Vesicular inclusions in the nuclei of epithelial cells of Malpighian tubes of the hemipteran,Panstrongylus megistus

Summary Vesicular inclusions observed in Malpighian tubes of hemipterans have been associated with a virus-like infection rather than a lysosomal-type activity, which is the case of the identical cytoplasmic structures.This study was supported by a grant (75/907) of the Fundação de Amparo à Pesquisa do Estado de São Paulo. The authors are indebted to Dr E. O. Rocha-e-Silva for generously providing them with the insect specimens.