Phylum Arthropoda (Arthropods) ➔ Subphylum Hexapoda (Hexapods) ➔ Class Insecta (Insects) ➔ Order Hymenoptera (Sawflies, wasps, ants, bees) ➔ Family Ichneumonidae (Ichneumon wasps)

Diplazon laetatorius (Fabricius, 1781)

Synonyms:

Diplazon albovarius (Wollaston, 1858) | Diplazon attractus (Say, 1835) | Diplazon balearicus (Kriechbaumer, 1894) | Diplazon cinctipes (Holmgren, 1868) | Diplazon dichrous (Schrank, 1781) | Diplazon generosus (Cameron, 1898) | Diplazon ikiti (Cheesman, 1936) | Diplazon senegalensis (Ferriere, 1925) | Diplazon sycophanta (Cresson, 1868) | Diplazon terminalis (Davis, 1895) | Diplazon tripicticrus (Walsh, 1873) | Diplazon varipes (Smith, 1878) | Diplazon venustulus (Saussure, 1892) |

  • Diplazon laetatorius, female  3834
    Diplazon laetatorius (Fabricius, 1781)     
    Diplazon laetatorius, female; det. Camille Thirion
    DE, Chemnitz, Zeisigwald; 2010-07-31 10:51:57
    Image number: 3834
    female
    DE, Chemnitz, Zeisigwald
    2010-07-31 10:51:57
    det. Camille Thirion
  • Diplazon laetatorius, female  3835
    Diplazon laetatorius (Fabricius, 1781)     
    Diplazon laetatorius, female; det. Camille Thirion
    DE, Chemnitz, Zeisigwald; 2010-07-31 10:51:49
    Image number: 3835
    female
    DE, Chemnitz, Zeisigwald
    2010-07-31 10:51:49
    det. Camille Thirion
  • Diplazon laetatorius, female  3836
    Diplazon laetatorius (Fabricius, 1781)     
    Diplazon laetatorius, female
    DE, Chemnitz, Zeisigwald; 2010-07-31 10:51:59
    Image number: 3836
    female
    DE, Chemnitz, Zeisigwald
    2010-07-31 10:51:59

  • Diplazon laetatorius, host pupa  7257
    Diplazon laetatorius (Fabricius, 1781)     
    Diplazon laetatorius, host pupa
    ES, Fuerteventura, Costa Calma; 2015-12-10 09:10:01
    Image number: 7257
    host pupa
    ES, Fuerteventura, Costa Calma
    2015-12-10 09:10:01

  • Diplazon laetatorius, hatched  7253
    Diplazon laetatorius (Fabricius, 1781)     
    Diplazon laetatorius, hatched
    ES, Fuerteventura, Costa Calma; 2015-12-26 10:01:10
    Image number: 7253
    hatched
    ES, Fuerteventura, Costa Calma
    2015-12-26 10:01:10

  • Diplazon laetatorius, female  7254
    Diplazon laetatorius (Fabricius, 1781)     
    Diplazon laetatorius, female
    ES, Fuerteventura, Costa Calma; 2015-12-26 15:50:26
    Image number: 7254
    female
    ES, Fuerteventura, Costa Calma
    2015-12-26 15:50:26

  • Diplazon laetatorius, female  7255
    Diplazon laetatorius (Fabricius, 1781)     
    Diplazon laetatorius, female
    ES, Fuerteventura, Costa Calma; 2015-12-26 14:38:19
    Image number: 7255
    female
    ES, Fuerteventura, Costa Calma
    2015-12-26 14:38:19

  • Diplazon laetatorius, female  7256
    Diplazon laetatorius (Fabricius, 1781)     
    Diplazon laetatorius, female
    ES, Fuerteventura, Costa Calma; 2015-12-26 15:45:19
    Image number: 7256
    female
    ES, Fuerteventura, Costa Calma
    2015-12-26 15:45:19


Classification:
Diplazon laetatorius belongs to the subfamily Diplazontinae.
Annotation:

In Fuerteventura I found 2 puparia of hoverflies on Oleander (Nerium oleander) populated with many yellow plant lice. From the first puparium, a Marmalade Hoverfly (Episyrphus balteatus) developed, whose larvae feed on aphids mainly.
A few days later the ichneumonid Diplazon laetatorius shown here emerged from the second puparium. It feeds as larva from the hoverfly host, kills the hoverfly larva and completes its development in the puparium of the host.
Diplazon laetatorius is an almost worldwide common species. The Diplazontinae are koinobiont endoparasitoids of hoverflies.



References, further reading, links:
  1. Dicky S. Yu, Kees van Achterberg & Klaus Horstmann: World Ichneumonoidea 2011, Taxapad 2012