REVISION OF THE JAPANESE TERMITES. 



87 



diminising in breadth toward the extremity of the antenna ; 19th 

 elongate-oval.— (Text-fig. 20, b). 



Eyes. — Circular, not very large, slightly projecting on sides, 

 obscurely facetted and pigmented pale purple. 



Text-f i g. 20. Arrhinotermes japonicus. Ergatoid. a, Head ; b, Antenna ; 

 c, Labrum ; d, Right mandible ; e, Left mandible ; f, Pronotum ; g, Terminal 

 abdominal ; segments of male from below ; h, The same of female, (a, f — h 

 x20; b— ex50). 



Ocelli. — Very small, in front of the eyes, separated by less 

 than two diameters. 



Labrum. — Broader than long, narrow at the base, swelling out 

 in middle and rounded in front. Anterior border white, surface 

 with several bristles. — (Text-fig. 20, c). 



Ante-clypeus. — Very short, trapezoidal, with rounded antero- 

 lateral corners. 



