Supplements to species groups of the subgenus Homoneura in China (Diptera: Lauxaniidae: Homoneura), with descriptions of twenty new species .

The following twenty species are new to science: Homoneura (Homoneura) longifurcata sp. nov. and H. (H.) triprocessa sp. nov. in the H. (H.) abnormis group; H. (H.) quadristriata sp. nov. in the H. (H.) bistriata group; H. (H.) subulifera sp. nov. and H. (H.) triangulata sp. nov. in the H. (H.) formosae group; H. (H.) dadongshanica sp. nov., H. (H.) denticulata sp. nov., H. (H.) simigrandis sp. nov., H. (H.) tianjingshanica sp. nov. and H. (H.) zhangjiajiensis sp. nov. in the H. (H.) henanensis group; H. (H.) hamata sp. nov. in the H. (H.) lii group; H. (H.) degenerata sp. nov. in the H. (H.) sauteri group; H. (H.) falcata sp. nov., H. (H.) fengyangshanica sp. nov., H. (H.) hongmaoensis sp. nov. and H. (H.) zhejiangensis sp. nov. in the H. (H.) singularis group; H. (H.) shunxica sp. nov. in the H. (H.) striatifrons group; H. (H.) bicuspidata sp. nov. and H. (H.) noticomata sp. nov. in the H. (H.) trispina group; H. (H.) jianlingensis sp. nov. in the H. (H.) unguiculata group. The H. (H.) interrupta Sasakawa, 2001 and H. (H.) strigata (Mejere, 1910) are recorded for the first time in China. Two synonyms are proposed, including H. (H.) beijingensis Gao & Yang, in Wang, Gao & Yang, 2012 as a junor synonym of H. (H.) henanensis Yang, Zhu & Hu, 1999, H. (H.) trunciformis Shi & Yang, 2009 as a junor synonym of H. (H.) ornatifrons (Kertész, 1913).