Okay, sorry for the absolutely horrible photo ... but I think this is new to the guide - Eurytoma gigantea, a parasitoid of Eurosta larvae (Tephritidae).
ID was based on this web page; a report by Ishizaki on the relationship between this species and its host fly can be found here.
In the image, it is resting on the surface of a gall. No ovipositing observed; it flew away before I could get another shot.