Females are flightless. Males: wings variable in coloration: whitish gray, brown, or greenish, without much brown or black shading.
The PM line is outwardly dentate, but nearly straight near the inner margin, whearas in P. denticulata, the PM line is makes a deep U-shaped bend. Compare these two species carefully. P. strigataria often has two smoothed-looking areas on the FW, where the lines are softened or absent, and the background is less mottled. Additionally, a dark spot is often formed where the PM line joins or comes close to the median line.
Distribution pattern: Eastern.
Reilly pers obs
These moths emerge in late winter, one of the earliest moths of the year.
Rindge FH. 1975. A revision of the new world Bistonini (Lepidoptera Geometridae). Bulletin of the American Museum of Natural History 156(2): 71-155.
McGuffin WC. 1977. Guide to the Geometridae of Canada (Lepidoptera) II. Subfamily Ennominae. 2. Memoirs of the Entomological Society of Canada 101: 1-125.
Covell CV. 1984. A field guide to the moths of Eastern North America. Houghton Mifflin Company: Boston. 496 pp.