Abstract: The digestive system of Sarcoptes scabiei is described by means of light and electron microscopy.It may be divided into pharynx,esophagus,midgut,paired lateral caecae,colon,rectum,anus and salivary glands.The epithelial cells of midgut and lateral caecae are divided into aqamous cells,columnar cells,round cells undergoing nuclear degeneration and completely degenerated cells,which show different functions.The large paired salivary glands lie anterior and lateral to the anterior midgut.They consist of about 4-6 large cells which may be divided into three stages.