The Elachistidae are part of the superfamily Gelechioidea and are found mainly in temperate regions of the north.
These are small moths, wing span of 0.6 to 1.1 cm, with narrow lance-shaped wings which are usually white, gray or black with white spots.
The Elachistidae are essentially identical to the subfamily Elachistinae.
The Agonoxenidae could possibly belong to this family, but even this is doubtful;
however, a considerable number of genres remain in the current family, and the end is likely to be established new subdivisions.
The larvae feed on the leaves of grasses and sedges.