Northern Prairie Wildlife Research Center
Wingspan 3.8 cm. Forewing is mottled gray with a large white, slipper-shaped stigma; hindwing is pale yellow-brown with a broad black submarginal border. This noctuid is common and widely distributed. Moths fly in midsummer. Caterpillars feed on the foliage of species of Pinaceae.
Similar species: Syngrapha viridisigma is larger, lacks the white stigma, uncommon and occurs in high elevation forests in western North America, caterpillars feed on the foliage of species of Pinaceae; Syngrapha angulidens has a white comma-shaped stigma, common in high elevation conifer forests of the Rocky Mountains, caterpillars feed on the foliage of Engelmann spruce (Picea englemannii) and subalpine fir (Abies lasiocarpa); Autographa californica forewing with a comma-shaped stigma and a pale gray subapical streak.