陕西的金鹬虻属五新种：双翅目：鹬虻科

双翅目的鹬虻科(Rhagionidae)成虫和幼虫均为捕食性的昆虫,金鹬虻属(Chrysopilus)的种类有些捕食蝗卵、象虫幼虫等而甚有益,国外曾用于生物防治。金鹬虻属为本科的一个大属,已知270余种。我国除台湾省有9种外,仅东北地区记录过一种,最近我们研究了云南和广西的标本又增加了11新种;本文记述陕西的5个新种,有的也分布于甘肃、宁夏和山西等地。新种的模式标本保存在我校昆虫标本室,三斑金鹬虻的一对副模分藏在西北农业大学昆虫博物馆。周氏金鹬虻则以周尧教授的姓氏来命名,感谢他对后辈的热情栽培,对他表示崇高的敬意。     

内蒙古金鹬虻—新种(双翅目:鹬虻科)

金鹬虻属Chrysopilus Macquart是双翅目鹬虻科(Diptera:Rhagionidae)中的大属,已知约270种,广泛分布于各大动物地理区。我国曾记载台湾省有9种,东北地区有日本的共同种C.dives Loew,近年我们陆续记述了20多个新种。内蒙古的金鹬虹属则为初次报道,本文根据我们1978年采集的标本描记一新种和一内蒙古新记录种,模式标本保存在北京农业大学昆虫标本室。     

云南的金鹬虻属五新种（双翅目：鹬虻科）

本文报道了在云南发现的金鹬虻属五新种,并与已发表种作了必要的比较。     

广西金鹬虻属五新种(双翅目:鹬虻科)

双翅目短角亚目(Brachycera)的鹬虻科(Rhagionidae或Leptidae)多中小型种,足细长,喜潮湿环境或在水边,故以鹬(音玉,长足水鸟)为名,拉丁学名均源于希腊词rhagio(一种蜘蛛)、lept(细长)也指足的特点。鹬虻科为捕食性昆虫,多以其他双翅目昆虫为食,极少数有吸血的习性;幼虫生活在树皮下、朽木中、土壤内、粪肥里或水中,捕食     

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-     

贵州茂兰鹬虻科一新种：（双翅目：短角亚目）

双翅目短角亚目(Brachycera)的鹬虻科(Rhagionidae)多为中小型昆虫。足细长,翅常具斑纹,腹部较长;生活在水域附近,喜在阴湿的环境、甚至小雨中活动。成虫和幼虫多为捕食性,有些种类在国际上已用作生物防治。鹬虻科世界已知约600种,我国过去只有外国学者记载过10种,其中9种在台湾,另1种为记载于东北的日本种。近年来,我们开展此科分类研究,已陆续报道了浙江、湖北、广西、云南、西藏、内蒙及     

新疆维吾尔自治区虻科(双翅目)记略

作者根据近年来收集到的标本,结合文献资料,记述了新疆维吾尔自治区虻科共50种,其中斑虻属5种;瘤虻属18种,包括1新种;黄虻属6种;虻属15种;麻虻属6种,包括1新种。模式标本均保存于中国科学院动物研究所。     

“翘嘴娘子”——反嘴鹬

反嘴鹬与黑翅长脚鹬是反嘴鹬科的亲戚——反嘴鹬科广泛分布于温、热带淡水水域,有3～4属7～11种,在中国只有黑翅长脚鹬和反嘴鹬两种。虽然它俩都是一身黑白熊猫装,搭配得错落有致,但是黑翅长脚鹬隶属长脚鹬属,以其高跷红腿夺     

四川平须舞虻属Platypalpus三新种（双翅目：舞虻科）

平须舞虻属Platypalpus Macquart是舞虻科中最大的属之一,已知550余种分布世界各地.四川以前已知8种.本文记述四川平须舞虻属3新种:短芒平须舞虻Platypalpus breviarista sp.nov.,微距平须舞虻Platypalpus minor sp.nov.和亚丁平须舞虻Platypalpus yadinganus sp.nov,均属于长角平须舞虻种团Platypalpus longicornis species group,并编制了四川平须舞虻属分种检索表.     

中国鞍腹水虻亚科二新纪录属种记述(双翅目,水虻科)

报告了水虻科Stratiomyidae鞍腹水虻亚科Clitellarinae中国2新纪录属及种,即毛面水虻属Campeprosopa Macquart及长刺毛面水虻Campeprosopa longispina(Brunetti),和优多水虻属Eudmeta Wiedmann及王冠优多水虻Eudmetadia dematipennis Brunetti,其中王冠优多水虻的雄性描述系首次报道。并补充描述了王冠优多水虻Eudmeta diadematipennis形态特征及雄性外生殖器图。研究标本保存在贵州大学昆虫研究所。     

Recent advances in the study of Kaposi's sarcoma-associated herpesvirus replication and pathogenesis

It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis.     

The structure, reproduction and taxonomy of Vidalia and Osmundaria (Rhodophyta, Rhodomelaceae)

Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.     

New or rare chromosome counts in Artemisia L. (Asteraceae, Anthemideae) and related genera from Kazakhstan

Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.     

肝癌中HBV和HCV基因和抗原的分布及意义

采用原位分子杂交方法检测HCV RNA及HBV X基因;采用免疫组织化学方法研究HCV核心抗原,非结构区C33c抗原及HBxAg在肝细胞肝癌中的定位及分布.结果表明(1)HCV RNA、HBV X基因在肝细胞肝癌组织检出率分别为40%(55/136)和82%(112/136).HCV RNA定位于癌细胞的胞浆内,阳性细胞呈散在、灶状及弥漫分布三种形式;HBV X基因在肝癌细胞中的分布呈胞浆型、核型及核浆型,阳性细胞也呈上述三种分布形式;(2)HCV C33c抗原、核心抗原在肝细胞肝癌中的阳性率为81%(133/164)及86%(141/164).C33c抗原定位于癌细胞及肝细胞的胞浆内;核心抗原既定位于癌细胞核中,又可定位于胞浆中.C33c抗原阳性细胞以灶状分布为主;而核心抗原阳性细     

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.