Geotomus petiti (Wagner, 1954) is recorded for the frst time from Belgium. Information on the other Belgian representatives of the genus is summarized. Geotomus elongatus is only known from Liège province and the records of Geotomus punctulatus are doubtful.
During the two past decades, various nonindigenous species of Heteroptera (Insecta, Hemiptera) were collected for the first time in Belgium. We provide an annotated checklist of these exotic species and we briefly discuss the potential consequences of their presence in our country.