note on the predatory hybotid fly genus Crossopalpus found at the Kerkini National Park in Greece with an illustrated key to the species occurring and expected in Greece

Six species of the genus Crossopalpus were collected during a recent survey in the Kerkini National Park in northern Greece. Three species are reported from Greece for the first time: Crossopalpus chvalai Kovalev, 1976, Crossopalpus flexuosus (Loew, 1840) and Crossopalpus humilis (Frey, 1913). A key is provided to the species occurring in Greece as well as those expected to occur in Greece. New illustrations of the male genitalia of all these species are given.