【摘要】 记述采自记述中国三节叶蜂科三节叶蜂属1新种:白尾暗腹三节叶蜂Arge albocaudalica Wei,YanetHe,sp.nov.。本种与Arge xanthogaster(Cameron,1876)很相似,但腹部黑褐色,端部2节背板和锯鞘黄白色;后翅臀室柄短于后翅M室长,锯鞘背面观内侧切口很小,深度明显短于锯鞘侧叶端部宽;锯腹片14刃,第2节缝最长粗刺毛约等长于锯节宽度的3/4,节缝粗刺毛每节约9个,第8节缝最长粗刺毛等宽于该处锯节宽。定义了Arge xanthogaster种团,编制了该种团东亚地区已知种类检索表。更多还原

【Abstract】 Arge albocaudalica Wei,Yan et He,sp.nov.is described from China.This new species is similar to Arge xanthogaster(Cameron,1876),but differs from the latter as follow:1)abdomen black brown,the 8 th-10 th abdominal tergites and ovipositor sheath yellowish white;2)petiole of hind anal cell distinctly shorter than cell M;3)the two narrow middle incisions of sheath distinctly shorter than apical width of each lobe of sheath in dorsal view;4)lancet with 14 serrulae,the 2 nd to 8 th annuli each with about 9 lobe-like large spines,length of the longest spine in the 2 nd annulus about 3/4 breadth of the annulus,the length of the longest spine in the 8 th annulus as long as breadth of the annulus.A key to known species of Arge xanthogaster group from East Asia is provided.更多还原