Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Cosmopterix molybdina is a moth of the Cosmopterigidae family. It is known from the United States (Maine, Oregon, California) and Canada (British Columbia).Adults have been recorded in January.Male, female. Forewing length 4.3 mm. Head: frons and vertex shining golden bronze, neck tufts shining dark brown, collar shining leaden-gold with greenish and purplish reflections; labial palpus, first segment very short, pale brown, second segment three-quarters of the length of third, shining pale grey ventrally and apically, dorsally greyish white