Ellychnia lacustris

Ellychnia lacustris is a species of firefly in the family Lampyridae, originally described by LeConte in 1852. The species is currently treated as a synonym of Photinus lacustris in modern taxonomic databases. Like other members of the genus Ellychnia, this species belongs to the group commonly known as "dark fireflies"—species that lack the bioluminescent organs characteristic of many lampyrids. The species has been recorded from North America.