A report on two alien invasive species of the genus Sceliphron Klug, 1801 (Hymenoptera Sphecidae) from Sicily, with a brief faunistic update on the native species

Two alien invasive species of the genus Sceliphron Klug, 1801 (Hymenoptera Sphecidae) were recently found in Sicily: S. caementarium (Drury, 1773) is recorded from Sicily (Messina province) for the first time; S. curvatum (F. Smith, 1870), previously recorded from Sicily only through generic data from literature and only one locality in a web forum of amateurs, is confirmed as definitely established in the Island. The Regional distribution of both alien species in Italy is revised based on data taken from literature and reliable reports from web forums. A brief faunistic account on the three native Sceliphron from Sicily is provided: S. destillatorium (Illiger, 1807) and S. spirifex (Linnaeus, 1758) are both new for the Aeolian Islands (respectively reported for Panarea and Vulcano).