The large map above was made by combining the records from these two thumbnails. [All Canadian records on the 2019 SINA map are from Vickery and Kevan 1985.]
The Illinois record near Lake Michigan is from a 29 Dec 2014 email from Carl Strang, who reports in his Singing Insects Summary 2014, that both fall and spring field crickets occur in many habitats in DuPage County.