July 30. 1977 one of us (P.S.) observed in the "Amsterdamse bos", nr. Amsterdam, several individuals pertaining to this species. Later in the season the species appeared common at this locality, where it breeds in ditches with the vegetation of Ceratophyllum demersum, Spirodela polyrhiza and green algae, the former plant being used for oviposition. A male has been deposited in the collections of the State Museum of Natural History, Leyden. Further material has been recorded from Deventer, Overijssel Prov. (July-August, 1976; J. Bredenbeek) and from Naarden, Noord Holland Prov. (July, 1978; A. v.d. Hoogen).