159. Formica conspicua ^HNS. B.M.

Female. Length 5-5 1/2 lines.-Chestnut-red: the head about the same width as the thorax, slightly excavated behind; the clypeus subcarinate in the middle, its anterior margin slightly but widely emarginate; mandibles strong, punctured, and armed with four or five teeth. Thorax ovate; wings subhyaline, the nervures pale testaceous. Abdomen ovate; the apical margins of the segments of a darker hue; the scale of the peduncle wide, ovate, with the margin entire.

Hab. Jamaica.