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Diplazon laetatorius (Fabricius)

(Life: Kingdom: Metazoa (animals); Phylum: Arthropoda; Class: Hexapoda; Order: Hymenoptera;  Superfamily: Ichneumonoidea; Family: Ichneumonidae; Subfamily: Diplazonitae; Genus: Diplazon)

Ichneumon laetatorius Fabricius, 1781. Holotype: deposition unknown. Type locality: unknown.

Photographs © Johan Heyns. Adult female Diplazon laetatorius with the host syrphid pupa it emerged from in Heidelberg, Gauteng on 27/1/2020. See facebook post.


Worldwide. Afrotropical region: Burundi, Ethiopia, Madagascar, Reunion, Rwanda, Senegal, South Africa, Sudan, Uganda, Zaire, Zimbabwe.


Parasitoid of a wide range of Diptera, especially aphidophagous syrphid flies (more than 50 host species reported in Syrphidae) (Rousse & Villemant, 2012). Males of D. laetatorius are extremely rare; females are thelytokous (Gauld et al. 1997).


Fabricius, J.C. 1781. Species insectorum. Tom. I. Hamburgii et Kilonii. 552 pp.

Gauld, I.D., Wahl, D.B., Bradshaw, K., Hanson, P. & Ward, S. 1997. The Ichneumonidae of Costa Rica, 2. Introduction and keys to species of the smaller subfamilies, Anomaloninae, Ctenopelmatinae, Diplazontinae, Lycorininae, Phrudinae, Tryphoninae (excluding Netelia) and Xoridinae, with an appendix on the Rhyssinae. American Entomological Institute, Ann Arbor, USA, 485 pp.

Rousse, P. & Villemant, C. 2012. Ichneumons in Reunion Island: a catalogue of the local Ichneumonidae (Hymenoptera) species, including 15 new taxa and a key to species. Zootaxa 3278: 1–57.

Seyrig, A. 1952. Les Ichneumonides de Madagascar. IV Ichneumonidae Cryptinae. Mémoires de l'Académie Malgache. Fascicule XIX. 213 pp.


Photographs by Agničle Touret-Alby © MNHN (specimens database http://coldb.mnhn.fr)

Photographs of living specimen © Johan Heyns (Gauteng).


Next genus: Enizemum                               Next species: Diplazon marakwetensis

Web author Simon van Noort (Iziko South African Museum)


Citation: van Noort, S. 2022. WaspWeb: Hymenoptera of the Afrotropical region. URL: www.waspweb.org (accessed on <day/month/year>).

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