146 



W. A. SANDS 



Measurements (two specimens from two localities) in millimetres: 



Head width (W) ...... 0-73-0-76 



Fore tibia width (T w ) ..... 010-011 



Fore tibia length (Ti) ..... 0-53-0-56 



Postclypeus length (Pel) . . . . 0-25 



Left mandible, apical to first marginal (La) • 009 



Left mandible, first to third marginal (Li) . o-n 



Left mandible, third marginal to molar (L m ) . 0-04 



Right mandible, apical to first marginal (Ra) . 0-09 



Right mandible, first to second marginal (Ri) . 0-09 



Right mandible, second marginal to molar (R m ) 0-04 



A. epius has already been compared with A. chirotus in the discussion on that 

 species. It is about the same size as A. tithasus, but has a much more inflated 

 postclypeus in both imago and worker castes, and the ocelli are closer to the com- 

 pound eyes. A. epius is the only species of the genus which in the worker has a 

 mesenteric overlap with the proctodeum, and a vestigial third apical spur on the 

 slender fore tibia. There is a little doubt about this character in the imago, since 

 although the third spur is vestigial in the type-series, it is fully developed in another 



344 



345 



346 



347 



Figs 340-347. Acholotermes, imago head capsules, front and side views. 340, 341, 

 A. chirotus; 342, 343, A. epius; 344, 345, A. imbellis; 346, 347, A. tithasus. 



