Abstract: This study aimed at investigating the diversity of Coleoptera in the Altay Mountains in Xinjiang based on the insect specimens from the Insect Collection of Xinjiang University and the field survey in 6 national forest farms in the Altay Mountains in 2015.A total of 2 061 Coleoptera in 129 species,85 genera and 22 families were collected from the Altay Mountains.The diversity analysis indicated that the dominant groups were Chrysomelidae and Scarabaeidae,which accounted for 43.76% (31.44%,12.32%) of the total number of Coleopteran species,and Pallasiola absinthii(Pallas) and Gymnopleurus flagellates(Fabricius) were the dominant species.Biodiversity analysis showed that the Shannon-Wiener index at family level was the highest in Fuyun Forest Farm (2.18),and then in Fuhai Forest Farm (2.17).Shannon-Wiener index at species level was the highest in Fuhai Forest Farm (3.01).Margalef indexes at species and family levels were the highest in Fuhai Forest Farm (2.79,7.94).The similarity coefficient between Fuhai and Fuyun forest farms at family level was the highest (0.17).Because the vegetation and habitat types in the Burqin and Altay forest farms were similar,the similarity coefficient between the Burqin and Fuyun forest farms at species level was the highest (0.82) due to the similarity of both vegetation and habitat types.The results showed that there were the differences in species richness,species composition and abundance of Coleoptera insects among different forest farms in the Altay Mountains.

Key words: Coleoptera, species, biodiversity, distribution, Altay Mountains