瘤角姬蜂属Pleolophus一新种记述：（膜翅目：姬蜂科：沟姬蜂亚科）

瘤角姬蜂属Pleolophus是1962年Townes所建立的属;世界已知20余种。主要特征是:有些种类雌性翅退化或比胸部短。唇基宽、微凸,端缘中央钝形、通常稍洼。上颚上端齿与下端齿约等长。前沟缘脊不明显或无。中胸背板分布较密刻点,腹板侧沟长至少为中胸侧极长之半。基间脊有或缺如。并胸腹节分脊不明显或无,气门圆形。腹部第2-3节背板光滑至粗糙;产卵管直,背瓣末端光滑。 本文记述北京市延庆县的一新种,模式标本保存在北京农业大学昆虫标本室。

A NEW SPECIES OF PLEOLOPHUS TOWNES FROM BEIJING (HYMENOPTERA: ICHNEUMONIDAE: GELINAE)

Pleolophus atrijuglans sp. nov. (Figs. 1-9)Female: Closely allied to P. indistinctus (Provancher, 1886), but different from the latter in the following characters: (1) face with dense small granules, wrinkles and hairs; (2) mesoscutum and areole, petiolar area of propodeum with dense microtubercle and hairs; (3) wing reaching only to spiracle of propodeum; (4) abdomen 2-4 tergites polished, without wrinkles; (5)ovipositor with about 10 round foveolae at tip laterally.Holotype , paratypes 3 , 5 June 1982, from Yanqing County, Beijing, China, collected by Luo Weide.Host: Cocoons of Atrijuglans hetaohei Yang. (Lepidoptera: Heliodinidae).All the type specimens are deposited in the Insect Collections of Beijing Agricultural U niversity.