15. Polyrhachis amanus ^HNS.

P. niger, laevis, nitidus; thorace antice et postice spinis duabus longis acutis armato; squama spinis duabus longis curvatis; femoribus basi pallide ferrugineis.

Worker. Length 3 lines. Jet black, smooth and shining, the thorax finely roughened and sub-opake; head very prominent in front, tips of the mandibles and of the joints of the flagellum, as well as the palpi, rufo-testaceous, five or six of the apical joints of the flagellum entirely so. Thorax, the spines in front short, stout, acute, and curved inwards; those on the metathorax elongate, extending over the base of the abdomen and very acute; the spines on the node of the peduncle slender, very acute, and curved to the shape of the base of the abdomen; legs elongate, obscurely ferruginous, with the coxae, trochanters, arid base of the femora pale testaceous, the claws of the tarsi testaceous. Abdomen globose, highly polished and impunctate. (Pl. I. fig. 13.)

Hab. Celebes (Tondano).