The wingspan is 10–11 millimetres (0.39–0.43 in). Adults are on wing from late April to July. Normally, there is one generation per year, although there might be a second generation in warmer areas.
The larvae feed on Agrostis, Arrhenatherum elatius, Brachypodium sylvaticum, Calamagrostis arundinacea, Dactylis glomerata, Deschampsia cespitosa, Elymus caninus, Festuca altissima, Festuca gigantea, Glyceria lithuanica, Holcus mollis, Melica nutans, Milium effusum, Poa nemoralis and Poa remota. The larvae create a mine with a corridor widening while descending from the tip of the leaf. The larvae hibernate in the centre of the mine. After winter they leave their mine to pupate.
- "Elachista (Elachista) apicipunctella Stainton, 1849". 2.6.2. Fauna Europaea. August 29, 2013. Retrieved November 12, 2013.
- "Elachista apicipunctella". UK Moths. Retrieved March 8, 2010.
- "Elachista apicipunctella Stainton, 1849". Bladmineerders.nl. Retrieved March 8, 2010.
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