Entomologia Hellenica 20 (2011):75-81.

N.AG.RE.F., Institute for Mediterranean Forest Ecosystem Research, Laboratory of Entomology, Terma Alkmanos, 11528 Athens, Greece,Museum Requien, rue Joseph Vernet, F-84000 Avignin, France

The Nearctic assasin bug species Zelus reinardii was found for the first time in Attica, Greece, Europe. This species is a generalist predator which can contribute to the control of insect pests.  This is also a known predator of several biological control agents of pests. Therefore, its naturalization in Greece is potentially problematic in economic settings since the insect may act as both an intraguild and a beneficial predator. The risky nature of importation in other areas (e.g. Hawaii) showed the possibility of these ecological roles.