Megarhyssa nortoni nortoni (Cresson)
- Body length 15–45 mm. Ovipositor twice as long as body.
- Introduced from North America in 1962 and 1964.Now established in many forest areas.
- One of several parasites of larval wood wasp, Sirex noctilio
- Long ovipositor to deposit eggs on Sirex grubs deep in timber
- Adults feed on nectar or honeydew