Reports were coded and analyzed according to subjects' age, gender, race, institutional placement and status, type of self-destructive behavior, and date of incident. The mutilators' ages ranged from 17 to 70 years, but 82 percent were 30 or younger. During the reporting period, 376 men (3.9 percent of the male inmates) and 7 women (2 percent of the female inmates) engaged in SMB. Of the total sample of 383, 292 were white, 90 were black, and 1 was Hispanic. Types of intentional SMB observed included self-lacerations, self- choking, medication overdoses, and self-burning. Other incidents included ingestion of non-digestible objects such as metal or glass, self-shock, poisoning, and jumping from high places. Restrictiveness of institutional status was coded as high or low. Although less than 7 percent of the inmate population was restricted at any given time, 82.6 percent of the self-mutilators were on restrictive status. Self- mutilations occurred most frequently during hot weather. The report also contains 3 tables and 35 references.