The Collaborative International Dictionary of English v.0.48:

Lampyridae \Lampyridae\ prop. n.
   A natural family of insects comprising the fireflies.

   Syn: family Lampyridae.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Lampyridae
    n 1: fireflies [syn: Lampyridae, family Lampyridae]