Abstract
Morphology and histology of spermatheca of seven orthopteran insects is compared. None of the spermathecae are associated with spermathecal accessory gland. Observations reveal that the spermatheca, which is in the form of a sac, has single layered epithelium while spermatheca with apical appendage, or in the form of sperm storing tubules, has double-layered epithelium. The double-layered epithelium is probably more evolved where the outer layer is secretory and the inner is chitogenous in nature.
