Genus
Ellychnia (Diurnal fireflies)
Ellychnia californica. Photo: (c) u_phantasticus, some rights reserved (CC BY-NC)
Ellychnia is a genus of fireflies. First defined by Émile Blanchard in 1845, the genus contains 12 species, which are widespread in the United States. Adults are black, with rose-colored marks on the pronotum; sexual dimorphism is unknown. These beetles are active during the day, and have no light-producing organs as adults; instead, they attract mates using chemical signals. The larvae of Ellychnia fireflies live in rotting logs.
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