Hellinsia cadmus is a moth of the Pterophoridae family. It is found in North America, including Arizona (including the type location, the Huachuca Mountains) and California. The wingspan is 14–16 mm. The head is brown in front, slightly brownish above and white between the antennae. The antennae and palpi are white. The thorax and abdomen are whitish, the latter with three brown stripes below and sometimes vague traces of two above. The forewings are white, irrorated with brown. The brown scales darken the first lobe rather evenly, but are more or less blotchy elsewhere. At the base of the cleft is a white space preceded by a curved, powdery brown line which margins a patch of brown irroration joining a costal brown dash over the base of the cell. Beyond this is one other costal spot. The