Abstract: Carbohydrate levels of the fat body and haemolymph of diapausing prepupa of the sawfly Chinolyda flagellicornis (F.Smith)were determined with the thin layer chomatography and colorimetric analysis.With the development of diapause,the titres of glycogen in the fat body dropped gradually,while the titres of haemolymph trehalose were going up.The transforming relationship effected by the temperature and the diapause stages between glycogen and trehalose was found.The amount of titres of glycogen in the fat body and haemolymph trahalose in female prepupa were higher than that in male prepupa,but there was no difference of metabolism between them.