A list of the 20 species and subspecies of Pachybrachis contained in the collections of the Illinois Natural History Survey and Southern Illinois University, and the author's personal collection, is presented, with recorded ecological data and county distribution records where known.
Barney, Robert J.
"Records of Pachybrachis in Illinois (Coleoptera: Chrysomelidae),"
The Great Lakes Entomologist: Vol. 17
, Article 5.
Available at: http://scholar.valpo.edu/tgle/vol17/iss3/5