The length of the forewings is 5.6 millimetres (0.22 in).[1]
Etymology
The species name is derived from Latin arena (meaning sand).[1]
References
^ abcdKaila, L. (1997). "A revision of the Nearctic species of Elachista s. l. II. The argentella group (Lepidoptera, Elachistidae)". Acta Zoologica Fennica. 206: 1–93.