中国铲头叶蝉亚科二新记录种(半翅目:叶蝉科)

记述中国铲头叶蝉亚科新记录种异突铲头叶蝉Hecalus gressitti(Linnavuori)和三斑铲头叶蝉H.tripunctatus(Matsumura),检视标本保存于贵州大学昆虫研究所(GUGC).     

Notes on the Amazonian genus Hyogonia China (Hemiptera: Cicadellidae: Proconiini) with a description of a new species

Oncometopia batesi Distant, described from northern Brazil (State unknown), is transferred to the genus Hyogonia China. Hyogonia brasiliana sp. nov. is described from Northern Brazil, Pará State, the easternmost record of the genus. The new species is easily distinguished from all other Hyogonia species by the following combination of characters: (1) pronotum without distinct transverse contrasting band; (2) pygofer with short processes that do not attain its apex; (3) both pairs of aedeagal atrial processes divergent and short, never longer than aedeagal shaft; and (4) aedeagal caudal pair of atrial processes with bases close to each other, appearing as a single bifurcated robust process. Hyogonia batesi and H. brasiliana, together with an unidentified female from Acre State, represent the first authentic records of the genus Hyogonia from Brazil. Previous records of H. reticulata (Melichar) and H. youngi Emmrich and Lauterer from Brazil are erroneous as their recorded locality ‘Cumbase’ is most probably located in Peru (San Martín Department). Other new records from countries and major federal divisions are noted as follows: the genus Hyogonia (unidentified species) from Barinas State (Venezuela); H. batesi from Ecuador (Orellana Province); H. reticulata from Amazonas and Junín Departments (Peru); and H. youngi from Ecuador (Napo Province). A key to the known species of Hyogonia is provided.     

Two new South American species of Acrobelus Stål (Hemiptera: Cicadellidae: Cicadellinae) with a key to the species of the genus

Two new leafhopper species of the Neotropical genus Acrobelus Stål, 1869 are described and illustrated: A. nessimiani sp. nov. from Peru (Amazonas Department) and A. rakitovi sp. nov. from Ecuador (Orellana Province). The two new species, distinguished from the other Acrobelus species by their remarkably long male subgenital plates and by the fusiform macrosetae present on these plates, seem to be closely related. A key to male specimens of the five known species of Acrobelus is provided. Taxonomic notes on the genus are included.     

Effects of feeding on healthy and diseased corn plants on a vector and on a non-vector insect

Insect-transmitted plant pathogens can have positive, negative or no effects on the vector insect. Effects could be direct (caused by the pathogen) or indirect (mediated by changes in the plant). Pathogen effects on non-vector insects are less well known.Peregrinus maidis (Ashmead) (Homoptera: Delphacidae), an insect that is not a vector of the corn stunt spiroplasma (CSS), weighed less 15 days after feeding on CSS-infected corn plants relative to insects feeding on healthy corn plants. Fecundity of non-vector insects that were removed from diseased plants was higher than for insects coming from healthy plants. ForDalbulus maidis (DeLong & Wolcott) (Homoptera: Cicadellidae), an insect that transmits CSS, there were no differences in weight, longevity, eggs per day, weekly or total fecundity after feeding on healthy or on CSS-infected corn plants. Significant differences in some phloem amino acids were detected between healthy and CSS-infected plants. Infected plants also showed an increased phloem acidity as disease symptoms progressed. Feeding on CSS-infected corn plants by an insect that does not vector the pathogen infecting the plant can have favorable consequences as evidenced by an increased fecundity.Scientific aritcle no. 8819, contribution no. A-6605 of the Maryland Agricultural Experiment Station.     

中国海南铲头叶蝉属(半翅目:叶蝉科)一新记录种

记述中国海南铲头叶蝉属1新纪录种莫氏铲头叶蝉Hecalus morrisoni Rama SubbaRao Ramakrishnan,检视标本保存于贵州大学昆虫研究所(GUGC)。     

中国类带叶蝉属一新种记述（半翅目，叶蝉科，角顶叶蝉亚科）

记述类带叶蝉属Scaphoidella Vilbaste 1新种，即短茎类带叶蝉，新种Scaphoidella brevissima sp．nov．，新种与Scaphoidella unihamata（Li et Kuoh）相似，主要区别在于本新种体小，颜面具褐色横纹，生殖基瓣近似三角形，阳茎干和阳茎侧突明显不同。新种...     

中国角顶叶蝉亚科一新纪录种（半翅目：叶蝉科）

记述中国角顶叶蝉亚科1新纪录种：小头平冠叶蝉Gurawaminorcephala Singh—Pruthi,1930,提供了成虫外形照片及雄性外生殖器结构特征图。研究标本保存于贵州大学昆虫研究所（GUGC）。     

贵州带叶蝉属一新种记述(同翅目:叶蝉科:殃叶蝉亚科)

记述带叶蝉属1新种,即爪茎带叶蝉Scaphoideus ungulaedeagus Wang et Lisp．nov．新种模式标本保成在贵州大学昆虫研究所。     

片角叶蝉亚科——中国新纪录属种（半翅目：叶蝉科）

记述片角叶蝉亚科1中国新纪录属和新纪录种,即缺缝叶蝉属Busonia Distant,1908和黑缘缺缝叶蝉Busonia amentata Distant,1908。研究用标本保存在贵州大学昆虫研究所。