A medium size (approx. 3.2 cm wingspan) moth. Forwewings powdery; poorly defined antemedian and postmedian lines, median band more prominent. Terminal area suffused with dark scales. Hindwings orange-buff with a grey median line, grey scaling in the basal area and a wide black terminal band followed by white fringe. Antennae simple; sexes alike. Most similar to O. regina, which is smaller, has paler and less banded forewings and brighter yellow hingwings lacking the grey scaling in the basal half.

A western moth, found from the mountains of southwestern Alberta south to at least CO and CA.

It occurs in dry open woodland in the mountains.

Almost nothing is known. Adults are nocturnal and come to light. Like other Oncocnemis, it is single brooded, with adults in late summer and fall. The Alberta specimens were collected from late August through late September. Nothing is known of the early stages or larval hostplants.

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Species: 5
Species With Barcodes: 1