The eggs of C. marginatus were singly laid in cotton batting and were usually separated from each other. On the average, the elongated eggs were 1.72±0.01 mm long and 1.08±0.01 mm wide. The eggs were yellow upon deposition but changed to brown after embryonic development. Variable shaped polygons were observed on the egg surface. A ring of widely separated aero-micropylar tubercles was observed and well-marked operculum intersects the ring micropyles. The hatching line was cracked in a circular shape by an egg burster.