5. Myrmica pertinax ^HNS.

M. rufo-fusca, nitida, sparse pilosa; capite longitudinaliter striate; metathorace mutico.

Worker. Length 1 1 / 2 - 2 lines. Rufo-fuscous, the head darker than the the body; the anterior portion of the head and the antennae bright rufo-ferruginous. The thorax smooth and shining, with a few fine punctures, the base and apex of the femora pale in some of the larger and darker examples; the abdomen pale at the base, the ex- treme apex pale and pubescent. Smaller specimens are usually paler than large ones.

Hab. Celebes (Tondano).