a list of the ceratopogonid species from the sistema serrano de ventania, buenos aires, argentina is presented. six field trips were carried out sampling nine different localities. twenty five species of ceratopogonids belonging to eight genera were recorded; only culicoides venezuelensis and brachypogon (brachypogon) bonaerensis were known from the area. eight species are reported for the first time from buenos aires province and one from argentina.
