While variable the forewing lines on some specimens of Chrysolarentia heliacaria match the above specimen . The hindwings are important. Chrysolarentia heliacaria has quite plain hindwings, with a pale sub-terminal line - see the plain hindwings in 1st image above c.f. https://bold-au.hobern.net/specimens.php?taxid=22014 as opposed to yellow/brown and much patterned hindwings of Chrysolarentia polycarpa https://bold-au.hobern.net/specimens.php?taxid=260328