A new species of Aprosthema Konow(Hymenoptera:Argidae)with a key to Chinese species

平颜三节叶蜂属一新种暨中国种类检索表(膜翅目:三节叶蜂科)

A new species of Sterictiphorinae of Argidae is described from Zhejiang,China:Aprosthema brevivertexis Wei sp.nov.This new species is similar to A.tianmunicum Wei&Wen,2000 from Zhejiang,but differs from it by the following characters:the fore wing with a broad smoky band below pterostigma,the cell 1 Rs clearly longer than cell 2 Rs,the second abscissa of the vein Rs 1.3 times as long as the third abscissa of Rs,the postocellar area weakly elevated and about 2.2 times as broad as long,the malar space clearly shorter than diameter of median ocellus,the mesoscutal middle lobe without middle furrow and with a fine middle carina,the lobes of the apical sheath in dorsal view far remote from each other,and in lateral view the apex of sheath strongly acuminated.

记述采自浙江的膜翅目三节叶蜂科平颜三节叶蜂属1新种:短顶平颜三节叶蜂Aprosthema brevivertexis Wei sp.nov.。该种与同域分布的天目平颜三节叶蜂A.tianmunicum Wei&Wen,2000近似,但前翅翅痣下方具明显烟褐色横斑,1Rs显著长于2Rs室,Rs脉第2段1.3倍于Rs脉第3段长;单眼后区宽长比等于2.2,后部不高于单眼面;颚眼距稍窄于单眼直径;中胸背板前叶无中纵沟,具细纵脊;背面观锯鞘互相远离,侧面观锯鞘端部急尖等,与后者不同。