Abstract: The lycaenid butterfly Chilades pandava Horsfield (Lepidoptera: Lycaenidae) is an important pest of many species of cycas trees. It is recorded for the first time in Egypt in 2013. The adults were collected from the infested cycas trees in arboretum of Faculty of Agriculture, Alexandria University. Each part of male and female were dissected and prepared as whole mounts for light and SEM microscopic examination. Morphology of the cycas blue butterfly C. pandava (Lepidoptera: Lycaenidae), adult and the ultrastructure of its antennal sensilla were described and illustrated by SEM photographs.