“Among the 800 persons interrogated 65% stated that the mother was unusually energetic and self-reliant, while the father was mild and easy going, as well as diffident and easily influenced. “In my opinion these 65% represent the hereditary cases; there may be some also among the other 35% due to hereditary transmission but this, of course, I am unable to ascertain and it would be interesting to conduct a medical inquiry into the subject. “In favor of a hereditary predisposition as the most general factor stands also the fact that in many families the homosexual’s sisters or brothers show a similar tendency.” _Illustrations_ U. Sch., 26 years of age, a merchant. The mother extraordinarily self-reliant and the one who determines the course of action in every family emergency. Father good-natured fellow, easily influenced. U. Sch. has been several years ago under the care of Prof. Pilz. At the time he had some intercourse with women, but the act always caused him disgust and did not diminish his need to get into contact with men. At first he tried to oppose this leaning towards men, but after two months of struggle—during which he lost considerable weight—he had to give in again and today he maintains relations exclusively with men. His brother, six years younger than he, is an actor and is also homosexual. An older brother, also a merchant, is completely normal in his sexual life, but far from self reliant and very moody. His sister is also heterosexual, but has male traits and physical features, hairy growth on the face and a bass voice which would be considered very low even in a man. * * * * * Count X., 25 years old; a very energetic mother. His gait and movements are exceedingly feminine, he is careless and has been mixed up already in a number of unpleasant affairs from which the writer successfully helped him extricate himself. Two of his three brothers are also homosexual, and of his family circle in the wider sense, two uncles.