Nuclear coat and viruslike particles in the midgut epithelium of Glossina morsitans sspp.

The ultrastructural aspects of the nuclear coat formation in midgut epithelial cells of pupae and adult flies of G. morsitans sspp. are described. Out of four different species of Glossina examined, this peculiar structure was only found in G. morsitans sspp. Three different types of viruslike particles were found in midgut epithelial cells. One type which is of the same kind of particle found in the salivary glands, lies inside of cytoplasmic vesicles. Two other types of particles were detected in the nuclei.