classification

Family: Lampyridae

Common Names:

  • Firefly
  • Lightning Bug
  • Glowworm

What are fireflies?

Fireflies are actually beetles!

Fireflies are not really "flies" as entomologists know them, but are beetles in the family Lampyridae. "Flies" have one pair of wings (like houseflies) while all other winged insects have two pairs of wings, or, four wings altogether. In general, when the common names of insects contain the word "fly" as part of a one word common name such as firefly, dragonfly or scorpionfly, the insects are not true flies and belongs to another order of insects. When the word "fly" is hyphenated or follows the first word of an insect common name, it is most likely a true fly (and by definition, has only two wings.)


Most known firefly species are bioluminescent as adults. However, all known firefly larvae are bioluminescent, as are firefly eggs. Thus, the ability to glow as an adult insect is not characteristic of this group of beetles. Also not all bioluminescent beetles are fireflies. Related beetle families that have bioluminescent members include some click beetles (family Elateridae), phengodid beetles (family Phengodidae) and several other very small families.

What's in a name?

When an insect (or any other organism, for that matter) is described by a scientist, it is given its own scientific name. The name is composed of two parts, the first being genus and the second being species. These names are composed of either Greek or Latin roots and commonly describe aspects or features of the organism to which the names are given.

The following are examples of descriptive names given some firefly genera:

Lamprocera - brilliant and wax-colored

Microphotus - small light

Macrolampis - big light

Microdiphot - small paired lights

Pyrogaster - fire stomach

Lampyris - Glowworm

Pyropyga - fire rump/butt

Copyright 1998 Marc Branham. All Rights Reserved.