Spider Parasitoids of the Tribe Ephialtini (Hymenoptera: Ichneumonidae: Pimplinae) in Italy and their Host Association

The list of ephialtine wasps (Hymenoptera: Ichneumonidae: Pimplinae) of Italy associated with spider hosts is presented here. Our comprehensive list includes twenty-seven species belonging to eleven genera compared to seventeen species and nine genera included in the previous checklist of the Italian fauna. Species can be separated into two ecological groups in accordance with the host type the first group includes pseudo-parasitoids attacking spider egg sacs; the second one includes koinobiont ectoparasitoids attacking adult spiders. The host association of wasps occurring in Italy was summarised from published and unpublished data. Zatypota discolor (Holmgren,1860) is new for Italy. Zaglyptus varipes (Gravenhorst, 1829) and Schizopya podagrica Gravenhorst, 1829 are recorded for the first time in South Italy and in Sardinia, respectively.