Stilbosis extensa is a moth in the family Cosmopterigidae. It was described by Annette Frances Braun in 1919. It is found in North America where it has been recorded from California.[1] [2]
The wingspan is 7.5–9 mm. The head, thorax and forewings are clothed with whitish-tipped gray scales. There are four patches of blackish raised scales on the forewings, each margined inwardly with dull whitish. The hindwings are gray.[3]