71. Formica ^HNS Bacchus. B.M.

Worker. Length 4 1/2 lines.-Black: the flagellum, thorax, legs and scale of the peduncle rufo-testaceous; the tibiae and basal joint of the tarsi more or less dusky; head large and cordate; eyes ovate, placed above the middle at the sides of the head; the head opake; the clypeus subcarinate in the middle and shining, as well as the mandibles, the latter armed with six stout teeth; the extreme base of the scape pale testaceous. Thorax much narrower than the head, rounded anteriorly and compressed behind. Abdomen: the scale incrassate, narrowed to a thin edge at its upper margin, which is rounded; the scale is narrow, rounded in front and straight behind; the abdomen oblong-ovate; the head, thorax and abdomen have a few scattered, long, erect pale hairs.

Hab. Ceylon.