Abstract: The tea geometrid, Ectropis grisescens Warren is a major defoliator of tea trees. The morphology and histology of internal and external reproductive organs of the female adult insects were described here using both anatomical sections and microscopic observation. The female adult reproductive organs were comprised of a pair of ovaries, two lateral oviducts, one common oviduct, spermatheca, accessory gland, oviporus, corpus bursae and associated parts, ductus seminalis, apophyses and papillae anales. Each ovary contained eight symmetrical ovarioles. The corpus bursae was a typical bag structure and possessed a heart-shaped signum which covered 16 symmetrical spines on the surface of both sides. The apophyses posteriores was slender and shovel-like. Nurse cells and oocytes were arranged alternately in polytrophic ovarioles. The ovipositor possessed a well-developed gonad. This study was the first research on the genital structure of female adult of E. grisescens Warren. The results provided guidance for the study of ovarian development, field forecasting, and identification of related species.

Key words: Ectropis grisescens Warren, female adult, reproductive organ, paraffin section, ultrastructure