取食落叶松的槌缘叶蜂属一新种(膜翅目,叶蜂科)

记述采自中国西北地区的突瓣叶蜂亚科1新种:西北槌缘叶蜂Pristiphora xibei sp.nov.,编制了古北区危害落叶松属植物的槌缘叶蜂属种类分种检索表。在宁夏地区,新种危害华北落叶松Larix gmelinii var.principisrupprechtii(Mayr.)Pilger,并与红环槌缘叶蜂(落叶松红腹叶蜂)Pristiphora erichsonii(Hartig,1837)混合发生,但种群数量显著小于后者。

A NEW SPECIES OF PRISTIPHORA (HYMENOPTERA,TENTHREDINIDAE) FEEDING ON LARIX FROM CHINA

A new species of Pristiphora of Nematinae feeding on Larix gmelinii var. principisrupprechtii (Mayr.) Pilger collected from Mt. Liupan, Ningxia is described: Pristiphora xibei sp. nov. A key to Palaearctic species of Pristiphora feeding on Larix spp. is provided. Type specimens of the new species are deposited in the Insect Collection of Central South University of Forestry and Technology, Changsha, Hunan, China. Pristiphora xibei sp. nov. (Figs 1-13) Body length 6.5-7.0 mm. This species is closed to P. bufo (Brischke, 1883) but differs from it in the dorsal side of head, thorax and abdomen mainly black, mesopleuron and at least basal 1/3 of each sternite black; veins and stigma of forewing black brown; lamnium of lancet distinctly longer than radix; first annular suture hardly curved, apical 4 annular sutures distinctly curved; basal serrulae strongly protruding with apex round; spines of ctenidium short and stout, about 4-5× as long as broad. Holotype ♀, Heshangpu Forest Plant (36°02′N, 106°16′E; alt. 2 354 m), Mt. Liupan, Guyuan, Ningxia Province, China, (feeding on) Larix gmelinii var. principisrupprechtii (Mayr.) Pilger, 29 July 2011 (eclosion time of adults), coll. XIA Gu-Cheng. Paratypes: 14♀♀, same data as holotype; 2♀♀, forest plant of Mt. Liupan, Ningxia, 20 Apr. 2011 (eclosion time of adults), coll. XIA Gu-Cheng.