6. Formica mistura.

F. nigro-picea, ferrugineo variegata, pubescens; capite opaco, thorace abdomineque nitidis.

Female. Length 7 lines. Head black, the vertex and cheeks more or less ferruginous; the head opake, with the mandibles shining nigropiceous; the scape attenuated, rufo-testaceous; the clypeus delicately punctured, slightly emarginate in front. Thorax elongate-ovate, smooth and shining, with ferruginous stains in front and on the sides; the metathorax truncate, with ferruginous spots at its base above; the legs ferruginous, the tibiae and basal joint of the tarsi darkest; the wings flavo-hyaline, the nervures pale rufo-testaceous. Abdomen elongate-ovate, with the margins of the segments and the apex rufopiceous; the scale ferruginous, with its superior margin very slightly emarginate; the head with a thin fulvous pubescence; the abdomen with a few scattered pale hairs.

Hab. Borneo (Sarawak).