Abstract
This paper presents the results of a study performed over a 6 years period (2002-2007) and its goal is to make an inventory of cynipid species found in Hemeiuş Reservation (Bacău), thus contributing to the completion of data regarding the gall cynipid fauna in Moldavian region. There were identified 18 species belonging to 4 genera, of which Andricus corruptrix (Schlechtendal 1870)♀♀ is mentioned for the first time in this area.