In this paper, 1 new genus and 1 new species of leafhopper subfamily Mukariinae (Hemiptera: Cicadellidae) from Guizhou Province, China, Pseudomohunia gen. nov. and P. nigrifascia sp. nov., attacking Chimonobambusa Makino (Gramineae: Bambusoideae), are described and illustrated. This new genus is closely related to Mohunia Distant, but can be distinguished from the latter by the forewing with 4 apical cells, the aedeagus with 2 gonopores, dorsoatrium short, and the connective Y-shaped. All type specimens are deposited in the Institute of Entomology, Guizhou University.%记述采自我国贵州省雷公山国家级自然保护区狭叶方竹上的叶蝉科昆虫1新属1新种,即拟痕叶蝉属和黑带额痕叶蝉.根据头部颜面构造、前后翅端部翅脉、腿节刚毛公式、下生殖板及阳基侧突等特征,该属应隶属于额垠叶蝉亚科,与痕叶蝉属近缘,主要区别特征为:前翅具4个端室(后者前翅具3个端室);阳茎具短背腔(后者阳茎简单,无背腔),有2个性孔(后者仅1个性孔);连索"V"形(后者连索"Y"形).模式标本保存于贵州大学昆虫研究所.
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