Incurvaria masculella, the feathered diamond-back, is a moth of the family Incurvariidae. It is found in Europe. The wingspan is 12–16 mm.Head pale ochreous, ferruginous-tinged. Forewings rather dark purplish bronzy-fuscous ; a whitish triangular dorsal spot before middle, and a smaller one before tornus. Hindwings rather dark grey. The moth flies from April to June depending on the location. The larvae feed on oak, sweet chestnut, Corylus avellana, Tilia, Carpinus betulus, rose, Vaccinium and Crataegus.

Incurvaria oehlmanniella is a moth of the family Incurvariidae. It is found in Europe and across the Palearctic to eastern Siberia. Its wingspan is 12–16 mm. Head deep ochreous yellow. Forewings dark bronzy-fuscous, mixed with purplish ; a subtriangular dorsal spot before middle, a smaller one before tornus, and a third sometimes nearly obsolete on costa at 3/4 pale yellowish. Hindwings rather dark purplish-grey.It flies from April to July, depending on the location. The larvae feed on bilberry, cloudberry, Swida and Prunus.

The wingspan is 9 - 12 mm.Adults have metallic blue forewings with a black area at the wingtip. The head is orange or yellowish.