Two new species in the genus Eumerus Meigen(Diptera:Syrphidae)from Inner Mongolia,China  

中国内蒙古平颜蚜蝇属二新种记述(双翅目:蚜蝇科)

作　　者：Mixia SONG Aiping LIU Keke HUO Li SHI Lin GAN 宋米霞;刘爱萍;霍科科;史丽;甘霖(中国农业科学院草原研究所,内蒙古呼和浩特市010010;陕西理工大学,生物科学与工程学院,陕西汉中723000;内蒙古农业大学,园艺与植物保护学院,内蒙古呼和浩特市010019;阿拉善盟科技信息研究所,内蒙古阿拉善盟750399)

机构地区：[1]Institute of Grassland Research of the Chinese Academy of Agricultural Sciences,Hohhot,Inner Mongolia 010010,China [2]College of Bioscience and Engineering,Shaanxi University of Technology,Hanzhong,Shaanxi 723000,China [3]College of Horticulture and Plant Protection,Inner Mongolia Agriculture University,Hohhot,Inner Mongolia 010019,China [4]Alxa Institute of Science and Technology Information,Alxa,Inner Mongolia 750399,China

出　　处：《Entomotaxonomia》2020年第4期275-281,共7页昆虫分类学报（英文）

基　　金：This research is supported by the science and technology project of Alxa League(AMYY202020-1).

摘　　要：This paper describes two new species in the genus Eumerus Meigen,1822(Diptera:Syrphidae)from Alashan Right Banner of China.Eumerus alxaensis Huo&Liu sp.nov.is similar to E.tuberculatus Rondani,but differs from the latter by mesonotum without whitish pollinose middle stripes,tergite 4 with distinctly L-shaped whitish pollinose bands,eyes with long and dense hairs in male but shorter in female,hypandrium ventrally with a semicircular sheet protruding on the middle of lateral margins.Eumerus seximaculatum Huo&Liu sp.nov.is allied to E.strigatus(Fallén),but differs from the latter by eyes bare,vertex covered with pale yellow hairs,whitish pollinose bands on broader tergites,sternite 4 of male with deeply concave posterior margin and male terminalia distinctly different.本文记述采自内蒙古自治区阿拉善右旗的平颜蚜蝇属2新种,即阿拉善平颜蚜蝇:Eumerus alxaensis Huo&Liu sp.nov.和六斑平颜蚜蝇:Eumerus seximaculatum Huo&Liu sp.nov.。前者近似疣腿平颜蚜蝇E.tuberculatus Rondani,但新种中胸背板缺白色粉被中条纹,第4背板白斑呈“L”型,雄性复眼被毛长而密,雌性复眼被毛短,雄性第九腹板腹面两侧中央具半圆形叶状突起;后者近似洋葱平颜蚜蝇E.strigatus(Fallén),但新种复眼裸,头顶被毛浅黄色,腹部背板上的斑较宽,雄性第4腹板后缘凹入深,雄性尾器明显不同。

关 键 词：Eristalinae Eumerini hover flies taxonomy 

分 类 号：Q969.44[生物学—昆虫学]