Formica rufa subsp. propinqua Creighton, 1940a: 1, 7 (in key) (w.) U.S.A. (California). Nearctic.

Primary type information: Primary type material: syntype workers (number not stated, “numerous”). Primary type localities: U.S.A.: California, Lake Tahoe (W.M. Wheeler) (invalid restriction of type locality by Creighton, 1950a: 490; no lectotype designated), U.S.A.: California, nr Lake Tahoe (Tallac, Glen Alpine Springs, Fallen Leaf Lake, Angora Peak) (W.M. Wheeler). Primary type depositories: AMNH, LACM, MCZC.