Ectatomma concinna

Smith, F., 1858, Catalogue of the hymenopterous insects in the collection of the British Museum. Part VI. Formicidae., London: British Museum : 103-104

3. Ectatomma concinna . B.M.

Female. Length 6 lines.-Chestnut-brown: delicately and evenly striated; the striation on the head, mesothorax, scutellum, node of the peduncle and second segment of the abdomen is longitudinal, that on the prothorax is obliquely curved; on the metathorax and basal segment of the abdomen it is transversely curved; the clypeus truncate in front, with the lateral angles emarginate; the mandibles bent, smooth and shining, their inner edge only touching towards their apex, and being finely denticulate; the eyes less prominent than in tuberculata or brunnea ; the wings subhyaline, the nervures rufo-testaceous, and covered with a fine downy pubescence; the node of the peduncle subglobose, and produced behind into an obtuse tooth or tubercle; beneath, it is pinched into a sharp longitudinal edge, with a tooth at the base and another about the middle.

Hab. Brazil (Santarem). (Coll. H. W. Bates.)

This species resembles the two preceding, but is readily distinguished by the fineness of the striation, and by not having any angles or teeth on the head and thorax; the pubescent wings are a strong distinctive character.