Oh damn. I'll get the list for Formica then
I used the same strategy for identifying my ants:
Formica argentea
Formica aserva
Formica dakotensis
Formica dolosa
Formica exsectoides
Formica ferocula
Formica fusca
Formica glacialis
Formica gynocrates
Formica incerta
Formica indianensis
Formica integra
Formica lasioides
Formica montana
Formica neogagates
Formica obscuripes
Formica obscuriventris
Formica pallidefulva
Formica pergandei
Formica postoculata
Formica puberula
Formica querquetulana
Formica rubicunda
Formica subaenescens
Formica subintegra
Formica subsericea
Formica ulkei
Formica vinculans
Sorry if it's spammy. You can use antmaps.org to find others if needed but those are the Formica for Indiana.