The morphology of the quitinized structures related to the spermatheca of five Muscidae species is described and illustrated: Atherigona orientalis Schiner, 1868; Stomoxys calcitrans (Linnaeus, 1758); Muscina stabulans (Fallén, 1817); Ophyra solitaria Albuquerque, 1958 and Hydrotaea nicholsoni Curran, 1939.
Descriptions; illustrations; morphology
