Reproductive behaviour of mated and virgin females of a solitary sawflyDineura virididorsata

Sex ratios of the arrhenotokous sawflyDineura virididorsata Retz. (Hymenoptera: Tenthredinidae) are variable among populations in the field, but are biased in favour of females. We have concluded elsewhere that the sex ratios of this species cannot be satisfactorily explained by any general sex ratio model that is available. Here we present data on the different behavioural traits that are relevant to interpretation of the evolution of female-biased sex ratios under local mate competition. We report on oviposition behaviour, mating behaviour and the patterns of movement of ovipositing virgin and mated females. Our results show that adult emergence is synchronous and females will mate daily with different males (in the laboratory, at least). This would decrease the relatedness of offspring should it also take place in the field. In addition, ovipositing females (mated and virgin) leave their site of release in a relatively short time and deposit few eggs relative to their capabilities, so siblings are unlikely to be clumped. The time that virgins spend in deposition of an egg is not different from that spent by mated females, so there is no differential ‘investment’ in this regard. These behavioural observations agree with our previous conclusion that the preconditions of current sex ratio theories are not met byD. virididorsata.     

STUDIES ON THE TRIBE FENUSINI OF CHINA (HYMENOPTERA: TENTHREDINIDAE)

Abstract  The following new taxa from China are proposed in the Fenusini : Profenusa chrysichlorita sp. nov., Nefusa sinica sp. nov., Nefusa brevis sp. nov., Metallus sichuanensis sp. nov. , Metallus wangi sp. nov. , Metallus mai sp. nov., Nefusa sinica sp. nov. Nefusa bratis sp. nov., Metatlus sichuanensis sp. nov., Birmella discoidalisa sp. nov., Okutanius pekingensis sp. nov. All these genera except for Birmella with Fenusa pusilla (Lepel.), Fenella monilicornis Thomson and Profenusa hirashima Togashi are new records from China. New taxa are described and figured. Keys to genera and species of the tribe Fenusini from China are proposed.     

中脉叶蜂族系统分类研究(膜翅目:叶蜂科)

本文系统厘订了中国中脉叶蜂族叶蜂,记述了１个新记录属种和２个新种：斑角狭脉叶蜂Ｍｅｇａｄｉｎｅｕｒａ ｇｒａｎｄｉｓ Ａｎｄｒｅ中国新纪录属种,黑背樟叶蜂Ｍｏｒｉｃｅｌｌａ ｎｉｇｒｉｔａ ｓｐ．ｎｏｖ．新种,中华中脉叶蜂Ｍｅｓｏｎｅｕｒａ ｓｉｎｉｃａ ｓｐ．ｎｏｖ．新种。恢复樟叶蜂属Ｍｏｒｉｃｅｌｌａ Ｒｏｈｗｅｒ的有效属地位,该属与近缘的Ｍｅｓｏｎｅｕｒａ属在上颚、触角、复眼、淡膜区、爪、翅     

线距叶蜂属一新种记述（膜翅目：叶蜂科）

本文记述叶蜂科中国１新记录属：线距叶蜂属Ｂｅｌｄｏｎｅａ　Ｃａｍｅｒｏｎ,并描述１新种：光胸线距叶蜂Ｂｅｌｄｏｎｅａｉｍｐｕｎｃｔａｔａ,ｓｐ．ｎｏｖ．和１新记录种：Ｂｅｌｄｏｎｅａｌｕｂｅｎｓ（Ｋｏｎｏｗ）。新种的鉴别特征是：腹部背板具大形黄斑,中胸侧板无刻点,前翅端半部均匀烟褐色。模式标本存于中南林学院林学系昆虫标本室。     

中国元叶蜂属一新种(膜翅目:叶蜂科)

记述采自中国湖南的元叶蜂属1新种:潇湘元叶蜂Taxonus hunanensis Wei et Huang,sp.nov.。该新种隶属于aterritinus种团,并与Taxonus aterritinus Wei很相似,新种模式标本存于中南林业科技大学昆虫标本馆。     

中国方颜叶蜂属(膜翅目,叶蜂科)种团二新种

记述方颜叶蜂属Pachyprotasis pallidistigma种团2新种:周氏方颜叶蜂Pachyprotasis zhoui Wei et Zhong,sp. nov.和稻城方颜叶蜂Pachyprotasis daochengensis Wei et Zhong, sp. nov..新种模式标本保存在中南林业科技大学昆虫模式标本室.     

