Appearance
The wingspan is 42–50 mm. The length of the forewings is 16–23 mm."Forewing dull white, finely dusted with blackish in the intervals, sometimes slightly rufous-tinged; outer line represented by a row of blackish dots, often obsolete: hindwing whitish washed with grey; sometimes with an outer series of dark spots; — the ab. c''rassicornis'' Haw.has the black dusting intensified on both wings, forming, in some instances, dark horizontal streaks in the forewing; the rows of spots in both wings strongly expressed; — ab. ''rufescens'' Tutt is the red form corresponding to ''lutosa'' Hbn. sometimes with, at others without, the rows of spots; for the more dusted red form, corresponding to ab. ''crassicornis'' Haw., Tutt has used the name ''rufescens-suffusa''. The form occurring in Japan must be separated as a subspecies griseata subsp. nov [Warren]: in the males of this the hindwings are dark grey beyond middle with the fringe pale: the forewings also are greyer ochreous with the pale veins more distinctly defined by dark scaling.2 males in Tring Museum from Ichikishiri, Yezo, August 1890, ".
Behavior
The moth flies from July to November depending on the location. Larva bone-colour with a pinkish tinge; head light brown: feeding underground in the roots of reeds.References:
Some text fragments are auto parsed from Wikipedia.
