I believe I have gotten both species of adult wasps from the same fly puparium . In nature, fly maggots enter the soil to pupate. While you are waiting for me to add to this page, you will want to visit a Cornell University site which offers photographs and descriptions of important pests and natural control agents. Life cycles, habits, factors affecting biological control, and commercial sources are given. All of them.
Irish potato is a potato so the adjective is separated from the noun.