The seasonal population dynamics and within- plant distribution of the seychellarum mealybug, Icerya seychellarum on Hedera helix plants was carried out at the Farm of Faculty of Agriculture, Assiut University during two successive seasons, 2012/2013 and 2013/2014. Results of both seasons revealed that the highest numbers of nymphs and the total number of the pest were recorded during the last week of August. The highest percentages of the total monthly mean count (out of the total year count) were found to be 30.57and 33.24%, in August during the 1^st and 2^nd years, respectively. In addition, mealybug has four generations per year under the field conditions. The effect of weather elements on the pest population was also studied. Concerning the plant heights leaves and branches, the results indicated that the bottom portion had more insects than those of the middle or the top portions. As for the leaf surface, the lower surface sheltered more individuals than those of the upper surface. Leaves harbored a large number of insects than those of branches. Differences in seasonal patterns and within plant distribution should be considered in developing sampling protocols and managing plans for seychellarum mealybug control.