worldwide, much more diverse in the Old World, >50% of spp. in Africa; in our area, most spp. are western (esp. southwestern) and ~10 spp. occur east of the Mississippi River, of which E. decora & E. dorcadion are transcontinental(1)
Cocoons of Sphecidae, Pompilidae and Tiphiidae. Also reported once for Scarabaeidae (Research.net. Yeates, D. The evolutionary pattern of host use in the Bombyliidae (Diptera): a diverse family of parasitoid flies)
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