Mompha locupletella

The wingspan is 9–12 millimetres (0.35–0.47 in). There are generally two generations per year, although there is only one in the north. Adults of the first generation are on wing from the second half of May to the beginning of July. The second generation adults are on wing from August to the beginning of September.[2]

The larvae feed on Epilobium alpestre, chickweed willowherb (Epilobium alsinifolium), spear-leaved willowherb (Epilobium lanceolatum), broad-leaved willowherb (Epilobium montanum), marsh willowherb (Epilobium palustre) and Epilobium roseum. The larvae initially make a number of short corridors, either in the same leaf or different ones. The corridors initially have a central line of frass. After the corridor, an elongate blotch is made, starting at the midrib.[3] Larvae can be found from April to May and from July to the beginning of August. Pupation takes place in a white cocoon outside of the mine, attached to vegetation or leaf litter.[4]

Mompha locupletella is found in northern Europe and mountainous areas in central and southern Europe, to north-western Spain. In the east, the range extends to Zabaykalsky Krai and the Kuril Islands in Russia.

• Lepiforum e. V.
• The Barcode of Life Data Systems (BOLD)