Impact of the stand characteristics of Pinus densiflora pure forests on the infestations of Cephalcia kunyushanica in Kunyushan region STUDIES ON THE BIONOMICS OF CEPHALCIA TIANMUA MAA Imapct of Kunyushan Web-spinning Sawfly Feeding on Growth of Japanese Red Pine A New Species of the Genus Cephalcia (Hymenoptera:Pamphiliidae) from China Analysis of Inter-Specific Correlation of Cephalcia kunyushanica and Tree Layer Plant Species in Natural Forests in Kunyushan Study on Larva l Bio-ecology and ControlMethod of Cepha lc ia pin ivora( Hymenoptera: Pamphiliidae)