Abstract: According to the existing specimens and related documents, the community structure and fauna of Lygus complex of Inner Mongolia were studied systematically from 2006 to 2012 using net capture method. The results showed that 5 genus 21 species were indentified. Among of them, the Lygus and Apolygus were dominant group. In the zoogeographic regions of world, the species of Palaearctic distribution were dominant, about 52.38%; and those species spanned the Palaearctic and Oriental distribution accounting for 28.58% followed. In the zoogeographic regions of China, the species of Mongolia-Xinjiang region was predominant, for 23.82%. The genetic relationship of Lygus complex distributed in Mongolia-Xinjiang region, North China region and Northeast China region were more closely. In the vegetation zone of Inner Mongolia, species of Lygus complex distributed in the typical steppe were the most (19 species), accounting for 90.48% of the total species. There were 9 species only distributed in the steppe zone, accounting for 42.86% of the total species. Research showed that Lygus complex was a kind of group which was more adapted to grassland habitat.

Key words: Inner Mongolia, Lygus complex, community structure, fauna