A key to adults of all heteropteran families known to occur in Illinois is presented together with general information on the biologies of these families. Also included are general references on Heteroptera and on individual families, particularly if those references involve studies of fauna that were conducted in Illinois, adjacent states, or nearby parts of Canada.
McPherson, J. E.
"An Overview of the Heteroptera of Illinois,"
The Great Lakes Entomologist, vol 22
Available at: https://scholar.valpo.edu/tgle/vol22/iss4/1