Giant Cells in Insects Parasitised by Hymenopterous Larvæ

Abstract

IN a recent paper, A. Paillot¹ directs attention to the giant cells present in aphids parasitised by Hymenoptera, and he affirms that these cells originate from the sexual cells of the host. In support of this conclusion, Paillot states that he has once observed in a female of Chaitophorus aceris, parasitised by Aphidius ribis, Hal. a group of cells (considered by him to be germinal cells) in process of dispersion, and that these elements already showed the structure of giant cells.