The ovarioles, which are cylindrical or tapering units, compose the majority of insect ovaries. Moreover, each ovariole comprises the terminal filament, the egg tube (germarium and vitellarium), and the pedicel. Additionally, a mature egg tube is divided into two parts: i) Germarium, which includes germ cells that are actively dividing, and ii) Vitellarium, the location where egg cells develop and reach their full size. Following the presence or lack of nutritive cells in the egg tube, the egg tube may be classified as panoistic or meroistic. Furthermore, the meroistic ovariole type is divided into the telotrophic and polytrophic types. Consequently, this study aims to observe differentiation between telotrophic and polytrophic types according to the position of nutritive cells in egg tubes using transmission electron microscopy.