96 NORTHERN TERRITORY TSBMITID^^, i., 



white. Length, 5 mm. Head rounded behind; forehead con- 

 cave; eyes circular, projecting from the sides of the head, finely 

 faceted; ocelli round, in line with the front margin of the eyes; 

 clypeus large, convex, arcuate behind, rounded on the side, 

 divided longitudinally by a suture which extends across the con- 

 cave forehead, front margin rounded, depressed, divided from 

 the posterior portion by a deep lateral suture. Labrum large, 

 projecting beyond the jaws, broadest behind, narrowing to the 

 bluntly pointed apex. Antennae hairy, 15-jointed, short, slender, 

 springing from a circular cleft in front of the eyes; 1st joint long, 

 slightly turbinate; 2nd one-half the length of first, cylindrical; 

 3rd very small; 4th to 10th larger, coalesced; 11th, 12th, 13th 

 increasing in size; 14th longer, nearly cylindrical; 15th elongate- 

 oval, slightly stalked, longer than 14th. Prothorax long, nar- 

 rower than head, saddle-shaped, truncate and rigid in front, 

 sides and hind margin rounded; wing-pads rudimentary. Tarsi 

 slender, claws small. Cerci small, cone-shaped. Entire head, 

 thorax, abdomen, and legs covered with fine pale hairs. 



Male (king). — General colour dark brown above; head casta- 

 neous; antennae dark );rown, with the base and apex of each 

 segment whitish; legs and chitinous plates of ventral surface 

 light brown. Length, 3 J mm. Head rounded behind, flattened 

 on the summit, sloping down to the prominent clypeus, with a 

 curious keyhole-like whitish mark in the depressed centre in line 

 with the middle of the eyes. Eyes large, prominent, projecting 

 well beyond the genae. Ocelli large, reniform, adjacent to the 

 inner margin of the eyes. Antennae hairy, 1 5- jointed, springing 

 from circular clefts in front of the eyes; 1st joint long, stout, 

 cylindrical; 2nd one-half as long; 3rd very small; 4th-10th mon- 

 iliform; llth-14th increasing in length; 13th and 14th nearly 

 cylindrical ; 15th largest, elongate-oval. Clypeus paler than 

 head, large, convex, arcuate behind, rounded on the sides; apex 

 whitish, rounded in front, divided from the basal two-thirds by 

 a deep transverse suture. Labrum large, covering the jaws, 

 narrow at the base, swelling out at the sides beyond the middle, 

 and contracting again to the rounded apex. Prothorax long, 

 rugose, narrower than head, truncate and slightly bent in front; 



