RESUME

Trypsin-like and chymotrypsin-like enzyme activities are present in midguts of adult workers, gynes, and males of the hornet Vespa crabto germana Christ ' The chymo-trypsin-like enzyme is the more abundant; both enzymes have activities that are linear over time. The chymotrypsin-like enzyme is inhibited by inhibitors specific for mammalian chymotrypsin. These results are wholly consistent with results of previously published studies on yellowjackets and paper wasps