IntroductIon the biodiversity inventory is an urgent task for insect conservation, because many species are rapidly becoming extinct worldwide and our knowledge about them is scanty (Kim, 1993;Samways, 2005). Particularly, urbanization has severe effects on insect communities, resulting in decreased species richness (McKinney, 2008), or changes in the composition of species assemblages (Smith et al., 2006a). the modification of environments by humans is responsible for the introduction of an increasing number of species to new regions, where urban ecosystems provide opportunities to non-native (or alien) species to become established. consequently, these non-native species affect various ecosystem characteristic, often competing with or preying on native species (denys & Schmidt, 1998;McIntyre, 2000;Schowalter, 2006). In this context, the remaining and usually isolated green spaces (non-built-up areas) within urban environments are funda-