Paectes arcigera is a moth in the family Euteliidae first described by Achille Guenée in 1852.

The antemedial line is thin and black and forms the ventral border of the basal spot.

The medial area between the antemedial and postmedial lines is mostly white mixed with pale gray scales.

The hindwings have dark gray marginal shading and the veins are highlighted in dark gray, with white between the veins and at the base.

The anal fold has a white and dark gray striped pattern.