An unusual genus and species of Encyrtidae (Hymenoptera: Chalcidoidea) from Australia reared from soft scale insects (Homoptera: Coccidae).

Arketypon vaderi gen. et sp. nov. is described from Australia and its systematic position is discussed. It was reared as a gregarious endoparasitoid of Myzolecanium sp. (Hemiptera: Coccidae) found in the nest of Camponotus sp. (Hymenoptera: Formicidae) nesting in a hollow stem of Sonneratia alba Smith (Sonneratiaceae).