A NEW GENUS OF EULOPHIDAE (HYMENOPTERA, CHALCIDOIDEA) WITH REMARKABLEMALE GENITALIA

A new genus of the subfamily Entedoninae (Hymenoptera: Chalcidoidea: E ulophidae), Perditorulus, is described. Male genitalia in species of t his genus display extraordinary morphological differences to an extent which is unique in the Chalcidoidea, and the utility of this characte r and of male antenna in species identification is demonstrated. The v alue of male genitalia in chalcid systematics is discussed, and a poss ible reason for the exceptional development in Perditorulus is conside red. Perditorulus includes thirty-three species, unless otherwise stat ed from Mexico: abruptus, angustatus, avirostris, bidenticulatus, bifi dus, bilobus, calcaratus, crassis-capus, evanescens, falcispinus, fare tus, flexilis, geniculatus, grandiculus, hastatus, insternatus, langui discapus, longiparameratus, magnicaulis, mucronatus, parameratulus, pe nicillatus (Mexico, U.S.A., Canada), pilosus, pinguiscapus (U.S.A.), p laniscapus, porcodon, punctiscapus, sinuiscapus, trispinus, unispinus, verticillatus, woolleyi (Mexico, U.S.A.), and zolnerowichi. Perditoru lus is considered most closely related to Omphale Haliday.