侧沟茧蜂属一新种记述(膜翅目:茧蜂科:小腹茧蜂亚科)

A NEW SPECIES OF MICROPLITIS FOERSTER (HYMENOPTERA: BRACONIDAE: MICROGASTRINAE) FROM FUJIAN, CHINA

本文记述采自福建福州的侧沟茧蜂属ＭｉｃｒｏｐｌｉｔｉｓＦｏｅｒｓｔｅｒ１新种：暗翅侧沟茧蜂Ｍｉｃｒｏｐｌｉｔｉｓｏｂｓｃｕｒｉｐｅｎｎａｔｕｓ，ｓｐ．ｎｏｖ．。模式标本保存在浙江大学植物保护系昆虫标本室。

Microplitis obscuripennatus Xu et He, sp. nov. (Figs. 1,2) Female head behind eyes not broading in dorsal view and 2.2 times as wide as long. Face rugose punctate in middle, rugose laterally. Antennal sockets and frons rugulose, vertex, temples and occiput rugose punctate. Ocelli large, OD∶APOL∶POL∶OOL = 3∶2∶7∶8(×35). Antennae as long as body, penultimate joint of antennae 3 times as long as wide. Mesosoma distinctly wider than head, ratio of its length, width and height is 80∶52∶55(×35). Mesoscutum rugose punctate, outer margins of lateral lobes more coarsely punctate, notauli well developed, represented by coarsely crenulate furrows meeting posteriorly to form wide and deep crenulate field devided by short medial longitudinal carina. Dorsal scutellum coarsely rugose, bordered laterally by crenulate furrow forming distinct carinate margin. Stigma 2.7 times as long as wide, 1 R 1 almost as long as stigma, r∶width of stigma∶2 ST=9∶13∶11(×35), areolet quadrangle, 1 cu 1 0.33 times as long as 2 cu 1. T1 parallel, 3.1 times as long as the greatest width, densely rugose, apical 1/6 smooth, apical margin with small smooth swelling. T2 as long as T3, smooth. Head black; Antennae blackish; Palps dark brown; Mesosoma black; Coxa black; fore leg dark reddish yellow but basal 1/3 of femur blackish, mid leg black but from tibia to tarsus with some light area, hind leg black; Metasoma black, laterotergites of T1-T3 yellowish white; Wings blackish infuscate, stigma evenly blackish. This species is closely related to Microplitis cebes Nixon, but differs from the latter as follows: Penultimate joint of antennae 3 times as long as wide; Notauli well developed, wide and deep considerably, represented by coarsely crenulate furrows meeting posteriorly to form wide and deep crenulate field devided by short medial longitudinal carina; Dorsal scutellum bordered laterally by crenulate furrows forming distinct carinated margin; Wings blackish infuscate, stigma evenly blackish; T1 3.1 times as long as wide; Hind tibia black. Length: ♀ 5.0 mm～5.6 mm. Holotype: ♀ Fuzhou (26. 2°N., 119.5°E.), Fujian Province, 22-Ⅲ-1993, by Liu Changming, No. 967197. Paratypes: 4♀ ♀, same data as holotype, Nos. 967194-967196, 967198; 2♀♀, same data as holotype but 10-Ⅴ-1993, Nos. 967277, 967296, All the type specimens are deposited in Zhejiang University.