The genus Proteroscelio Brues is redescribed and P. gravatus, n. sp., is described from Lebanese amber (Aptian age, 112–122 mya). The relationships between Proteroscelio and other scelionids is discussed. The described species of fossil platygastroids are tabulated. The taxa represented by the unavailable names “Eopteromalites fushunensis” Hong, “Leptogasterites brunneus” Hong, “L. furvus” Hong, and “Sinilongicapito guchengziensis” Hong, recently described from Fushun, Liaoning, China (50 mya), should all be classified as scelionids. The replacement name Sinoprotelenomus Zhang n. name is proposed for Protelenomus Zhang, 1989 (preoccupied by Protelenomus Kieffer, 1906).