_Anjel_ reports the following case of periodic psychopathia sexualis, associated with menstruation. A lady of quiet disposition, near the climacteric. Serious congenital predisposition. During youth suffered from attacks of minor epilepsy. Married, but childless. Several years ago, after violent emotional disturbance, she had a hystero-epileptic seizure, followed by post-epileptic mania lasting several weeks. Thereafter, insomnia for several months. As a sequel, continually recurrent menstrual insomnia, accompanied by an impulse to embrace boys under ten years of age, to kiss them, and to handle their genital organs. Impulse toward coitus, to close sexual contact with a grown man, non-existent at this time. The patient often speaks openly of her morbid impulse, and begs that she may be supervised, as she feels unable to answer for her own conduct. In the intervals, however, she carefully avoids all reference to the matter, is strictly decent in her conduct, and in no way sexually ardent. Tribadism is frequently mentioned by the writers of classical antiquity, especially by those of Greece, where the cult of naked beauty encouraged sexual excitement of this character. This form of unchastity was common among the flute-playing girls of Greece, and at the secret festivals of such associates Aphrodite Peribasia was invoked. _Lucian_, in his dialogues of hetairai, depicts the intensely passionate nature of these homosexual unions between girls. _Lombroso_ reproduces _Juvenal’s_ description of such a love-feast. “When the flute calls to the dance, the mænads, inflamed with wine and beer, loosen their long tresses, they sigh languishingly and eagerly, and an ardent desire draws them one to another, the desire and the passion of the dance gives their voices an alluring sound; nothing now can serve to bridle their unrestrained desires. _Lacasella_ swings her wreath, which she has won in the contest of lascivious gestures and movements, but even she must give way before Medullina with her ardent postures. About these games there is no trace of unreality, and the most rigid Spartan, hardened from the very cradle, even old Nestor himself, notwithstanding his hernia, could not fail to be stimulated by such an inflammatory spectacle.”