fire beetle

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of various tropical American click beetles of the genus Pyrophorus, especially P. noctilucus, having bright, luminous spots.

Wiktionary

1. n. A brilliantly luminous beetle, Pyrophorus noctilucus, one of the elaters.

GNU Webster's 1913

1. n. (Zoöl.) See in the Vocabulary.
2. (Zoöl.) A very brilliantly luminous beetle (Pyrophorus noctilucus), one of the elaters, found in Central and South America; -- called also cucujo. The name is also applied to other species. See firefly.

WordNet 3.0

1. n. tropical American click beetle having bright luminous spots