Dichrorampha petiverella (Linnaeus, 1758)
49.3210 (B&F: 1273)
Dichrorampha dorsana (Fabricius, 1775)
A resident species, scarce in both vice-counties and only occurring singly, chiefly on the Downs and near the coast. In decline. Single-brooded, flying mainly from late May to early August. Larvae feed in the roots of yarrow and tansy. (Pratt, 2011).