Neduba diabolica is a species of shield-backed katydids in the family Tettigoniidae. It is found in North America.
References
Capinera J.L, Scott R.D., Walker T.J. (2004). Field Guide to Grasshoppers, Katydids, and Crickets of the United States. Cornell University Press. Otte, Daniel (1997). "Tettigonioidea". Orthoptera Species File 7, 373.
Further reading
Arnett, Ross H. (2000). American Insects: A Handbook of the Insects of America North of Mexico. CRC Press.