A new fossil genus and species of fairyfly, Eotriadomeroides abjunctus Huber & Greenwalt, gen. sp. nov. (Hymenoptera: Chalcidoidea: Mymaridae), is described illustrated from a female preserved as compression in middle Eocene shale the Kishenehn Formation, Montana, USA. It compared to extant Neotriadomerus Huber, known only Australia, Triadomerus Yoshimoto, Cretaceous amber Canada. suggested...