Below are some scientific references to fireflies.
Bugs and Beetles: The New Compact Study Guide and Identifier, by Ken Preston-Mafham. 1997. Chartwell Books. Hardback. Page 49.
Collier's Encyclopedia, 1994, Vol. 9, pages 742-743.
Compton's Encyclopedia, 1994, Vol. 8, page 113.
Encyclopedia Americana, 1994, Vol. 11, pages 258-259.
Encyclopedia Britannica, 1973 Vol. 9, pages 298-299.
A Field Guide to the Beetles of North America by Richard E. White, 1983, pages 188-190
Funk & Wagnalls New Encyclopedia, 1993, Vol 28, page 202
How to Know the Beetles by H.E. Jones, 1951, pages 126-128.
Insects: A Guide to Familiar American Insects by Herbert Zim and Clarence Cottam, 1951, pages 116-117.
The Life of Beetles by Glyn Evans, 1975, pages 60-65.
A Manual of Common Beetles of Eastern North America by Elizabeth and Lawrence Dillon, 1961, pages 248-255.
The New Encyclopedia Britannica, 1993, Vol 4, page 791
Observing Insect Lives, by Donald Stokes. 1983. Little, Brown and Company. Paperback. Pages 163 - 166.