中国细蜂族一新属一新种(膜翅目:细蜂科)

细蜂科Serphidae的细蜂族Serphini主要特征为:盾纵沟缺或不明显仅由一浅洼痕显出;腹部通常具柄(除无翅细蜂属Paracodrus);上颚常具1齿(中沟细蜂属Parthenocodrus具2齿);后胸侧板前方的无刻皱区通常小于侧板的0.35倍;前翅长约为宽的3.0倍,翅有时退化为短翅型或缺如;第一盘室和第二盘室愈合,但肿额细蜂属Codrus有时例外;并胸腹节背表面中等长至长。该族已记载有7个属,我国已知有5个属,但有1属没有种的报道。据记载大多种类寄生于甲虫幼虫,特别是隐翅虫科Staphilinidae、步甲科Carabidae和叩甲科Elateridae;还有1种曾从蜈蚣Lithobius中养出。     

Species diversity of Ichneurnonidae and Serphidae (Hymenoptera) in an English suburban garden

In the two-year period, 1972–73, 6445 Ichneumonidae of 455 species were caught in a Malaise trap operated in a suburban garden in Leicester, England. An additional 74 species were trapped in 1974. The collection includes a number of species new to the British list. The flight season of ichneumonids extended from March to November or December, with peak abundance and diversity in August. Size of trap samples fluctuated erratically, depending on air temperature. No species was particularly common and many were rare, 141 being taken once only in the two-year period. The commoner species were present throughout the season, supporting the suggestion that ichneumonids are niche-specific rather than host-specific. Parasites of aphidophagous Neuroptera and Syrphidae, of spiders, of micro-Lepidoptera, and of Diptera found in decaying plant material were especially abundant, as is characteristic of the British fauna as a whole. Adult ichneumonids are mobile, and it is assumed that the Malaise trap was sampling an area far larger than the garden in which it was sited, although suburban gardens are a particularly favourable habitat for ichneumonids. Twenty-two species of Serphidae were captured in the Malaise trap during 1972–74, five of them new to Britain.