72. Myrmica tristis ^HNS. B.M.

Worker. Length 1 1/2 line.-Reddish-brown, opake: the eyes small, black and prominent; the flagellum slightly fuscous with the tip pale, the club 3-jointed. Thorax much narrower than the head, deeply strangulated in the middle; the metathorax with two short upright spines; the tibiae and femora slightly dusky in the middle. Abdomen small and ovate; the first node of the petiole conical, the second globose.

Hab. Rio Janeiro (Tejuca). (Coll. Rev. Hamlet Clark.)