V. Vikberg 1999: Crossocerus assimilis and Bethylus boops, two aculeate wasps new to the fauna of Finland (Hymenoptera, Crabronidae and Bethylidae). - Entomologica Fennica 10: 245-246.
Crossocerus assimilis (F. Smith, 1856) (Crabronidae) and Bethylus boops (Thomson, 1862) (Bethylidae) are recorded from southern Finland, Ta: Janakkala for the first time in Finland. Stigmus pendulus (Panzer) (Pemphredonidae) is reported from the provinces Ab and Ta in Finland.