Sp. 7. Pseudomyrma nigriceps .

Worker. - Length lines. Head black: the antennae, mandibles, and the anterior margin of the face, rufo-testaceous; the thorax, abdomen and legs pale rufo-testaceous: the first node of the abdomen subtriangular, the upper margin being curved, the curve channelled from the base to the apex, the latter emarginate; the second node globose; the sides of the abdomen compressed, but not strangulated in the middle.

This species was captured by Mr. Bates, at Santarem, Brazil; it was found coursing over herbage, and also on sandy banks. In mv own Collection.

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