It is true that in the previous literature, under the head of pathological liars, cases of epilepsy, insanity, and mental defect have been cited, but that is misleading. A clear terminology should be adopted. The pathological liar forms a species by himself and as such does not necessarily belong to any of these larger classes. It is, of course, scientifically permissible, as well as practically valuable, to speak of the epileptic or the otherwise abnormal person through his disease engaging in pathological lying, but the main classification of an individual should be decided by the main abnormal condition. A good definition of pathological accusation follows the above lines. It is false accusation indulged in apart from any obvious purpose. Like the swindling of pathological liars, it appears objectively more pernicious than the lying, but it is an expression of the same tendency. The most striking form of this type of conduct is, of course, self-accusation. Mendacious self- impeachment seems especially convincing of abnormality. Such falsification not infrequently is episodic. The inclusion of swindling in our discussion is due to the natural evolution of this type of conduct from pathological lying. Swindling itself could hardly be called a pathological phenomenon, since it is readily explicable by the fact that it is entered into for reasons of tangible gain, but when it is the product of the traits shown by a pathological liar it, just as the lying itself, is a part of the pathological picture. It is the most concrete expression of the individual's tendencies. This has been agreed to by several writers, for all have found it easy to trace the development of one form of behavior into the other. As Wulffen says, ``Die Gabe zu Schwindeln ist eine `Lust am Fabulieren.' '' Over and over again we have observed the phenomenon as the pathological liar gradually developed the tendency to swindle. Notwithstanding the grave and sensational social issues which arise out of pathological lying, accusation, and swindling, there is very little acquaintance with the characteristics of cases showing this type of behavior, even by the people most likely to meet the problems presented. Lawyers, or other professional specialists have slight knowledge of the subject. Perhaps this is due to the fact that the pathological lying does not follow the usual lines of abnormal human behavior, unless it be among the insane where other symptoms proclaim the true nature of the case. Another reason for the slight acquaintance with the subject is the fact that almost nothing has been written on it in English.