Maximum likelihood consensus tree of Neosphecia cecidogena (LMCI 263-33) and related Melittiini taxa. The monophyly and relationships were inferred based on 668 base pairs of cytochrome oxidase subunit gene I (COI) sequences (using six species of Melittia, one from Synanthedon and Carmenta from databases; the later genera of the related subfamily Synanthedonini were surveyed as outgroups). Numbers above branches indicate statistical support (bootstrap values).