We present the first list focused on Mimallonidae from a Colombian biological collection, the Museo Javeriano de Historia Natural “Lorenzo Uribe, S.J.” (MPUJ) of the Pontificia Universidad Javeriana in Bogotá. We report nine species and seven genera, and we highlight the museum’s hidden treasures: the first known female of Bedosiallo moengus (Schaus, 1928) and a new species, Gonogramma faguai nov. sp.