Difficult one, this. There are several species in the genus Hydrillodes, and I prefer to see them in the hand before making an i-d. The only one I'm really sure of is a male H. abavalis, which has an obvious fold of scent scales on the forewing costa. I suspect this is the female of H. abavalis, but male H. hemeusalis are very similar (but have a fold of scent scales on the ventral forewing surface).
Hydrillodes abavalis is out and about in some numbers at the moment, so this is the most likely candidate.