108. Formica laboriosa ^HNS. B.M,

Female. Length 5 lines.-Jet-black, smooth and shining; head oblong, a little wider than the thorax, slightly narrowed anteriorly; the flagellum obscurely rufo-testaceous; the anterior margin of the clypeus entire; the mandibles obscurely ferruginous. Thorax ovate; wings hyaline, the nervures pale rufotestaceous. Abdomen ovate; the scale of the peduncle subovate, the superior margin rounded.

Hab. Sierra Leone. (Coll. Rev. D. F. Morgan.)

This is probably the female of F. vivida ^HNS.