Trissolcus oenone is a parasitoid wasp in the family Platygastridae, native to Australia and New Zealand.

[2] Pentatomid eggs parasitised by Trissolcus oenone develop a black ring near the top of the egg, whereas those parasitised by T. basalis turn almost entirely black.

[2] Trissolcus oenone is very common in Australia where it is known to parasitise the eggs of Biprorulis bibax, Cermatulus nasalis, Cuspicona privata, Nezara viridula, Oechalia consocialis, Oechalia schellenbergii, and Plautia affinis.

[1][3][4] In New Zealand, T. oenone has been recorded from native species Cermatulus nasalis and Glaucias amyoti, and the introduced species Cuspicona simplex, Dictyotus caenosus, Monteithiella humeralis, and Oechalia schellenbergii.

The length of development depends on the host species and temperature.