尖唇叶蜂属系统分类研究(膜翅目:叶蜂科)

尖唇叶蜂属Adamas Malaise是中国新记录属。本文记述1个中国新记录种：宽缘尖唇叶蜂Adamas jakowleffi(Konow,1897)和4个新种：黄尾尖唇叶蜂A.caudatus sp.nov.,平行尖唇叶蜂A.parallelus sp.nov.,徐氏尖唇叶蜂A.xuisp.nov.和吕氏尖唇叶蜂A.lui sp.nov.,给出了详细描述和形态特征图,并编制了分种检索表。详细讨论了尖唇叶蜂属的系统学地位,初步分析了6个已知种之间的关系,认为A.jakowleffi(Konow)和A.ermak Zhelochovtsev,A.caudatus和A.parallelus.A.xui和A.lui分别构成一对姊妹种关系。尖唇叶蜂属上颚不对称,左上颚具1个大型基齿,右上颚单齿,唇基缺口深,侧叶尖,前翅臀室具很短的倾斜横脉,前胸侧板腹侧接触面窄或无,后胸后背板中央甚狭,后足基跗节很短等,表明本属是平背叶蜂亚科成员,系统学地位介于Allantini族和Empriini族之间,并自成一族——尖唇叶蜂族Adamasini。     

金氏叶蜂属研究及一新种记述(膜翅目,叶蜂科,平背叶蜂亚科)

修订了膜翅目叶蜂科平背叶蜂亚科的金氏叶蜂属Jinia Wei,描述了分布于中国中部的1新种:黑斑金氏叶蜂Jinia nigromacula sp.nov,基于正模标本重新描述了黄褐金氏叶蜂Jinia fulvana Wei et Nie,1999.金氏叶蜂属是中国特有属,目前已发现3种.编制了金氏叶蜂属已知种分种检索表.新种模式标本分别保存于中南林学院昆虫标本室和中国科学院动物研究所.     

中国纵脊叶蜂属分类研究（膜翅目：叶蜂科）

厘订了中国纵脊叶蜂属Xenapatidea Malaise种类,并记述1个新种——方顶纵脊叶蜂Xenapatidea reticulata sp. nov.和1个中国新纪录种——红胸纵脊叶蜂 Xenapatidea rufoscutellata Koch, 1996。首次报道并描述了X. rufoscutellata Koch, 1996的雌性。编制了纵脊叶蜂属8个已知种分种检索表。新种模式标本保存于中南林业科技大学昆虫标本馆。     

中国钩瓣叶蜂属一新种(膜翅目,叶蜂科)

钩瓣叶蜂属隶属于叶蜂科,已知230余种,中国已经报道77种.记述中国钩瓣叶蜂属1新种:尖唇钩瓣叶蜂Macrophya acuminiclypeus sp.nov.,该种与女贞钩瓣叶蜂 M.ligustri Wei et Huang,1997近似,但唇基缺口深,侧角狭长,端部尖,头部额区和中胸侧板刻点粗密,中胸背板前叶中沟模糊,几乎消失,后足股节基部1/4黄白色,锯腹片22刃,中部锯刃具10～11个后位亚基齿等,差别明显,易于鉴别.正模♀,江西萍乡芦溪,2004-04-03,魏美才采;副模:1♀,湖南浏阳,1985-05-08,童新旺,1♀,福建武夷山,1 100 m,2004-05-20,周虎.新种模式标本保存于中南林业科技大学昆虫模式标本室.