Quantitative changes in the total proteins, carbohydrates and lipids during embryogenesis ofAtractomorpha cremulata (Fab) are provided. The protein and carbohydrate contents of the egg increase after 4 days of incubation until just prior to hatching when there is a slight fall. Lipid content shows a steep increase on the 6th day of incubation. Qualitative gel electrophoretic analysis revealed as many as 14 protein fractions at various stages of embryogenesis. These observations are discussed based on densitometric scanning studies.