Abstract: There were seven types of antennal sense organs including sensilla coeloconica, sensilla campanulate, sensilla orbiculate, sensilla basiconica, sensilla trichodea, sensilla trichodea and antennal hair in culicoides by scanning electron microscope observation. The patterns of the sense organs on the antennae were described and compared. It was found that the type, number and patterns of the sense organs were different between C. arakawae and C. schultzei , and sensilla coeloconica could be used to discriminate the two species of biting midges. The humeral pits of the same species of midges varied, but the two species of midges had same patterns of maxpalpal sensilla.