a survey of the infestation rate of M. colonies by the endoparasitoid Vertica was conducted in Penang Island, from April to December 2015. of the 313 M. colonies surveyed 105 (33.5%) were parasitized by V. A. high frequency was recorded in balik pulau. parasitized mound were not found in air itam (28 surveyed mounds) and Jelutong. in all of the surveyed sites, the parasitized colonies were recorded as healthy. the heght and diameter of parasitized mounds was significant higher and larger than those of the not-parasitized ones.