Telamoptilia grewiae is a moth of the Gracillariidae family. It is found in China (Tianjin). The wingspan is 6−8 mm. The forewings are greyish fuscous to blackish fuscous, the costal margin with a white spot basally at about 1/10 and one before apex, the former sometimes touching the fold posteriorly. There is some stria at the distal 3/10 and 1/6 obliquely outward, reaching the middle of the wing and near the termen respectively. There is transverse white fascia from the costal 1/3 and 1/2 obliquely outward, reaching the dorsal 1/2 and before the end of the fold respectively, edged with blackish fuscous to black scales. The hindwings are uniformly grey.