Crematogaster scutellaris is a medium-sized species with a dark brown to black body contrasting with a shiny reddish head. The species is relatively common and dominant component of Mediterranean Europe’s ant fauna (Marlier et al., 2002), and is frequently introduced into central and northern Europe (Boer & Vierbergen, 2008; Klotz et al., 2008a; Rasplus et al., 2010). López-Sebastián (2004)provides a brief review of the biology of C. scutellaris. The nests are made of chewed wood and soil. in a large variety of microhabitats, including dead wood, human structures, and even stone walls (Soulié, 1956;1961 (1960)). The colony founding is independent, and colonies can live for several decades. All the workers are believed to be sterile (Casevitz Weulersse, 1991). The diet of the species is not well studied, but it is known to be an avid tender of hemipterans and will also take living and dead arthropods. Crematogaster scutellaris makes strong chemical trails used for recruiting large numbers of foragers that form conspicuous columns (Soulié, 1961 (1960)).