*Corresponding author's address:
null
Electron microscopic studies showed the presence of six types of haemocytes in the haemolymph of Rhynchophorus ferrugineus namely the prohaemocytes, plasmatocytes, granulocytes, adipohaemocytes, oenocytoids and spherulocytes. A comparison of cell size and nuclear size of haemocytes in the different stages of red palm weevil indicated that prohaemocytes are the smallest of all the haemocyte types, and adipohaemocytes are the biggest of all. All the cells in R. ferrugineus were bigger in size during the early larval stages than the adult stages except plasmatocytes where reverse was true.
