中国三节茧蜂属Acampsis Wesmale记述(膜翅目:茧蜂科:屏腹茧蜂亚科)

THE GENUS ACAMPSIS WESM AEL FROM CHINA (HYMENOPTERA: BRACONIDAE: SIGALPHINAE)

三节茧蜂属Acampsis Wesmael是屏腹茧蜂亚科中的1个小属,全世界仅知1种。本文新添在我国发现的2个新种:中华三节茧蜂A.chinensis sp.nov.(陕西)和湖南三节茧蜂A.hunanensis sp.nov.(湖南)。这是本属在我国的首次发现,也是在东洋区的首次报道。

Acampsis Wesmael is one of the smallest genera of Braconidae. It contains only the type species, A. alternipes (Nees) since it was erected more than 150 years ago. The descriptions and figures of this type species given by different authors at differnt times are discrepant in some aspects. Therefore, we treat van Achterberg/s figures of A. alternipes as a standard for comparison. In this paper two new species are added from China. They are fully described and illustrated, and may be separated by the following key.1. Nervellus of hind wing inclivous; length of ovipositor sheath as long as length of 3rd tergite; antenna 35-36 segments; length of 3rd abscissa of radius 1.3 times 2nd abscissa; length of1st tergite 1.3 times its apical width. Length of body 8-9 mm. Cocoon white … A. alternipes (Nees)Nervellus of hind wing vertical; length of ovipositor sheath 0.6-0.7 times length of 3rd tergite; antenna 39 or 47 segments; length of 3rd abscissa of radius as long as 2nd abscissa 22. Occipital carina complete; antenna 47 segments; length of 1st tergite 1.3 times its apical width, its two longitudially medial carinae convergent towards apex; clypeus, palpi, tegulae, coxae, trochanter and hind femur black. Length of body 9 mm. Cocoon brownish … A. chinensis sp. nov.Occipital carina absent medio-dorsally for a long distance; antenna 39 segments; length of 1st tergite as long as its apical width, and its two longitudially medial carinae divergent towards apex; clypeus reddish brown, palpi and tegulae yellow, coxae, trochanter and most part of hind femur reddish yellow. Length of body 5.8 mm ……… A. hunanensis sp. nov.1. Acampsis chinensis sp. nov. (Figs. 1-3)Holotytpe: (?) , Mei Xian (34.2 °?N, 107.7° ?E), Shaanxi Prov., 1974, Chen You-guang, No. 740201. Allotype: (?) , the same data as holotype. Host: a geometrid larva collected from an apple tree.2. Acampsis hunanensis sp. nov. (Figs. 4-5)Holotype: (?) , Liuyang (28.7 °?N, 113.6 °?E), Hunan Prov., 19-Ⅳ-1986, Tong Xin-wang, No. 864621.The type specimens are kept in the collection of the Biological Control Laboratory, Zhejiang Agricultral University, Hangzhou.