贵州虻属五新种（双翅目：虻科）

本文记述采自贵州的虻属五新种:似类柯虻Tabanus cordigeroides sp.nov.、贵州虻T.guizhouensis sp.nov.、似杭州虻T.hongchowoides sp,nov.、伪青腹虻T.Pseudoliuiuentris sp.nov.和亚岷山虻T.subminshanensis sp. nov.,并分别进行了分类讨论。     

中国虻属种类检索表（双翅目：虻科）

虻科昆虫是重要吸血害虫,全世界约4230种,我国已知虻类达400多种。我国虻科共记载10个属,其中虻属Tabanus、斑虻属Chrysops、麻虻属Haematopota和瘤虻属Hybomitra的种类最多,占我国己知种的百分之九十以上。在以上4个属中,尤以虻属的种类最多,近200种。虻属的种类体态特征变异最大,在分类鉴定上有很大的困难。国外有的专家如Olsufjev、Ta-     

中国虻属二新种：双翅目：虻科

本文报道了虻属二新种:晨螫虻 Tahanus matutinimordicus sp.nov.;似冲绳虻 T.okinawanoides sp.nov.,作者对新种的形态特征进行了详细描述,并与近似种作了比较。     

青海省虻科一新种及二种雄虻记述(双翅目:虻科)

本文记述青海省瘤虻属一新种,以及过去未记载的Haemetopota ustulata(Kr(?)ber),Tabanus grandicaudus Xu,的雄虫。模式标本保存于中国科学院动物研究所。 1.无带瘤虻Hybomitra(Tibetomyia)afasciata新种(图1)     

闽北虻属一新种记述

1992年在闽北邵武市开展吸血虻类调查,于武夷山自然保护区西侧二都林场采获一批近似黑额虻标本,经鉴定系虻属新种,定名武夷山虻Tabanus wugishaneisis。     

福州虻属一新种(双翅目：虻科)

福州虻属一新种（双翅目：虻科）徐保海（福建省寄生虫病研究所福州３５０００１）许荣满（微生物流行病研究所北京１０００７１）本文记述采自福州郊区虹属一新种,正模保存于微生物流行病研究所。福州这Ｔａｂａｎ。。Ｉｎ。ｈｏｕｅｎａｉｓ新种（图ｌ—５）雌虫体长１...     

中国突颊剑虻属一新种（双翅目：剑虻科：剑虻亚科：塞洛提剑虻族）

突颊剑虻属Bugulaverpa首次在中国被发现,自此分布于旧世界的塞洛提剑虻族Cyclotelini的3个属(环剑虻属Procyclotelus,沙剑虻属Ammothereva和突颊剑虻属Bugulaverpa)均在中国被记录。本文记录中国突颊剑虻属1新种:海南突颊剑虻Bugulaverpa hainanensis sp. nov.。该种额为亮黑色,仅在侧缘各有1个半圆形的灰白粉斑。单眼瘤被灰白粉。中足胫节褐黄色。雌虫生殖叉前缘有2个明显的突起。     

中国的麻虻属(双翅目:虻科)

中国的麻虻属 Haematopota经记录清理,国内保存标本的复核,共计52种。其中包括二新种,即似中华麻虻H.sineroides sp.nov.和骚扰麻虻H.vexativa sp.nov.。认为H.pungcnsis 是H.atrata 的误定,H.annandalei是H.personata的误定。对雌性有记载的51种作了分组研究,共分11组,即白条麻虻组H.atrata group 4种;繸腿麻虻组H.cilipes group 1种;毛股麻虻组H.pilosifemura group 5种;怒江麻虻组H.lukiangensis group 1种;条带麻虻组H.lineola group 3种;沥青麻虻组H.picea group 5种;黑角麻虻组H.nigriantenna group 9种;土耳其麻虻组H.rurkestanica group 3种;中华麻虻组H.sinensis group 3种;圆胛麻虻组H.irrorara group 6种;北京麻虻组H.pekingensis group 11种。并编制了分组分种检索表     

中国四川平舞虻亚属Planempis三新种(双翅目:舞虻科:舞虻属)

平舞虻亚属Planempis Frey,1953为舞虻属Empis一个中等大小的类群,全世界已知46种,仅局限分布于古北区和东洋区,我国已知8种.本文发现平舞虻亚属Planempis在我国四川有分布,记述3新种:黄足平舞虻Empis(Planempis)flavipedalis sp.nov.,黑足平舞虻Empis(P...     

中国星水虻属三新种(双翅目:水虻科)

@@ 本文记述中国星水虻属3新种,即双斑星水虻Actina bimaculata,sp.nov.,三斑星水虻A trimaculata,sp.nov.和单斑星水虻A unimaculata,sp.nov..模式标本保存在中国农业大学昆虫博物馆.     

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.