叶蝇科隶属于双翅目，环裂亚目，无瓣类，有缝组，鸟蝇总科，世界性分布。幼虫多为腐食性，能够取食腐殖质和藻类等，成虫一般在落叶、枯草、腐木或鸟巢附近活动。开展对该类昆虫的研究具有重要的生态学意义和一定的经济意义，但目前叶蝇科在中国的种类缺少系统的区系研究和修订工作。本项目拟开展中国叶蝇科的分类、修订以及系统发育研究。该项目将系统厘定中国叶蝇科的种类，发现并描述新分类单元；通过比较形态学研究，归纳叶蝇科各亚科以及属内系统发育关系；进而建立和完善中国叶蝇科的分类系统。本项目研究结果将丰富中国叶蝇科物种多样性，对叶蝇科世界性的修订工作，以及中国叶蝇科的系统研究提供重要的资料，对丰富叶蝇科的种群数量以及叶蝇科的系统发育研究起到极其重要的作用。

The family Milichiidae belongs to Carnoidea, Schizophora, Acalyptrata, Cyclorrhapha, Diptera, which is distributing in the world. The larvae of most species are generally saprophagous and feed on decaying plants, algae; adults live in fallen leaves, withered grasses, decaying wood and bird’s nests. Thus, it is meaningful and necessary for ecological study and pest control to investigate this group of insects. Since the fauna of Chinese Milichiidae had not been studied systematically, a great number of species had not been determined or described, and the phylogenetic relationships within the genus or those between the genus and other related genera were not clear, this project aims to research on the taxonomy and phylogeny of Chinese Milichiidae. In this research, a taxonomic revision of the Chinese Milichiidae and new taxa will be discovered and described; diagnostic characters of Milichiidae and some groups will be summarized after a comparative morphological study; a phylogenetic study will be did to reveal the phylogeny of Milichiidae, and to resolve the monophyly; then a better system of the family will be reconstructed. The results would provide the available data for a future survey of biodiversity of Milichiidae in China, which would be also important for the future study of the systematics of Milichiidae in the world.