Formica difficilis consocians Wheeler, 1904 junior synonym of current valid taxon Formica difficilis Emery, 1893
Formica difficilis var. consocians Wheeler, 1904i: 371 (w.q.m.) U.S.A. (Connecticut). Nearctic.
Primary type information: Primary type material: syntype workers (number not stated, “numerous”), 12 syntype queens, 3 syntype males. Primary type locality: U.S.A.: Connecticut, Litchfield County, Colebrook (W.M. Wheeler). Primary type depository: MCZC.
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