b] reshaped both these tribes and assigned Delarthrum to the Alogolykini on account of an untwisted gonofemorite which retains the seminal groove running on its mesal side alone, versus a strongly twisted, helicoid femorite supporting the seminal groove largely on the lateral side as seen in the Polydrepanini. Both tribes have recently been rede- fined: a strong, rod-shaped solenomere versus a thin, flagelliform one remains the basic difference between the tribes Alogolykini and Polydrepanini, respectively [Likhitrakarn et al., 2013]. This distinction, however, is often far from clear-cut. For instance, numerous species of Alogolykinae demonstrate slender, but ribbon-shaped solenomeres which are kind of intermediate between really thick and rod-like, on the one hand, and clearly flagelli- or filiform conditions, on the other hand.