Taxonomic study on two Chinese species of the genus Cerynia (Hemiptera,Fulgoromorpha, Flatidae)

Male genitalia of the species Cerynia lineola Melichar is described and illustrated for the first time from China. Colour polymorphism in a planthopper species Cerynia maria (White, 1846) is investigated based on some specimens from China, and a map showing the geographic distribution of this species is also provided. The examined specimens are deposited in the Institute of Entomology, Guizhou University, Guiyang, China (GUGC).     

中国蛾蜡蝉科一新记录属并记一新种(半翅目:蛾蜡蝉科:涩蛾蜡蝉族)

报道了中国新记录属长蛾蜡蝉属Gomeda Distant,1906,该属隶属于蛾蜡蝉科Flatidae、涩蛾蜡蝉族Selizini,综述了该属的分类研究历史,并记述1新种——素长蛾蜡蝉Gomeda unicolorata,sp.nov.,提供了新种的形态和雌性外生殖器特征图,编制了本属分种检索表。新种模式标本保存在中国科学院动物研究所。     

Biological and molecular evidence for the transmission of aster yellows phytoplasma to French marigold (Tagetes patula) by the flatid planthopper Metcalfa pruinosa

Aster yellows (AY) phytoplasmas (Candidatus Phytoplasma asteris) are associated with a number of plant diseases throughout the world. Several insect vectors are responsible for spreading AY diseases resulting in wide distribution and low host specificity. Because the role of sucking insects as vectors of phytoplasmas is widely documented, and the citrus flatid planthopper Metcalfa pruinosa is a phloem feeder, it has been incriminated as a possible vector of phytoplasmas. However, its ability to transfer phytoplasma has not been confirmed. The present work shows that M. pruinosa (Hemiptera: Flatidae), a polyphagous planthopper, is able to vector Ca. P. asteris to French marigold (Tagetes patula). Transmission experiments were conducted in 2017 and 2018 in central Hungary by two approaches: (a) AY-infected M. pruinosa were collected from an area with severe incidence of the disease on T. patula and caged on test plants for an inoculation-access period of 2 weeks, and (b) presumably phytoplasma-free insects were collected from apparently healthy grapevines (Vitis vinifera L.) and fed on AY-infected T. patula plants for 2 weeks prior to being caged on test plants. AY disease symptoms developed on 4 out of 10 and 10 out of 15 test plants, respectively. All phytoplasma-positive marigold and M. pruinosa samples showed identical RFLP patterns and shared 100% 16S rDNA sequence identity with each other and with the aster yellows phytoplasma strain AJ33 (GenBank accession number MK992774). These results indicated that the phytoplasma belonged to the phytoplasma subgroup 16SrI-B Ca. P. asteris. Therefore, the work presented here provides experimental evidence that M. pruinosa is a vector of a 16SrI-B subgroup phytoplasma to T. patula.     

Planthoppers of Delaware (Hemiptera, Fulgoroidea), excluding Delphacidae, with species Incidence from adjacent States

The number of species of planthoppers (excluding Delphacidae) known from Delaware is updated from 7 (in 4 families) to 62 species (in 9 families). Specimen abundance is tallied by county and seasonally by two week intervals. The Chao1 abundance estimator suggests that the true fauna may be 74 species, although species incidence tallied from adjacent states (MD, NJ, PA and DC) suggests that a total fauna of approximately 100 species may be possible. An artificial key is presented to genus and select species with photos of most included taxa.     

