【摘要】 记述中国三节叶蜂属3新种:显著斑钳三节叶蜂Arge distincta Wei et Zhang,sp.nov.,红胫斑钳三节叶蜂Arge rufotibiella Wei et Zhang,sp.nov.和细角斑钳三节叶蜂Argetenuicornis Wei et Zhang,sp.nov.。3新种与Arge marginellia Wei,2002以及Arge basifusca Malaise,1947构成三节叶蜂属1新种团marginellia种团。编制了marginellia种团已知种类检索表。新种模式标本保存于中南林业科技大学昆虫模式标本室。更多还原

【Abstract】 Three new species of Arge Schrank are described from China:Arge distincta Wei et Zhang,sp.nov.,A.rufotibiella Wei et Zhang,sp.nov.and A.tenuicornis Wei et Zhang,sp.nov.A new species group of Arge marginellia group,is proposed for the three new species and two known species,A.marginellia Wei,2002 and A.basifusca Malaise,1947 based on their peculiar characters of wing maculae and shape of sheath.A key to species of marginellia group is provided.Type specimens are deposited in the Insect Collection of Central South University of Forestry and Technology,Changsha,China.Arge distincta Wei et Zhang,sp.nov.(Figs.1-5)Body length 9mm.It is a member of marginellia group and is similar to Arge marginellia Wei.It differs from A.marginellia in the forewing with a short and broad smoky macula below stigma,the flagellum of antenna gradually dilated toward apex and not shorter than hind tibia,its apex about 1.9 times as broad as the base,the vein a in hind wing with a long petiole behind vein cu-a(in later species,the forewing without a distinct smoky macula below stigma,the flagellum of antenna clearly shorter than hind tibia and tapering toward apex,the middle part of flagellum broadest and only 1.3 times as broad as the base,the vein A in hind wing with a very short petiole behind vein cu-a).Holotype ♀,Mt.Mao’ershan,(25°3’N,110°28’E;1600m),Guangxi,China,24 June 1999,coll.by XIAO Wei.Paratype 1♀,Xixiangchi,Mt.Emei,Sichuan,China(29°6’N,103°4’E;alt.2000m),19 July 2001,coll.by WEI Mei-Cai.Etymology.The specific epithet refers to the distinct fuscous spot of front wing.Arge rufotibiella Wei et Zhang,sp.nov.(Figs.6-10)It is a member of marginellia group and is close to Arge distincta Wei et Zhang,sp.nov.It differs from A.distincta in the forewing with a complete smoky cross band below stigma,the hind anal cell distinctly shorter than petiole of the cell,the supraclypeal area without middle carina and sparsely and minutely punctured,the lateral carinas of face very short and gradually disappeared downwards,not merged together,the frons quite flat and frontal basin absent,the malar space longer than diameter of the lateral ocellus,the hairs on pectus and legs pale brown,and the ventral margin of sheath distinctly concave upwards(in later species,the forewing without a complete smoky band below stigma but a short smoky macula,the hind anal cell distinctly longer than petiole of the cell,the supraclypeal area with a distinct middle carina and densely punctured,the lateral carinas long and merged downwards,the frons with a distinct central basin and lateral frontal walls,the malar space as long as diameter of the lateral ocellus,the hairs of the entire insect black,and the ventral margin of sheath straight).Holotype ♀,Jinding,Mt.Emei,Sichuan,China(29°31’N,103°20’E;alt.3076m),27 July 2006,coll.by WEI Mei-Cai.Etymology.The name of the new species refers to the color of its hind tibiae.Arge tenuicornis Wei et Zhang,sp.nov.(Figs.11-15)It is a member of marginellia group and is close to A.marginellia Wei,2002,but differs from the later one in antenna long and slender,the flagellum longer than hind tibia and not tapering towards apex,the broadest part of flagellum near the apex,the petiole of hind anal cell behind cu-a longer than half length of cu-a,the ventral margin of sheath curved,in dorsal view each lobe of the sheath quite narrow(in marginellia Wei,the flagellum clearly shorter than hind tibia and tapering towards apex,with the broadest part of it at the middle,the petiole of the anal cell behind cu-a very short and almost absent,the ventral margin of sheath straight,each lobe of sheath in dorsal view short and broad).Holotype ♀,Leidongping,Mt.Emei,Sichuan,China(29°32’N,103°19’E;alt.2400m),26 July 2006,coll.by WEI Mei-Cai.Etymology.The specific epcific refers to the slender antenna.更多还原