Forelius maccooki st. instabilis [sic] Santschi, 1920d: 382 (w.q.m.) Note: maccooki is a misspelling of Forelius mccooki. ARGENTINA (Buenos Aires). Neotropic.

Primary type information: Primary type material: syntype workers, syntype queens, syntype males (numbers not stated). Primary type locality: Argentina: La Plata, 15.x.1916 (C. Bruch). Primary type depositories: MHNG, NHMB. Type notes: 1) Baroni Urbani, 1977e: 84, cites 15 worker, 2 queen, 3 male syntypes in NHMB. 2) Shattuck, 1994: 94, cites 22 worker, 2 queen, 4 male syntypes (7w, 1m MHNG, 15w, 2q, 3m NHMB).