Ectatomma brunnea

Smith, F., 1858, Catalogue of the hymenopterous insects in the collection of the British Museum. Part VI. Formicidae., London: British Museum : 103

2. Ectatomma brunnea . B.M.

Female. Length 5 lines.-Deep red-brown: finely striated and somewhat shining; the striation on the head, mandibles and mesothorax, longitudinal, that on the prothorax, metathorax and node of the peduncle, transverse; the basal segment of the abdomen has a very fine curved striation as well as the second segment, on the latter it is very delicate; the apical margins of two or three of the apical segments, as well as the apex itself, bright shining rufo-testaceous; the node of the abdomen incrassate, rounded and blunt at the apex; the insect with short, scattered, pale glittering hairs; the wings flavo-hyaline, the nervures pale testaceous; the metathorax has two short teeth.

Worker.-Rather smaller than the female, of the same colour and similarly striated; the thorax anteriorly produced into a short sharp angular tooth on each side; the metathorax has also two short acute teeth; the thorax is narrower and more elongate than in the female, and the apical joints of the tarsi are pale testaceous.

Hab. Brazil (Santarem).

This species, independent of its darker colour, is differently and much more finely sculptured and striated than tuberculata ; the specimens of the latter have the head very coarsely grooved or striated, the grooves with many transverse reticulations, the posterior angles of the vertex acute; in E. brunnea they are rounded.