Brood XXI (13-year)
The Floridian Brood
Brood XXI was last recorded in 1870.
This map is intended to portray only an approximate, present-day brood distribution. It is based on previously published maps (Marlatt 1923). A project is currently underway to make new maps of periodical cicada broods. See the Magicicada mapping project homepage.
Marlatt, C. 1923. The Periodical Cicada. United States Department of Agriculture, Bureau of Entomology Bulletin 71.
Simon, C. 1988. Evolution of 13- and 17-year periodical cicadas. Bulletin of the Entomological Society of America 34:163-176.