The effects of host deprivation on the calyx cells of Nasonia vitripennis (walker) (hymenoptera: Pteromalidae)

Summary 1. The changes in the ultrastructure of the cells of the calyx in the female reproductive system of Nasonia vitripennis are described during a period extending from a condition when host puparia are readily available to a condition of prolonged host deprivation.2. In conditions when host puparia are available, the calyx cells resemble typical secretory cells with rough endoplasmic reticulum, Golgi complex and mitochondria. After periods of host deprivation the calyx cells increase in size, the organelles change and become reorientated and cytolysomes appear producing a configuration of cells undergoing autophagy.3. When host puparia become available again, the cells show an ability to recover and recommence production of secretory droplets.