REVISION OF THE JAPANESE TERMITES. 



49 



broad ; 2nd much shorter and narrower ; 3rd smallest, narrow at 

 the base and broad at the distal end ; the rest turbinate, gradually 

 increasing in size toward the extremity ; 11th oval, narrower than 

 the preceding joint. — (Text-fig. 10, b). 



Eyes. — Rudimental, represented by a small round spot on each 

 side of the head, just behind the antennal cleft. 



Labrum. — Subquadrate, nearly as long as broad. Anterior 

 margin obscurely concave, antero- 

 lateral corners strongly rounded. 

 Anterior border with several 

 bristles. — (Text-fig. 10, c). 



Ante-clypeus. — Short, trape- 

 zoidal, almost straight in front, 

 converging anteriorly on sides and 

 obscurely distinguished from post- 

 clypeus behind. 



Post-clypeus. — Hardly dis- 

 tinguishable from the same colour- 

 ed forehead. Along the anterior 

 border there is a row of several 

 short hairs. 



Mandibles. — The right 4- 

 toothed : 1st tooth very stout, tip 

 sharp and incurved ; 2nd small, with tip directed transversely ; 

 3rd flat ; the basal tooth large, flat, with edge finely serrate. The 

 left has 6 teeth : 1st tooth very large with tip acute and incurved ; 

 2nd and 3rd subequal in form and size ; 4th broad ; 5th almost 

 obscure; 6th large with irregular convex edge. — (Text-fig. 10, 

 d, e)- 



Pronotum. — Slightly broader than the head, nearly twice as 



Text-fig. lO. Calotermes (Gtypto- 

 termes) fuscus. Soldier, a, Head; b, An- 

 tenna ; c, Labrum ; d, Eight mandible ; 

 e, Left mandible ; f , Pronotum. (a, f x 20 ; 

 b, ex 33). 



