Abstract: Objective In order to determine the major species of sarcosaphagous flies and their regular activity on carcass in Hohhot district.Methods Six rabbits were killed and placed outdoors at different time from July to October in Hohhot district.Some species of sarcosaphagous flies that appeared the ca-davers were observered and identified.Results It showed that there are10main spieces belonging to3families and8genera were from Diptera,including Musa domestica domestica Linnaeus,Musa domestica vicina Maequart,Ophyra capensis(Wiedemann),Hydrotaea armipes(Fall.),Muscina stabulans(Fall.)from Museidae;Lucilia sericata(Meigen),Chrysomya megacephala(Fabricius),Lucilia cuprina(Wiedemann)from Calliphoridae;Boettcherisca peregrina(Robineau-Desvoiy),Parascarcophaga crassipalpis(Maequart)from Sacrophagidae.Besides,it showed obvious regulations that different species of sarcosaphagous flies ap-peared on carcass at different postmortem interval and the first part of carcass that sarcosaphagous flies appeared on.Conclusion It may be useful for estimating postmortem interval in Hohhot district.

Key words: Hohhot district, sarcosaphagous flies species, postmortem interval