Stlegicottus xenogrammus Bolin, 1936, was described from a single small, deteriorated specimen from the southern Bering Sea. No subsequent specimens have been identified. Comparison with the holotype of Rastrinus scutiger confirms that the two specimens represent the same species, and previously reported differences between the two are likely the result of the small size and deteriorated condition of the holotype of S. xenogrammus. Because Stlegicottus xenogrammus cannot be distinguished from Rastrinus scutiger by any reliable character, the two names are treated as synonyms, with R. scutiger having priority, and Stlegicottus becomes a junior synonym of Rastrinus.