The eggs of E. marcellinus are unsculptured except for a pattern of numerous, incised small circles. Three larval morphs were observed: blue-green, pale brown and black. Pupation may last 7-10 days or there might be pupal diapause which is broken by moisture. The only known food plant is Oxandra lanceolata,a tree which is mostly common in the central and western parishes. The only known breeding site is at Rozelle in the eastern parish of St. Thomas, but indications are that other sites are likely to occur in central Jamaica.
