In most of a group of 107 patients with onset of epileptic seizures late in life, cerebrovascular disease of some type was presumed to be the cause of seizures. This study suggests that in the absence of definite evidence of an intracranial tumor, such a tumor is unlikely. The prognosis was favorable in most patients, and the over-all life expectancy was not markedly reduced. The duration of symptoms varied from less than 1 yr. to more than 20 yrs., and frequency of occurrence of seizures varied greatly. Focal seizures, predominantly of the temporal lobe variety, were seen in over half the patients. There was some indication that the eeg. was of value in the establishment of the proper diagnosis and prognosis. The onset of seizures late in life is not necessarily a cause for undertaking exhaustive diagnostic procedures as a substitute for competent clinical and electro-encephalographic evaluation.