小腹茧蜂属二新种记述(膜翅目∶茧蜂科∶小腹茧蜂亚科)

Tow new species of the genus Microgaster Latreille (Hymenoptera:Braconidae:Microgastrinae) from China

本文记述采自山东、四川和浙江省的小腹茧蜂属 Microgaster L atreille 2新种 :盘脉小腹茧蜂 Microgasterdiscoidus,sp.nov.和红褐小腹茧蜂 Microgaster ferrugineus,sp.nov.。模式标本保存在浙江大学植物保护系昆虫标本室。

This paper deals with tow new species of the genus Microgaster Latreille from China: Microgaster discoidus, sp. nov. and Microgaster ferrugineus, sp. nov.. All the type specimens are deposited in Zhejiang University, China. 1 Microgaster discoidus Xu et He, sp. nov.(Figs. 1～5) This new species somewhat resembles M.consors Nixon, but differs from the latter in the combination of the following features: 1) Penultimate joint of antenna 2 times as long as broad; 2) Hypopygium evenly sclerotized, not tightly folded along the middle line and without trace of lateral creases; 3) Third claw with a single small spine; 4) Ovipositor sheath 1/2 the length of hind tibia. Holotype ♀, Xichang (27.9° N, 102.3° E), Sichuan province, China, 22.Ⅶ.1979, coll. He Rongrong, No. 816322. 2 Microgaster ferrugineus Xu et He, sp. nov. (Figs. 1-4) This species is closely related to Microgaster ravus You & Zhou, but differs from the latter in the combination of the following features: 1) Body reddish brown; 2) POL as long as OOL∶3) 1-C U1 shorter than 2-C U1 ∶4) Tergite 3 longer than Tergite 2, and with weak rugosity on anterior half part. Holotype ♂, Meganshan (30.6° N, 119.8° E), Zhejiang Province, China 12. Ⅵ. 1992, coll. Lin Wei, No. 923052; Paratype:1♂, Taian (36.3° N, 117.2° E), Shandong Province, China, 31.Ⅶ. 1995, coll. He Junhua, No. 955332.