The author describes the micro-anatomy and cytology of a gland, situated in the male copulation-apparatus of T. infestans. The gland is composed by two groups of hypodermic and glandular cells, found in the large intersegmental membrane between the 8th and 9th segment. The cells are of an evaluated type, characterized by their separation from the cuticle, by a complicated secretion-apparatus, by a well developed zona radiata and by the beginning of a closed glandular complex.