In discussing prognosis and treatment we can eliminate at once consideration of pathological lying by the insane. The outcome there depends upon what can be done for the underlying psychosis. We have avoided intimate discussion of these cases, but many suggestions of the unalterableness of the full-fledged tendencies among the insane are found in the European literature cited by us. Even discussion of the outcome of the border-line cases, such as we have given examples of, needs but short shrift. Everyone knows the extreme difficulties of dealing with constitutional inferiors; marked cases are socially fit only for proper colonization. The epileptic, in default of cure of his disease, is ever going to be prone to many peculiar mental states which may involve pathological lying. The slight mental confusion of chorea, which may lead to false accusation, as we have seen in Case 23, is one of the most curable of all abnormal mental states. With proper attention to diagnosis and treatment, favorable outcome of cases of hysteria, such as that in Case 24, is frequently seen. Another type which cannot be handled except by permanent segregation is the thoroughly aberrational and socially dangerous class represented by Case 25, however one designates the type. Much more, undoubtedly, can be done for such a border-line individual as Case 12, if there is sufficient cooperation among educational and reformatory institutions and the courts. It has seemed to us that the chief cause of failure in this interesting case has been the fact that this young man could go on ever entering new social situations and finding new worlds for exploitation because no one had the means at hand for securing facts concerning his past or for ascertaining what any good diagnostician could easily perceive to be his limitations and tendencies. Very much more to the point is consideration of the actual and possible outcome in cases of pathological lying by normal individuals. Here, as in other matters where bodily, mental, and social issues are blended, no prognosis or outlook can be rationally offered without consideration of possible changes in the circumstances peculiar to the given case. First and foremost stands out the fact that cure of the tendency sometimes happens even after long giving way to it. In this statement we are not contradictory to some previous writers.