6. Myrmica carinata.

M, obscure fusco-ferruginea; thorace rufofulvo; capite thoraceque carinis irregularibus; metathorace spinis duabus longis armato.

Worker. Length 1 1 / 4 lines. Head and abdomen black, with more or less of an obscure ferruginous tinge, particularly at the vertex and base of the abdomen; the thorax and nodes of the petiole ferruginous; the legs rufo-piceous, with the tarsi and articulations ferruginous, the antennae and mandibles ferruginous; the head and thorax with irregular distant longitudinal carinae; the sides of the thorax rugose; the spines on the metathorax long and acute; the abdomen very smooth and shining; the club of the antennae 3 - jointed.

Bai. Aru.