A New Species of the Genus Diprion(Hymenoptera:Diprionidae) from China

In the present paper a new species of the genus Difrion,D.jingyuanensis is described,which is a serious pest of Pinus tabulaeformis Carr.in Gansu and Shanxi Provinces in China.Diprion jingyuanensis sp.nov.Female: Head black;antenna black with scape and pedicel yellowish;palpi deep yellow;mandible dark red except for dorsal surface.Thorax black with prothorax deep yellow;wing hyaline;stigma yellow apically and black basally,in the black part there is a white spot;veins dark yellow,Abdomen black with terga 1,2,8,lateral parts of tergum 3;and sterna 3～5 deep yellow.pubescence on head and thorax deep yellow.Anterior margin of clypeus deeply and arcuately emarginated;rami of segments 7 to 11 about as long as each length of their respective segment;median fovea oval,moderately deep;lateral,coronal and transverse sutures distinct;OOL:POL: OCL=2:1:1.3.pubescence on clypeus,prothorax and mesonotum longer and denser,Lancet as in fig.1-1.punctures on head and thorax coarse and dense,nearly rugose;punctures on abdominal terga very sparse,on lateral parts of terga and sterna dense and coarse.Body length about 10 mm;antenna 21 to 23-segmented,apical 2～3 segments without raml.Male:Color of head,wings and pubescence similar to female;thorax and abdomen entirely black;legs black with tibiae and tarsi deep yellow;rami of segments 1 to 11 each about 10 times length of their respective segment;OOL :POL:OCL=2.6:2.6:1;punctures on thorax coarser and denser,rugose;punctures on abdomen coarser and more numerous.Penis valve as in fig.1-2.Other characters as for the female.Body length about 8 mm;antenna 23-segmented,with apical 1～2 segments without rami.Holotype♀,Gansu Province,Jingyuan County,30.Ⅵ.1989,Zhang You leg;Allotype♂,same data as for holotype.Paratypes 4♀♀,1♂,same data as for holotype.Paratypes 13♀♀,2♂♂,Shanxi Province,Qinyuan County,Ⅳ,1992～1993,Zhao Jinlong leg.The type specimens are deposited in the insect collection of the Forest Protection Research Institute,the Chinese Academy of Forestry.Hosts:Pinus tabulaeformis Carr.The new species resembles Diprion liuwanensis Huang et Xiao,but differs from the latter in the color of the fore wing and the lancet and penis valve.