Tetracis jubararia, commonly known as the October thorn moth, is a moth of the family Geometridae. It is found in North America (see subspecies section).
The length of the forewings 17–26 mm. Adults of ssp. jubararia are on wing from mid August to late November depending upon locality and elevation. Adults of ssp. sericeata are on wing from September to mid November.
Larvae of subsp. jubararia have been recorded on Alnus, Betula, Cornus,Populus, Ribes, Prunus subcordata, Salix, Picea glauca, Picea engelmanni, Pseudotsuga menziesii and Thuja.