126. Formica agilis ^HNS. B.M.

Worker. Length 5 lines.-Head and abdomen black; antenna, thorax and legs ferruginous. Head oblong, rounded behind; eyes ovate aud prominent, placed backwards on the sides of the head; the clypeus with a central longitudinal carina, its anterior margin, as well as that of the mandibles, ferruginous; the mandibles large, stout, triangular, and furnished with seven acute teeth within; antennae long and slender. Thorax elongate, narrow, and forming anteriorly a short neck; the posterior portion compressed, the metathorax rounded behind; legs elongate and slender. Abdomen ovate; the scale incrassate and nodose; the abdomen thinly sprinkled with long pale pubescence; the head and thorax, legs and antennae; thinly covered with short pale pubescence.

Hab . New Holland.