Formica irritans Smith, 1857a: 55, 58 (w.) WEST MALAYSIA, BORNEO (East Malaysia: Sarawak). Indomalaya.

Primary type information: Primary type material: syntype major and minor workers (numbers not stated). Primary type localities: 1 worker Malaysia: Malacca, “MAL 19” (A.R. Wallace), 2 workers Malacca, “34 MALAC” (A.R. Wallace), 1 worker Malaysia: Sarawak, “SAR 1” (A.R. Wallace). Primary type depositories: BMNH, OXUM. Type notes: 1) This species is described a second time on p. 58 of the same publication, based on the same material. 2) Donisthorpe, 1932c: 444, cites only 1 minor worker. 3) The single worker labelled “SAR. 1” is probably the one mentioned from “Borneo (Sarawak)" in the original description. I have placed this specimen with the syntypes (Bolton (unpublished notes) 1978).