STUDY ON THE COMPOSITION OF SPECIES AND BIOLOGICAL HARACTERISTICS OF STROBILOMYIA MICHELSEN IN THE DA XINGAN AND THE XIAO XINGAN MTS. LARCH CONE VOLATILE PROFILE AND ITS DAMAGE BY CONE FLY (STROBILOMYIA SPP.)IN NORTHEASTERN CHINA The Occurrence and Damage of Larch Cone Flies(Genus Strobilomyia)in Pangquangou Natural Reserve,Shanxi Province SOME BIOLOGICAL AND ECOLOGICAL CHARACTERISTICS OF STROBILOMYIA MELANIOLA (FAN) (DIPTERA:ANTHOMYIIDAE)