De Beekrombout (Gomphus vulgatissimus Linnaeus)) in het stroomgebied van de Dommel in 1998

The status and habitat of a poorly known population of Gomphus vulgatissimus south of Eindhoven in the province of Noord-Brabant is discussed. It is found in a typical lowland stream with clear, unpolluted water and with a characteristic assembly of brook inhabiting plants, insects and fish. The population appears to have grown, possibly as a result of a structural restoration of the stream in 1994. An unequal sex-ratio, 58% of 102 collected exuviae was male, is possibly explained by the early search dates (10 tot 23 May 1998).