4. Polyrhachis sculpturatus ^HNS.

P. capite, thoraee abdommeque delicatule aeiculatis; thoraee spinis duabus elongatis acutis antice armato; abdominis squamula spinis duabus longis acutis, atraque ad basin minute unispinulosa.

Female. Length 43/4 lines. Black, and very finely striated longitudinally; the eyes as well as the front of the head prominent; the mandibles shining and longitudinally striated. Thorax short and very convex above, armed in front with two stout acute spines; the wings fusco-hyaline, the nervures rufo-testaceous, the stigma black. The peduncle of the abdomen with two stout, upright, acute spines; at the base of each, outside, is a short minute spine. The entire insect thinly covered with erect black pubescence, which is most dense on the abdomen; the abdomen has also a thin covering of shorter pale pubescence.

Worker. Length 4 lines. Closely resembling the female, but with the thorax flat above, the lateral margins being slightly notched at the divisions between the pro-, meso- and metathorax; otherwise like the female.

Hab. Makassar.