中国小腹茧蜂属二新种记述(膜翅目,茧蜂科,小腹茧蜂亚科)

记述了采自黑龙江、吉林、辽宁和湖北省小腹茧蜂属M.icrogaster Latreille，18042新种，短管小腹茧蜂M.breviterebrae sp．nov．和长距小腹茧蜂M．longicalcar sp．nov．。短管小腹茧蜂M.breviterebrae sp．nov．(♀)与M．grandis相似，但以下特征可以区别：1)翅痣下方具暗斑(后者无)；2)触角端前节长为宽的1．2倍(后者为2倍)；3)头顶光滑(后者具皱纹)；4)腹部第3背板光滑(后者具皱状刻点)；5)后足胫节黑色(后者红黄色)。采自黑龙江镜泊湖、吉林长春、辽宁(阜新、大连、沈阳)。长距小腹茧蜂M．longicalcar sp．nov．(♀)与短管小腹茧蜂M.breviterebrae sp．nov．相似，但以下特征可以区别：1)1—RS脉长为1—M脉1／2(后者为1／3)；2)r脉与翅痣宽等长(后者明显短于翅痣宽)；3)后足胫节内距长为基跗节6／7(后者为1／2)；4)产卵管鞘长为后足胫节1／2(后者为1／3)；5)前后单眼间距与单眼直径等长(后者短于单眼直径)。采自湖北房县。本文附中国小腹茧蜂属分种检索表。模式标本均保存在浙江大学植保系寄生蜂标本室。

TWO NEW SPECIES OF MICROGASTER LATREILLE FROM CHINA (HYMENOPTERA, BRACONIDAE, MICROGASTRINAE)

The present paper describes two new species of Microgaster Latreille, 1804, recorded in China. viz: M. breviterebrae(♀) and M.Longicalcar(♀).M.Breviterebrae is described from heilongjiang,Jilin and Liaoning Provinces and is closely related to M. grandis, but differs from the latter in the combination of the following features: 1) fore wing with a dark spot beneath stigma; 2) penultimate joint of antenna 1.2 times as long as wide; 3) vertex smooth; 4) tergite 3 polished; 5 )hind femur black. M. longicalcar is described from Hubei Province and is closely related to M. breviterebrae, but differs from the latter in the combination of the following features: 1) 1-SR of fore wing almost 0.5 times as long as 1-M; 2) r of fore wing as long as the width of stigma; 3) inner spur of hind tibia 0.86 times as long as basitarsus; 4) the hairy part of ovipositor sheath 0.5 times as long as hind tibia; 5) OD as long as APOL. A key to Chinese species of Microgaster Latreille is provided.The type specimens are deposited in Zhejiang University, Hangzhou, China.