中文摘要：

简要记述了简脉茎蜂属的特征,编制了中国种类检索表。记述中国茎蜂科2新种：大斑简脉茎蜂Janus megamaculatus Liu＆Wei sp.nov.和黄褐简脉茎蜂J.rufus Liu＆Wei sp.nov.。大斑简脉茎蜂体型大,亮黄色,头胸部具很少量的黑色斑纹,腹部各节背板具暗褐色或黑褐色横带斑,中胸背板前叶中纵沟很深,锯鞘端等长于锯鞘基等,与同属已知种类均不相同。黄褐简脉茎蜂与西藏易贡分布的黄腹简脉茎蜂Janus xanthus Naito＆Smith,1998比较近似,但头胸部几乎全部黄褐色,触角褐色,较短,长约2倍于头胸部之和,后足股节黄褐色,后翅Rs室封闭,尾须短小,背面观长仅0.14倍于锯鞘端长等,与后者不同。

英文摘要：

The diagnosis of Janus Stephens 1829 and a key to the Chinese species of the genus is provided. Janus rnegarnaculatus Liu ＆ Wei sp. nov. and J. rufus Liu ＆ Wei sp. nov. are described from China. Janus megamaculatus sp. nov. differs from its known congeners by the body very large, head and thorax yellow brown with few black macula, the abdomen yellow brown with transverse black bands, the mesoscutal middle lobe with a deep middle furrow and the apical sheath as long as the basal sheath. Janus rufus sp. nov. is similar to Janus xanthus Naito ＆ Smith, 1998 in structure but differs from the latter by the head and thorax almost entirely yellow brown, the antenna brown and about 2 times as long as head and thorax together, the hind femur yellow brown, the cell Rs in hindwing closed and cereus 0.14 times as long as the apical sheath.