156 



BIOLOGY OF NORTH AUSTRALIAN TERMITES, 



Abdomen small, widest iu the middle, jjointed towards the apex, with scanty 

 pale long setae. 



Measurements : 



Total leng-th 4.25 mm. 



Head: with jaws, long 2.35; from base to apex of labrum 1.88; wide 1.22 — 

 1.36; deep 0.89. 



Antennae (15-jointed) long 1.88. 



Pronotum: long .37; wide .70. 



Tibia iii., long 1.22. 



Abdomen, wide 1.17. 



Text-figs. 28-33. Hamitermes darwini, n.sp. 



28-,31. Soldier.— 28. Head in profile; 29. Head, dorsal surface; 30. 



proximal seginents; 31. Antenna, distal segments. 

 32-33. Worker.— 32. Head; 33. Mandibles. 



Text-figs. 34-35. Hamitermes meridionalis Froggatt. 

 Soldier. — 34. Head in profile (to same scale as fig. 28); 3. 

 proximal segments (same scale as fig. 30). 



W ork, 



(Text-figs. 32, 33.) 



Colour : Head j'ellow ochre, suffused with oehraeeous orange on sides ; elypeus 

 and labrum yeUow ochre; frons cream; remainder of insect buff yellow. 



Head. (Text-fig. 32) small, semicircular behind, widening slightly on the 

 sides to the base of the mandibles, antennal fossae wide and shallow, foviolae 

 much closer to the postero-lateral angle of the clypeus than to the lateral margin 

 of the head, the surface with very few, moderately long, reddish setae. Post- 

 clypeus large, half as long as wide, convex, broadly rounded behind, truncate in 

 front, with a distinct suture. Labrum short and wide, rounded in front. An- 

 tennae 15-jointed, third joint shortest. Mandibles as in Text-fig. 33. 



Pronotum as in soldier, but without notch in anterior margin. 



Legs short and stout, femora and fore-tibiae thickened, long stout setae on 

 the posterior margin of the apical one-third of tibiae; tibial spurs 3:2:2. 



