长尾小蜂属二新种(膜翅目:长尾小蜂科)

记述采自新疆皮山和甘肃文县的长尾小蜂属Torymus Dalman 2新种：宽翅长尾小蜂Torymus latialatus,sp．nov．和甘肃长尾小蜂Torymus gansuensis,sp．nov．。模式标本保存在浙江大学应用昆虫学研究所。     

中国长尾小蜂属(膜翅目,长尾小蜂科)一新纪录种

记述长尾小蜂科Torymidae长尾小蜂属Torymus中国1新纪录种,玫瑰瘿长尾小蜂Torymus bedeguaris(L.).该种是从苦水玫瑰的重要害虫玫瑰犁瘿蜂Diplolepid rosae(L.)的虫瘿中育出.提供了形态描述、寄主、分布及形态特征图.研究标本保存在中国科学院动物研究所动物标本馆及兰州市农业科技研究推广中心标本室.     

中国长尾小蜂属(膜翅目,长尾小蜂科)分类研究

研究了中国长尾小蜂属Torymus Dalman,记述3个中国新纪录种,提供了形态特征图,编制了中国长尾小蜂属分种检索表.研究标本保存在中国科学院动物研究所动物标本馆.     

中国螳小蜂属一新种及二新纪录种(膜翅目,长尾小蜂科)

研究了长尾小蜂科长尾小蜂亚科螳小蜂属Podagrion Spinola,1811,描述1新种短脉螳小蜂Podagrion breviveirus sp.nov．及2新纪录种拟螳小蜂Podagrion isos Grissell ＆ Goodpasture和喀拉拉螳小蜂Podagrion keralensis Narendran。新种短脉螳小蜂Podagrion breviveinus sp.nov．与其它两种的主要区别是：触角棒节不膨大,棒节长度明显短于B．F7长度之和;并胸腹节2条亚中脊之间的夹角为锐角;前翅缘脉为后缘脉的8倍;产卵鞘长度约为体长的1．5倍。模式标本保存于中国科学院动物研究所动物标本馆。     

四突跳小蜂亚科三新记录属及三新种记述(膜翅目:跳小蜂科)

记述采自辽宁、黑龙江和新疆的3个跳小蜂属：卡丽跳小蜂属Charitopus Forster、裂脖跳小蜂属Rhopus Forster和塞克跳小蜂属Sakencyrtus Hayat,均为我国首次记录。共记述4个种,其中卡丽跳小蜂属有1中国新记录种,即暗色卡丽跳小蜂Charitopus obscurus(Erdoes);裂脖跳小蜂属2新种,即短翅裂脖跳小蜂Rhopus brachypterous Xu．sp．nov．和黄色裂脖跳小蜂Rhopus flavus Xu,sp．nov．;塞克跳小蜂属1新种,即长尾塞克跳小蜂Sakencyrtus longicaudus Xu．sp．nov．。     

艾菲跳小蜂族三中国新记录属三新种(膜翅目:跳小蜂科)

报道采自辽宁沈阳、阜新和大连的3种跳小蜂,即黑角赛巴跳小蜂Ceballosia nigricornis Xu,sp．nov．、短翅抑蚧跳小蜂Echthroplexiella brachyptera Xu,sp．nov．和黄角秀柯跳小蜂Pseudococcobius flavicornis Xu,sp．nov．,对新种进行了详细描述。本文也是赛巴跳小蜂属Ceballosia Mercet、抑蚧跳小蜂属Echthroplexiella Mercet和秀柯跳小蜂属Pseudococcobius Timberlake在我国分布的首次记录。     

浙江蚜小蜂属一新种：膜翅目：蚜小蜂科

本文报导分布于浙江的蚜小蜂属一新种:桃粉蚜蚜小蜂Aphelinus hyalopteraphidis sp.nov.并详细描述了其分类特征及与近似种的区别。     

中国寄生于林木食叶害虫的短角平腹小蜂属(膜翅目,旋小蜂科)四新种记述

记述了短角平腹小蜂属Mesocomys Cameron(膜翅目,旋小蜂科)4新种:枯叶蛾短角平腹小蜂M.trabalae sp.nov.,短柄短角平腹小蜂M.breviscapis sp.nov.,落叶松短角平腹小蜂M.superansi sp.nov.,中华短角平腹小蜂M.sinensis sp.nov..它们均寄牛于我国重要的食叶害虫的卵.是重要的灭敌昆虫.同时,编制了我国矩角平腹小蜂属种的枪索表.     

中国花翅跳小蜂族二新种(膜翅目,跳小蜂科)

记述采自辽宁沈阳和大连的跳小蜂2新种,即丽柄虱克跳小蜂Aschitus scapus Xu,sp.nov.和短颊赛诺跳小蜂Xenoencyrtus brevimalarus Xu,sp.nov..虱克跳小蜂属Aschitus Mercet和赛诺跳小蜂属Xenoencyrtus Riek为我国新纪录属.     

桑天牛长尾啮小蜂的初步研究

桑天牛长尾啮小蜂是桑天牛的卵寄生蜂,在江苏省寄生率为6.25～61.85％。本文详细叙述了桑天牛长尾啮小蜂的形态特征,与天牛卵长尾啮小蜂形态上的主要区别,以及它的生活史、生活习性等。     

Selection with two alleles and complete dominance

For a plant selection model with frequency-independent viabilities, fertilities and selfing rates, it is shown that apart from global fixation, for certain parameter combinations a protected polymorphism and facultative fixation (either allele may become fixed according to initial frequencies) may both occur. Facultative fixation requires different selling rates for the dominant and recessive type. Protection of the polymorphism requires resource allocation for male and female function. In this connection the problem of purely genetically caused population extinction is discussed.
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment.     

杆状病毒出芽病毒粒子膜融合蛋白的研究进展

杆状病毒是一类感染节肢动物的病原微生物,其基因组为双链环状DNA,大小为80～180kb.     

Inception of the Modern Public Health System in China and Perspectives for Effective Control of Emerging Infectious Diseases: In Commemoration of the 140th Anniversary of the Birth of the Plague Fighter Dr. Wu Lien-Teh

In this article, we systematically review Dr. Wu Lien-Teh's academic achievements and outstanding contributions in the prevention and control of the plague epidemic in northeast China and introduce the development of the earliest public health epidemic prevention system in China in order to commemorate the 140th anniversary of Dr. Wu Lien-Teh's birth. We hope that this article will provide insights into the effective prevention and control of emerging infectious diseases as well as the current worldwide pandemic of COVID-19, facilitating the improvement and development of public health systems in China and around the globe.