Forelius instabilis Santschi, 1920 junior synonym of current valid taxon Forelius breviscapus Forel, 1914
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: Shattuck, 1994: 94, cites 22 worker, 2 queen, 4 male syntypes.
Obsolete combinations