Host range testing of the nearctic beneficial parasitoid <Emphasis Type="Italic">Neodryinus typhlocybae</Emphasis>

Neodryinus typhlocybae (Ashmead) (Hymenoptera: Dryinidae) is a natural enemy of the planthopper Metcalfa pruinosa (Say) (Hemiptera: Flatidae), introduced from North America into Europe and regionally established as a pest species. Prior to possible utilization of the parasitoid as a biocontrol agent in Austria, its potential negative impacts on eight native plant- and leaf-hopper species were examined in the laboratory. Non-target species were selected according to the following criteria (a) occurrence in Austria, (b) close phylogenetic relationship with M. pruinosa, (c) larvae free-living and surface-dwelling, (d) phenology, (e) larval size, (f) ecological similarity with M. pruinosa and (g) availability of sufficient numbers of individuals. The Auchenorrhyncha species Issus coleoptratus (Fabricius), Chloriona smaragdula (St?l), Conomelus anceps (Germar), Alebra wahlbergi (Boheman), Empoasca sp., Idiocerus stigmaticalis (Lewis), Macrosteles septemnotatus (Fallén) and Japananus hyalinus (Osborn) were chosen for testing. Larvae from both the target and the non-target species were offered separately to N. typhlocybae females in no-choice laboratory tests and all attacks, instances of host feeding and parasitizations were recorded. No non-target species was attacked, fed upon or parasitized by N. typhlocybae, whereas M. pruinosa was attacked frequently. This study supports the assumption that the host range of N. typhlocybae is restricted to Flatidae, of which only the introduced species occurs in Austria. Direct negative effects on other Auchenorryncha species in Austria are therefore unlikely to occur.

中国碧蛾蜡蝉属的分类研究(半翅目:蛾蜡蝉科)

综述了碧蛾蜡蝉属Geisha Kirkaldy的分类研究历史,研究了中国碧蛾蜡蝉属种类,同意莎碧蛾蜡蝉G．sauteri Jacobi是碧蛾蜡蝉G．distinctissima（Walker）的异名。记述了中国碧蛾蜡蝉属4种,包括2新种——二叉碧蛾蜡蝉G．bifurcata,sp．nov．,秦岭碧蛾蜡蝉G．qinlingensis,sp．nov．。提供了分种检索表。模式标本保存在西北农林科技大学昆虫博物馆。     

中国埃蛾蜡蝉属分类研究（同翅目：蛾蜡蝉科）

综述了埃蛾蜡蝉属 Exoma Melichar的分类研究历史,研究了中国埃蛾蜡蝉种类,同意Leocerus属是埃蛾蜡蝉属Exoma的异名,将其归入埃蛾蜡蝉属并记述了1个新种——基斑埃蛾蜡蝉 Exoma basimacula,sp．nov．。提供了分种检索表。模式标本保存在西北农林科技大学昆虫博物馆。     

Madagascar Flatidae (Hemiptera,Fulgoromorpha): state-of-the-art and research challenges

The paper provides a historical review of the research on Flatidae in Madagascar and indicates future prospects. While the first two species of Madagascar Flatidae were described by Guérin-Méneville (1844), it was Signoret (1860) who made the first real attempt to enhance our knowledge of the Hemiptera fauna of Madagascar by describing several additional species. Over the following century and a half, several investigators have turned their attention to this group of insects, with the final number of species recorded for the island reaching 79. Despite this long history of research, it is evident that much still remains to be done. Detailed taxonomic research will allow the natural history of Madagascar and changes in the biological diversity of its endemic ecosystems to be better understood. This paper should be considered as an introduction to a complex study on the systematics and phylogeny of worldwide Flatidae planthoppers.     

中国彩蛾蜡蝉属分类研究(半翅目,蛾蜡蝉科)

综述了彩蛾蜡蝉属Cerynia St(a)l的分类研究历史,研究中国彩蛾蜡蝉属种类.记述中国彩蛾蜡蝉属4种,包括1新种--指突彩蛾蜡蝉C.digitula sp.nov..提供了分种检索表.新种模式标本保存在西北农林科技大学昆虫博物馆.     

中国缘蛾蜡蝉属分类与二新纪录种(半翅目,蛾蜡蝉科)

记述蛾蜡蝉科:Flatidae缘蛾蜡蝉属Salurnis Stal中国2新纪录种:海缘蛾蜡蝉S.hesita Medler,1992和埃缘蛾蜡蝉S.estora Miedler,1992,提供了形态及雄性外生殖器等特征图.制作了本属分布于中国的5个种的分种检索表.