STUDIES ON THE LARCH SAWFLY PRISTIPHORA ERICHSONII(HYMENOPTERA TENTHREDINIDAE)I. BIOCECOIOGY AND CONTROL OF THE LARCH SAWFLY A NEW SPECIES OF HETERARTHRINAE FROM CHINA (Hymenoptera, Symphyta, Tenthredinidae) FOUR NEW SPECIES OF SAWFLIES FROM CHINA (HYMENOPTERA,SYMPHYTA:PAMPHILIIDAE,TENTHREDINIDAE) Studies on the Bionomics and Methods of Control of Chinolyda flagellicornis (Hymenoptera, Symphyta, Pamphiliidae) Two New Sawflies of the Genus Gilpinia in China (Hymenoptera, Symphyta, Diprionidae) A New Species of the Genus Cephalcia (Hymenoptera:Pamphiliidae) from China A New Species of the Genus Megabeleses from China (Hymenoptera, Tenthredinidae) Two New Species of Sawflies from China (Hymenoptera,Tenthredinidae) A New Species of the Genus Diprion(Hymenoptera:Diprionidae) from China The ghost of the Cretaceous terrestrial revolution in the evolution of fern–sawfly associations