Pennsylvania Fireflies look similar to Big Dipper Fireflies. An easy way to differentiate them is by examining the elytra (the black wing coverings). Pennsylvania Fireflies have a thin stripe of orange or yellow that stretches from the 'shoulder' down to the bottom of the elytra. The thorax (shoulder plate) is yellow around the edges and has a black mark in the center with two red spots on either side of it.
This species of firefly eats other insects in addition to the males of Photinus. Smaller bugs, snails and worms comprise its diet. This particular species has been named the state insect of Pennsylvania.