Morley’s Final Catalogue: This species, usually frequent among Stachys, seems peculiarly rare with us; unnoted in the east. Found in the Breck at Tuddenham
Recent Status: Rare in Suffolk records. Possibly under-recorded.
Life Style: A double brooded species that flies between May and September. The larvae feed from a spinning on the flowers and seeds of Betonica officinalis, Galeopsis, Rhinanthus minor, Pedicularis sylvatica and P. palustris. It has also been reported as reared from seedheads of Dipsacus fullonum on one occasion. The larvae may hibernate and they pupate in the larval habitation.
Identification: There are three similar dark brown and white Endothenia species, E. gentianaeana, E. marginana and E. oblongana, that can be separated as follows. The hindwings of E. marginana males are white with a narrow dark border. The hindwings of E. marginana females are dark bordered becoming white at the base. The hindwings of E. gentianaeana are uniformly dark. The hindwings of E. oblongana pale slightly towards the base. E. gentianaeana is the largest at 15 to 19 mm wingspan. E. oblongana is the smallest at 11 to 15 mm wingspan. Both E. gentianaena and E. marginana have white on the top of the thorax and E. oblongana has little if any white. E. gentianaeana has more elongate wings and this results in the white band being significantly wider. The marks at the apex of E. marginana are closer to the main dark area across the white band compared with E. gentianaeana. The white band of E. oblongana is more heavily shaded than in the other species. Where these distinctions cannot be measured or seen then genitalia dissection must be carried out to determine the species. The difference in the genitalia is slight. More Info