75. Formica irritans ^HNS. B.M.

Worker. Length 2 1/2 - 6 lines.-Head and abdomen nigrofuscous; antennae, thorax, abdomen, scale of the peduncle and the legs ferruginous. Elongate and slender; head ovate; the scape black, with the apex ferruginous. Thorax elongate, compressed, the prothorax slightly dilated at the sides; the scale of the peduncle incrassate, rounded in front and truncate behind. Abdomen ovate; the entire insect sprinkled with erect pale hairs.

Worker minor, length 3 lines; the antennae entirely ferruginous.

Hab. Malacca.