Genus 4. POLYERGUS ^HNS. Pl. IV. figs. 1-9.

Formica ^HNS, pt., Latr. Hist. Nat. Fourm. p. 186 (1802).

Polyergus ^HNS, Latr. Hist. Nat. Ins. et Crust. xiii. 256 (1805).

The maxillary palpi 4-jointed, the labial palpi 2-jointed. Mandibles slender and curved, acute at the apex, not dentate within.