Formica angusticollis, Jerdon, T. C., 1851

Jerdon, T. C., 1851, A catalogue of the species of ants found in southern India., Madras Journal of Literature and Science 17, pp. 103-127 : 120-121

33. Formica angusticollis , N. S.

Worker 1 / 2 an inch long; head long, oblong, ending posteriorly in a narrow neck; eyes posterior, of moderate size; jaws triangular, strongly toothed; antennae long; thorax low, narrow, uniform; abdominal pedicle conical, high, narrow; abdomen oval; colour dull black, with antennas and legs rufous.

Warrior, 8 - 12 th of an inch long; head very large, notched posteriorly: eyes much smaller; otherwise similar.

I have only found this Ant in forests in Malabar and always singly.