In March 2019, several swellings caused by mistletoe ( Viscum album L.) were collected in the south of the Province of Luxembourg to demonstrate a possible presence of Synanthedon loranthi (Králícek, 1966). Some galls were collected both on apple ( Malus domestica (Suckow) Borkh.) and hawthorn ( Crataegus monogyna Jacq . ). As a coincidental find, a caterpillar of Celypha woodiana (Barrett, 1882) (Tortricidae) was also found. This species has not been observed in Belgium for many decades and the correct identification of the only previous find is doubtful. Moreover, the specimen in question can no longer be traced, making the bred moth from the Luxembourg province the first verifiable observation from Belgium. The biology of the species is discussed here as well as its currently known distribution in Europe. Another Tortricidae, Archips podana (Scopoli, 1763), was also found on mistletoe; this species is also discussed as well as a parasitic wasp that parasitises the caterpillar. ...