Megachilidae

Osmia (Osmia) tricornis (Latreille 1811)

Previous Reports: Alfken (1929)

Distribution: West Mediterranean Basin, Corsica, and Sardinia.

Osmia tricornis has often been confounded with closely related O. kohlii, which occurs in Malta and Sicily. However, these two species show an allopatric distribution (Müller, 2015).

Megachile argentata (Fabricius, 1793)

Previous Reports: Valletta (1971)

Distribution: Algeria, Hungary

The species M. argentata has often been confounded with Megachile leachella (Curtis, 1828) (Schwarz and Gusenleitner 2011), but the latter has not been recorded from the Maltese Islands. M. leachella is present in Continental Europe and North Africa.