Sp. 3. Eciton curvidentata .

Formica curvidentata, Latr . Hist. Nat. des Fourm., p. 269, tab. 8, fig. 55.

Worker.-3| lines. Reddish yellow; the head paler than the other parts; the flagellum fusco-ferruginous, the scape ferruginous and inserted in a fossulet, the edges of which are raised in front, and recurved round the base of each scapus; the mandibles dark brown; short, stout and broadly expanded, the inner edge finely denticulate: head wider than the thorax, narrowed behind, the posterior angles having each a short bent spine. Thorax: an obtuse tubercle on each side at the base of the metathorax; the first node of the abdomen having at its base beneath a small tooth on each side; the second node has a tooth at its base beneath, pointing forwards. Abdomen ovate, and pointed at the apex: the entire insect thinly sprinkled with pale hairs.

This is probably a smaller form of the worker, either of E. hamata or vagans: it appears to be equally abundant with both those species.