Eriocrania semipurpurella (Purplish birch-miner) is a moth of the family Eriocraniidae, found from Europe to Japan and in North America.

Edward Meyrick gives this description: Forewings elongate, bronzy-purple, more or less sprinkled with pale shining golden; an indistinct usually small transverse pale golden dorsal spot before tornus, sometimes almost obsolete; cilia bronzy-grey, on dorsal spot ochreous-whitish; 9 absent.

Larva whitish; head pale ochreous-brown, mouth darker in blotch in leaves of birch.

[1] [2] The moth flies in sunshine around birch trees (Betula species), sometimes in swarms in March and April.

[4] Eggs are laid on the leaf bud and the larvae feed on the leaves in a mine from the end of March to early-May.