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寄生落叶松红腹叶蜂的翠金小蜂属一新种(膜翅目,金小蜂科)
引用本文:杨忠岐,夏固成,曹亮明.寄生落叶松红腹叶蜂的翠金小蜂属一新种(膜翅目,金小蜂科)[J].动物分类学报,2012,37(3):596-601.
作者姓名:杨忠岐  夏固成  曹亮明
作者单位:1. 中国林业科学研究院森林生态环境与保护研究所,国家林业局森林保护学重点实验室 北京,100091
2. 固原市六盘山林业局 泾源 756401
摘    要:记述在宁夏六盘山林区发现的金小蜂科翠金小蜂属Tritneptis1新种,六盘山翠金小蜂T.liupanshanensis sp.nov.。新种群集外寄生于危害落叶松的重要害虫——落叶松红腹叶蜂Pristiphora erichsonü(Hartig)的预蛹和蛹上,是自然寄生这种食叶害虫的主要天敌,在越冬预蛹中的寄生率达26.8%,每头寄主出蜂为18~74头,雌雄性比为6.2:1.0,在自然控制这种害虫上发挥着重要作用,是一种可用于生物防治的优良天敌。描述了新种的形态学特征,列出了区分我国该属现知4个种的检索表,并记述了新种的生物学特性。

关 键 词:膜翅目  金小蜂科  翠金小蜂属  新种

A NEW SPECIES OF THE GENUS TRITNEPTIS GIRAULT (HYMENOPTERA, PTEROMALIDAE) PARASITIZING PRISTIPHORA ERICHSONII ( HYMENOPTERA, TENTHREDINIDAE)
YANG Zhong-Qi , XIA Gu-Cheng , CAO Liang-Ming.A NEW SPECIES OF THE GENUS TRITNEPTIS GIRAULT (HYMENOPTERA, PTEROMALIDAE) PARASITIZING PRISTIPHORA ERICHSONII ( HYMENOPTERA, TENTHREDINIDAE)[J].Acta Zootaxonomica Sinica,2012,37(3):596-601.
Authors:YANG Zhong-Qi  XIA Gu-Cheng  CAO Liang-Ming
Institution:1.Key Lab of Forest Protection of China State Forestry Administration,Research Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry,Beijing 100091,China 2.Liupanshan Forestry Bureau of Guyuan City,Jingyuan County,Ningxia 756401,China
Abstract:A new species of genus Tritneptis Girault 1908,T.liupanshanensis Yang,sp.nov.,belonging to Pteromalidae(Hymenoptera) is described from China.It is a gregarious ectoparasitoid in the prepupa and /or pupa of sawfly Pristiphora erichsonii(Hartig)(Hymenoptera,Tenthredinidae),a serious defoliator pest of larch trees in Northern China.T he new species is a dominating natural enemy on the pest with parasitism rate 26.8 % in the overwinter prepupae of the sawfly.From a single host 18-74 wasps of the parasitoid were reared out with female and male ratio 6.2:1.0.It played an important role in regulating its host population naturally in the larch forests(Larix principis-rupprechtii) of Liupan M ountains,and it has a potential as a biological control agent.T he characters of the new species are described.A key to four species of the genus known in China is provided.T he biology of the new species is briefly described too.T ype specimens are deposited in the Insect Collection of Chinese Academy of Forestry,Beijing,China.Tritneptis liupanshanensis sp.nov.(Figs 1-10) T he new species is similar to T.affinis(Nees,1834),but can be distinguished from the latter by the key below.From other 2 Chinese species T.macrocentri Liao,1987 and T.klugii(Ratzeburg,1844) it can be also separated by the key.Key to four Chinese species of Tritneptis Girault(female).1.Antennal insertion on the lower ocular line,2nd anellus short and as long as the 1st;parasitizing larva of Macrocentrus sp.(Braconidae) ……………………………………………………T.macrocentri Liao Antennal insertion below lower ocular line,2nd anellus subquadrateand distinctly longer than the 1st;parasitizing other hosts ………2 2.Forewing with marginal vein 1.75-2.00 times as long as stigma vein;metasoma with length 2.25-2.70 times its width,and width less than mesosoma;temples only about one quarter as long as eye length T.klugii(Ratzeburg) … ……………………………………………… Forewing with marginal vein at least 2.3 times as long as stigma vein;metasoma relatively short with length below 2.0 times its width,and width greater than mesosoma;temples more than half as long as eye length …………………………………………………………………3 3.Forewing with marginal vein 2.5-3.0 times as long as stigma vein;metasoma with length 1.1-1.4 times its width and only slightly longer than mesosoma;metasoma only reddish brown basally T.affinis(Nees) …… …………………………………………………… Forewing with marginal vein 2.3 times as long as stigma vein(Fig.9) ;metasoma with length 1.6 times its width,its length 1.1 times combined length of mesosoma plus head;whole metasoma dark reddish brown(Fig.10) ………T.liupanshanensis sp.nov.Holotype ♀,Liupanshan Forest Farm,Guyuan,Ningxia,collecting cocoons of sawfly Pristiphora erichsonii(Hartig) on 1 May 2010,wasp emerged on 15 June 2010,XIA Gu-Cheng and YANG Zhong-Qi.Paratypes:30♀♀,12♂♂,emerged 15 M ay 2009,LIANG Xing-Ru and SUN Pu;116♀♀,36♂♂,1 M ay 2010,collecting cocoons of its host,wasps emerged 11-30 M ay 2010,XIA Gu-Cheng and YANG Zhong-Qi;30♀♀,8♂♂,collecting cocoons of its host on 28 Apr.2011,wasps emerged on 10 M ay 2011,XIA Gu-Cheng and YANG Zhong-Qi.All paratypes were reared from the cocoons of Pristiphora erichsonii(Hartig),and the same forest as holotype.Etymology.T he new species name is derived from the locality of its finding,M t.Liupan Forest Farm,Ningxia,China.
Keywords:Hymenoptera  Pteromalidae  Tritneptis  new species  
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