Abstract: Antennal sensilla of the ghost moths Hepialus baimaensis, H. renzhiensis and H. zhongzhiensis, were observed with a scanning electron microscope. The antennae of these three species each consists of two basal segments and 21-27 flagellar segments. The sensilla can be classified into types according to their morphology. Six types of sensilla found on the antennae of both sexes include sensilla trichodea, sen silla chaetica, sensilla basiconica, sensilla coeloconica, Bohm's bristles, and sensilla squamiformia. Moreover, sensilla campaniformia occur occasionally on male's only. The sensilla trichodea are further subdivided into two subtypes (designated A and B). Each flagellar segment possesses 2-3 sensilla sub-chaetica and 1-5 sensilla basiconica. There are two subtypes of sensilla coeloconica inciuding center pegs oflong and short pattern, the sensilla lack inward slantwise fringe pegs mainly distri buted on the flagellar segments. Bohm's bristles are distributed to the scape and pedicel segment. The general pattern of numbers and distribution of these sensilla is similar in all three species. The sensilla campaniformia have marked sexual dimor phism,

Key words: ghost moths——antenna——sensilla——scanning electron microscopy