The epidemiological and genetic investigation of schizophrenic psychoses over the period 1900-1978 which has been carried out in a specific North Swedish geographical isolate was supplemented with a study of suicides. From 1890-1980 a total of 90 suicides are ascertained. 54 had at least one schizophrenic relative at a maximum genetic distance of 1/8, while 11 had schizophrenic relatives further removed.