The venom gland of P. turionellae is well-developed and composed of branched tubular structures associated with the reservoir. Lumen, intima, the chitogenous cells and venom producing columnar cells are distinguishable in the fine structure of the venom gland. Intima is a cuticular sheath with a thickness of about 200 nm. It lines internal surface of the lumen and acts as a supporting framework for venom gland. The chitogenous cells, which produce intima, lie between intima and venom producing cells. The organelles of these cells are not well-developed. The mitochondria of chitogenous cells appear in an unusual form containing vacuoles. Venom producing cells have a large nucleus and a polar structure. These are che cells where the venom is synthesized. Well-developed granular endoplasmic reticulum fills cytoplasm of the venom producing cells in a condense manner. At the venom secretion site there is a vesicular organelle with a large number of microvilli. Venom producing cells also have vacuolated mitochondria. The ultrastructure of venom producing cells in insects are fundamentally similar to the ultrastructure of other gland cells. none