Longalatedes elymi

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Longalatedes elymi, commonly called the Lyme grass, is a moth in the Noctuidae family. It lives along coastal areas of southern Sweden, southern Finland, Denmark, Estonia, northern Poland, northern Germany, and eastern Great Britain.

What it looks like
- Forewings are bone-coloured with a pale brown tint between the veins; the veins are a little darker.
- The outer line appears as a double row of dark spots.
- Hindwings are pale luteous white.
- A darker brown form is known as saturatior.
- Wingspan is about 36 mm.

When it’s active
- Adults are on wing from June to August.

Life cycle and habitat
- The larvae feed inside the stems of Elymus arenarius (Lyme grass), usually below the surface of the sand.
- Larvae are bone-coloured, sometimes with a yellow or reddish tinge; head is reddish brown.

Taxonomy note
- This species has been described under several other scientific names in the past, such as Leucania elymi and Chortodes elymi.