Photuris mysticalampas sp. nov., is described herein. This species can be distinguished from other Photurids by the combination of its small size, oval body shape, the dense pubescent appearance of the elytra, and flash pattern. Adults emerge at night from Sphagnum spp. hummocks in acidic peatland floodplain forests and fly slowly among dense understory vegetation at <2m height. Typical flash pattern is a slow signal (0.4 – 0.8 sec) of moderate luminosity for a Photuris repeated at 3 – 7 sec intervals. The species is known only from three sites in two watersheds in Sussex County, Delaware.