Description
The dark sword-grass has pale brown forewings with dark brown and black markings and translucent hindwings, greyish white with brown venation. The hindwings have a thin dark line along the margins of the hindwings.
The moth gets its specific name from black markings on the forewings shaped like a Y and resembling the Greek letter 'ipsilon'.
The moth has a wingspan of from four to five and a half centimetres.
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