Formica incisa Smith 1858

Female. Length 4 lines.-Shining black: head elongate with the sides parallel, the vertex deeply notched; the anterior margin of the face ferruginous, the mandibles armed with five or six sharp teeth, the flagellum nigro-piceous. Thorax oblong-ovate; wings fusco-hyaline, the nervures black, the tarsi and knees ferruginous. Abdomen oblong-ovate, the margins of the segments narrowly testaceous; the scale incrassate, compressed, with the margin entire.

Hab. Mexico.