none Researches carried out in 10 horticultural Piedmontese stations and in laboratory throughout the years 1978-1980 allowed to detect 14 species of Hymenopterous parasites of the Gracillariidae Phyllonorycter blancardella (F.): the Braconid Apanteles lautellus Marshall, the Encyrtid Holcothorax testaceipes (Ratzeburg), the Eulophids Elachertus inunctur Nees, Cirrospilus lyncus Walker, C. pictus (Nees), Sympiesis gordius (Walker), S. gregori Boucek, S. sericeicornis (Nees), Pnigalio mediterraneus Ferriere & Delucchi, P. soemius (Walker), Chrysocharis laomedon (Walker), C. nitetis (Walker), Achrysocharoides atys (Walker), Tetrastichus ecus (Walker). Of these, 7 were not yet reported in Italy for Ph. blancardella: H. testaceipes, E. inunctus, S. gregori, P. soemius , C. laomedon, C. nitetis, A. atys . The main ethological characteristics and the limiting action of the 14 species are briefly considered and discussed.