O. Merkl szerk.: Folia Entomologica Hungarica 66. (Budapest, 2005)

100 Fig. 1. Frequency of occurrence of species of Nepomorpha in the samples taken between 1984-2002 by present authors. Abbreviations are derived from the names in Table 1 Fig. 2. Frequency of occurrence of species of Gerromorpha in the samples taken between 1984-2002 by present authors. Abbreviations are derived from the names in Table 1