Formica laevigata

Smith, F., 1858, Catalogue of the hymenopterous insects in the collection of the British Museum. Part VI. Formicidae., London: British Museum : 55

197. Formica laevigata , B.M.

Female. Length 7 lines.-Black, smooth and shining; closely resembling F. herculanea, but differing in the form of the head, which is rather larger, and, viewed in front, much more square, the sides being parallel, not narrowest at the mouth; the head emarginate, wider than the thorax; the apex of the antennae obscurely rufo-piceous. Thorax oblong-ovate; the tips of the joints of the legs and the apical joints of the tarsi ferruginous. Abdomen ovate, the scale ovate, the margin entire.

Worker. Length 5 lines.-Black: head of the same form as in the female, much wider than the thorax, the latter compressed behind; the legs nigro-piceous, the apical joints of the tarsi ferruginous. Abdomen ovate, the scale ovate, the margin entire; the apical margins of the segments testaceous.

Hab. California.