BY G. F, HILL. 87 



rounded in front to the base of the jaws; forehead raised on the 

 summit, sloping down to the clypeus. Clypeus large, arcuate, 

 behind, truncate in front, with a dark spot at either end. Labrum 

 large, straight on the sides for one-half its length, then sloping 

 to the bluntly pointed apex. Jaws long, slender, falcate, basal 

 three-fourths of the cutting edge finely serrated. Antennae 

 13-jointed, springing from circular clefts on the side of the head; 

 1st joint long, stout, slightly curved, swollen towards the apex; 

 2nd less than half the length, globose; 4th- 1 1th moniliform; 1 2th 

 longer; 13th elongate-oval; first three joints with few hairs, the 

 rest moderately hairy. Prothorax small, not as wide as head, 

 wider than long, anterior half bent upwards, front margin arcuate 

 and slightly indented in the middle, sides convex and sloping to 

 the deeply indented hind margin. Abdomen small, not as large 

 as head; cerci small, cone-shaped, hairy; femora moderately stout; 

 tibia slender, flattened; claws and spines small; fourth tarsal 

 joint hairy towards the apex. 



Worker. — Head pale ochreous; antennae, thorax, and legs paler; 

 rest of insect whitish. Length, 3 mm. Head moderately large, 

 longer than broad, broadest behind the jaws, rounded behind, 

 convex on the summit, forehead divided from posterior two thirds 

 of the head by an indistinct suture (most noticeable in young 

 specimens), arcuate behind the clypeus. Clypeus large, convex, 

 apical one-fourth separated by a deep suture, basal three-fourths 

 with few hairs, divided in the middle line by a suture, a large 

 ferruginous spot at each end. Labrum large, broad behind, 

 sloping to the truncate apex. Antennae 13-jointed. Prothorax 

 small, wider than long, similar to soldier. Abdomen long, 

 slender, tapered at either end. Cerci small, cone-shaped. Legs 

 as in soldier. 



The type and cotype specimens were taken under a coconut 

 lying on the ground, and in tunnels leading to it. Another 

 small colony was found building a covered passage up the outside 

 of a concrete house-pile in an endeavour to reach 'the floor- joists. 



//a6.— Darwin, Northern Territory, (G. F. Hill, 28/1/U). 

 Types (No. 100) in the Entomologist's Office, Department of Agri- 

 culture, N.T. 



