Formica gracilis Fabricius, 1804: 405 (w.) GUYANA. Neotropic.

Primary type information: Primary type material: lectotype worker (by designation of Ward, 1989a: 439). Primary type locality: lectotype Guyana: Essequibo (no collector’s name). Primary type depository: ZMUC. Secondary type information: Secondary type material: paralectotype workers (number uncertain). Secondary type locality: same as for lectotype. Secondary type depositories: ZMUC, ZMUK. Type notes: 1) Original locality data: “Habitat in America meridionali. Dom. Smidt. Mus. Dom. Lund”; the Essequibo locality is cited by Ward, 1989a: 439; 2) According to Zimsen, 1964: 425, there are 3 specimens in ZMUC, and 1 in ZMUK, but Ward, 1989a: 439 (in text), says that one ZMUC specimen is not conspecific with the lectotype.