164 NORTHERN TERRITORY TERMITlDjE, {., 



Termitophilous insects, other than Mastotermes dartviniensis, 

 have not been recorded from these nests, noi* are the latter 

 invaded by predaceous ants. 



Hah. — Thirty-four-mile Siding, Northern Territory Kailway 

 (G.F.Hill, 14/11/13); Darwin, Koolpinyah, Stapleton. Types 

 (No. 28) in Entomologist's Office, Department of Agriculture, N.T. 



EUTERMES LONGIPENNIS, nOV.sp. 



Winged form. — Upper surface of head castaneous; mouth-parts 

 ochreous; antennae dark ochreous, the apex of each segment 

 paler; thorax and scapular shields ferruginous; dorsal plates of 

 abdomen dark brown, ventral plates with a light brown spot at 

 each end; the rest of insect ochreous. Length, to tip of wings, 

 20 mm.; to tip of body, 10 mm. Head very hairy, rounded 

 behind, broadest across the eyes, sloping in to the base of the 

 clypeus, flattened on the summit, and divided by an obscure 

 median suture, which merges into a forked cleft in line with the 

 centre of the eyes ; eyes moderately large, projecting, finely 

 faceted; ocelli oval, adjacent to the inner margin of the eyes. 

 Antennae 16-jointed, stout, hairy, springing from a circular cleft 

 in front of the eyes; 1st joint long, slightly turbinate; 2nd less 

 than one-half the length, and slightly swollen at the apex; 3rd 

 about the same length as the 2nd, stalked; 4th very short, more 

 rounded; 5th-7th larger, rounded; 8th-15th elongate, stalked, 

 swollen towards the apex; 16th shorter, elongate-oval. Clypeus 

 moderately large, hairy, slightly arcuate behind, lobed in front, 

 apex paler in colour, and bluntly pointed. Labrum narrow at 

 the base, swelling out on the sides, rounded in front, covering 

 the tips of the jaws. Jaws large, right mandible with two, siiarp, 

 stout, angular teeth at the apex, followed by a much shorter and 

 blunted one, and a large, serrated basal tooth; left mandible 

 with two, sharp, apical teeth, the hindermost connected with a 

 third and smaller one by a long cutting Qdge; at the base of the 

 jaw, a large, irregular, blunt tooth opposed to the serrated tooth 

 on the right. Prothorax hairy, broad, not as wide as head, 

 middle of front margin bent-up, sides sloping round to the hind 

 margin, which is nearly straight, a deep depression behind the 



