If you’re researching Cicadas in the Neotropic ecozone, which is Central and South America, here are some resources that will help you:
1) Follow Andreas Kay’s Flickr feed. He posts many excellent cicada photos from Ecuador. Many cicadas found in Ecuador are not endemic, so the cicadas you see in Andreas’ Flickr feed should be found in adjacent countries.
2) Visit Cigarras do Brasil – Brazilian Cicadas for photos and information about the cicadas of Brazil.
3) Read: Jacobi (1907) “Homoptera Andina”. (Not sure where to find it – maybe ebay).
4) Read: Insecta. Rhynchota. Hemiptera-Homoptera. Volume I (1881-1905) by W. L. Distant and W. W. Fowler. It is available online. Here is a sample from that book:
6) Use ITIS to traverse cicada species names and get listings of papers about the cicada — then search for the cicada names and papers.
Thanks again to David Emery!