Isn’t this a lovely picture (updated with colors sorted)?
This image represents the combined range of all Magicicada periodical cicada broods, including the extinct Broods XI (last recorded in Connecticut) and XXI (last recorded in Florida).
To produce this image, I visited John Cooley’s Magicicada.org Cicada Geospacial Data Clearinghouse and downloaded the Shapefile of Magicicada broods. Then I used the computer program QGIS to change the Shapefile to a KML file, and then I opened the file in Google Earth. Credit goes to John for pulling the data together into the Shapefile.
I manually edited the KML file to try to give each Brood a different color.
An interesting area is Fredrick County, where 5 different broods seem to exist (or have existed) at once.
Peach = Brood I
Green = Brood II
Purple = Brood V
Cyan = Brood X
Red = Brood XIV
It’s also interesting that four of the broods are separated by four years: X, XIV, I, V.