A large (approx. 5 cm, including wings) insect with pectinate antennae. Head and pronotum dark brown with yellow markings. A member of order Megaloptera.
The larvae are aquatic in slow moving or still water. The adults tend to remain near the water but are attracted to lights.
This near-dead individual was found in the upstairs hallway of Cosby High School, apparently swept up with some large dust bunnies. I moved it to a box to get it off the floor and to photograph it (notice that it is covered in dust) and to return it to the nearby woods. It died before I had a chance to return it.