Respiratory metabolism of resting moths of the cotton bollworm (H. armigera) was determined at 25℃ with a Gilson Differential Respirater. Metabolic rates (μlO2/mg wet weight/h) of both females and males throughout their lives exhibited U-shaped curves and showed marked circadian rhythms. Oxygen consumption of these moths was also measured at different temperatures, after feeding, in the dark, during hungry and flying periods. It was estimated that the resting female and male adults consumed, on the average,...