[Ultrafine structure of the malpighian tubules of hematophagous Diptera].

The ultrastructure of Malpighian tubes of 5 species of bloodsucking Diptera was studied: Culicoides pulicaris, Tabanus bromius, Hybomitra schineri, Haematopota pluvialis and Stomoxys calcitrans. The Malpighian tubes of the above species include the cells of two types. The most abundant cells of the 1st type contain many spherical inclusions which represent deposits of mineral compounds. The microvilli of the 1st type cells always contain mitochondria. Cells of the 2nd type are characterized by a smaller size, their microvilli lack mitochondria and no sphere crystals are observed in cytoplasm. Differences in the ultrastructure of epithelial cells of Malpighian tubes were found out.