n. The common English name of Lampyris noctiluca, a species of pentamerous beetles, of the family Lampyridæ and subfamily Lampyrinæ: a name applicable strictly only to the female, which is wingless, somewhat resembles a caterpillar, and emits a shining green light from the end of the abdomen. The male is winged and not phosphorescent, resembling an ordiuary beetle; he flies about in the evening, and is attracted by the light of the female. The same name is given to other species of Lampyris, as L. splendidula. Some related beetles are known in the United States as fireflies and lightning-bugs.