The Bisected Honeylocust Moth has a wingspan of 2-3 inches (53-75 mm). This large moth is yellow with a diagonal postmedian line extending from the inner margin to the apex. The antemedian line curves in near the costa. It lacks white reniform dots which differentiates it from the very similar Honey Locust Moth. The hindwing is orange with a rosy flush along the inner margin. The young gregarious caterpillars are pale green with 4 pairs of black thoracic filaments and a black horn at the end of the abdomen. They also have a white lateral stripe. The older solitary larvae are grass green with 2 pairs of red horns on the thorax and one on the end of the abdomen. There are several silvered horns across the abdomen. The last instar has a red and white supraspiracular stripe. The body is dotted with white spots.