We came across this helpful article on myPMP(professional pest management).net. You can see an excerpt below or check out their website for the full article!

Fiction: There is no such thing as a ground hornet. Fact: All hornets are wasps, but not all wasps are hornets. True hornets belong to the genus Vespa. Only the European hornet (Vespa crabro germana, an introduced species) in North...