102 NORTHERN TERRITORY TBUMITID^,!., 



Soldier. — Head rusty-brown, base of snout darker, back of 

 head distinctly lighter, rest of insect ochreous-yellow. Length, 

 3 J mm. Head round behind, tapered to the base of the snout, a 

 cluster of fine hairs and bristles on tip of snout; scattered, long, 

 slender, reddish bristles on rest of head. Palpi long, slender, 

 very hairy, reaching tip of snout. Antennae H-jointed, very 

 long and slender, the base of segments 2-6 whitish; 1st segment 

 long, moderately stout, nearly cylindrical, without hairs; 2nd and 

 3rd less than one-half the length, slender; 4th to 10th increasing 

 in length, slightly swollen towards the apex; 11th to 14th de- 

 creasing in length. Prothorax small, not as wide as head, much 

 wider than long, rounded in front and behind, anterior half bent 

 up in the middle, and fringed with a few long hairs. Hind 

 margin of pro-, meso-, and metathorax fringed similarly. Legs 

 very long; femora cylindrical, sharply contracted at the base, 

 with a few fine hairs; tibia long, hairy; spines small; claws long 

 and slender. Abdomen small, covered with scattered hairs; cerci 

 long, slender, with a few long hairs at apex. 



Worker. — Head pale ferruginous above; clypeus, thorax, and 

 legs very pale ochreous; rest of insect whitish. Length, 5 J mm. 

 Head rounded behind, broadest across the middle, arcuate behind 

 the clypeus, a pale median suture joining another which crosses 

 the head well behind the clypeus, a dark ferruginous spot at 

 either end of the clypeus. Clypeus large, convex, divided by a 

 median suture, lobed in front, apex bluntly pointed. Labrum 

 large, narrowest at the base, swelling out on the sides, rounded 

 in front. Jaws short, not as stout as, but otherwise similar to, 

 those of winged forms. Antennae 16-iointed. Legs moderately 

 short and stout; tibial spines small; claws moderately long and 

 slender. Abdomen large, covered with fine scattered hairs; cerci 

 large, hairy. 



The termitaria of £J. pastinator are enveloped in an intensely 

 hard exterior wall, composed of fine particles of earth, sand, and 

 short lengths of grass firmly cemented together. Few exceed 

 2 ft. in height, by 2 ft. 9 in. in diameter at the base, the average 

 being about 1 ft. 6 in. in height, by about 2 ft. in diameter. In 

 shape, they are flattened domes, with or without irregular pro- 



