Formica dryas Wheeler, 1905 junior synonym of current valid taxon Formica obscuriventris Mayr, 1870
Formica dryas Wheeler, 1905d: 268 (w.q.) U.S.A. (Wisconsin, Illinois). Nearctic.
Primary type information: Primary type material: syntype workers (number not stated, “numerous”), 3 syntype queens. Primary type localities: U.S.A.: Wisconsin, Milwaukee (W.M. Wheeler), U.S.A.: Illinois, Rockford (W.M. Wheeler). Primary type depository: MCZC.
Citations

Extant: 0 valid subspecies (1 synonym)