Pontania proxima (Willow gall sawfly)

The willow gall sawfly has been introduced to Australia.  It originates from Europe and Western Asia.  It lays eggs in willow leaves and causes red/green galls.

Pontania proxima (Willow Gall Sawfly), around 5mm
Mid October 2018
Hobart
Found indoors.
             

Early January 2013
Franklin
In a yard with a large willow.
 

References

Kay, M.K. 1980: Pontania proxima (Lepeletier) (Hymenoptera: Tenthredinidae). Willow gall sawfly. New Zealand Forest Service, Forest and Timber Insects in New Zealand No. 45.