Tetracis jubararia

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.

Subspecies

 * Tetracis jubararia jubararia (southern California northward to British Columbia and eastward to central Saskatchewan, southwestern Idaho, and White Pine County, Nevada at elevations from 150 to 2255 meters)
 * Tetracis jubararia sericeata (Rocky Mountain and Intermountain Regions from 1,830 to 2,590 meters)