The Iowan Brood
17-year Brood III, the Iowan Brood, emerges in Missouri, Iowa and north western Illinois. In many areas, it is in close contact with 13-year Brood XIX.


Stannard (1975) published a map of all Illinois periodical cicada broods. Standard’s map shows an eastern disjunct of Brood III in DeWitt, Piatt, and Champaign Counties. However, these populations occupy a more restricted area and belong to 13-year Brood XXIII.

Literature
Irwin, M. D., and J. R. Coelho. 2000. Distribution of the Iowan Brood of periodical cicadas (Homoptera: Cicadidae: Magicicada spp.) in Illinois. Annals Of The Entomological Society Of America 93:82-89.
Marlatt, C. L. 1923. The Periodical Cicada. United States Department of Agriculture, Bureau of Entomology Bulletin 71:1-183.
Simon, C. 1988. Evolution of 13- and 17-year periodical cicadas. Bulletin of the Entomological Society of America 34:163-176.
Stannard, L. J. 1975. The distribution of periodical cicadas in Illinois. ll. Nat. Hist. Surv. Biol. Notes 91:3-12.