A recent survey of private and institutional collections in Illinois and surrounding states has provided specific information on the occurrences of four species of sphingids within Illinois: Eumorpha fasciata, Hyles gallii, Sphinx franckii, and S. vashti. Geographical and phenological data for these species are provided.
Cashatt, Everett D.; Godfrey, George L.; and Wiker, James R.
"Occurrences of Eumorpha Fasciata, Hyles Gallii, Sphinx Franckii and S. Vashti (Lepidoptera: Sphingidae) in Illinois,"
The Great Lakes Entomologist, vol 23
Available at: https://scholar.valpo.edu/tgle/vol23/iss4/8