Xanthozona melanopyga (Wiedmann, 1830) (Diptera: Tachinidae) is recorded here as a parasitoid of Brassolis astyra Godart, 1824 (Lepidoptera: Nymphalidae). Dipteran endoparasitoids have been recorded as pupal endoparasitoids of Brassolis sophorae (L.), due to the scientific and economic importance of these interespecific relationships, and aiming to increase the knowledge on natural and conservative biological control, I hereby record Xanthozona melanopyga (Wiedmann) as larval-pupal parasitoid of Brassolis astyra Godart for the State of Rio Grande do Sul, Brazil. For the first time.
biological control; distribution; natural enemy; parasitoid flies