Ectatomma

Smith, F., 1858, Catalogue of the hymenopterous insects in the collection of the British Museum. Part VI. Formicidae., London: British Museum : 102

Genus 6. ECTATOMMA .

Head subquadrate; antennae inserted forwards on the face at the base of the clypeus, 12-jointed in the female, 13-jointed in the male; eyes ovate and very prominent, placed a little behind the middle at the sides of the head; maxillary palpi 2-jointed, labial palpi 2-jointed; mandibles triangular, with one or two minute teeth near their apex. Thorax: wings with one marginal and three submarginal cells, the second submarginal cell receiving the recurrent nervure near its base; legs elongate, the spur which arms the apex of the intermediate and posterior tibiae simple, that at the apex of the anterior pair pectinate within. Abdomen: the node of the peduncle incrassate, a deep strangulation between the first and second segments.