These moths are small to medium-sized insects (6 - 32 mm wingspan). The hind tarsi bear scales that are elongated and hair-like. The labial palpi are prominent, long, and recurved. The antennae are ciliated or thread-like, and may have a pectinate section. Ocelli are present in some groups while lacking in others.
The larvae of most species of Cosmet Moth feed within the leaves or other parts of plants. Some are internal parasites of Scale Insects, while others spin silken tubes or webs. Some bore within fruits and are thus of economic importance (Arnett, 2000).
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Cosmopterix cf. montisella
American Insects site