57. Ponera aliena ^HNS.

Worker. Length 1 1/2 line.-Scarcely differing from the Ponera contracta ^HNS of Europe; the antennae are however rather shorter, and the apical joint longer; the legs are shorter and thicker; but the most distinctive difference is the thickness of the scale, or node of the petiole, which in the present species is much thicker, particularly at its upper margin; in other respects they scarcely differ: the eyes are wanting, as in P. contracta ^HNS: the palpi have not been examined.

Hab. Brazil. (Coll.W. Swainson.)

This species doubtless resembles very closely the Ponera ruficornis ^HNS of Spinola, but he describes his insect as black, with red antennae: our species is entirely of a brownish-yellow, and appears to he distinct.