Similar to the Grapevine Moth (P. glycinae) but has different wing markings.
See: https://lepidoptera.butterflyhouse.com.au/agar/tristifica.html
The larva feeds on Epilobium and Oenothera.
Phalaenoides tristifica is listed in the following regions:
Canberra & Southern Tablelands | Grampians
Places
Ballarat Central, VIC