Ichneutinae comprises 88 species of parasitoid wasps organized into three tribes and ten genera. Members are koinobiont endoparasitoids that attack sawfly and leaf-mining lepidopteran larvae. Suggested sister subfamilies attack larval Lepidoptera. The direction of host switching as well as the generic and tribal classifications have been controversial and will be addressed using molecular data (28S: D1-D5; COI; CAD) in conjunction with morphology. Molecular data were collected for 35 exemplars with an emphasis on problematic genera. Preliminary results using parsimony analysis of 28S (D1-D5 regions) and 15 exemplars (across eight genera) suggest Masonbeckia Sharkey & Wharton is paraphyletic and infer a basal host switch to sawfly larvae with a reversal to lepidopteran larvae. This is the first study to incorporate molecular techniques to examine the phylogenetic relationships of ichneutines.