REVISION OF THE JAPANESE TERMITES. 



23 



Ocelli. — Large, round, almost contiguous to the inner margin 

 of the eyes. 



Labrum. — Trapezoidal, with the base narrow, broader than long, 

 anterior margin 

 nearly straight, 

 antero- lateral cor- 

 ners broadly 

 rounded. The 

 anterior border 

 white, fringed with 

 several (about 

 eight) long bristles ; 

 upper surface con- 

 vex, with a few 

 scattered hairs. — 

 (Text-fig. 3, c). 



Ante- clypeus. 

 — Trapezoidal, 

 broad behind, 



more than twice 

 as broad as long, 

 anterior margin 

 concave and the 

 posterior slightly 

 concave. 



Text-fig. 3. Calotermes (Neotermes) koshunensis. Imago, 

 a. Head ; b, Antenna ; c, Labrum ; d, Eight mandible ; e, Left 

 mandible ; f , Pronotum ; g, Fore wing ; h, Hind wing ; i, Leg. 

 (a, fxl3; b— e, ix20; g, hx6.5). 



Post -clypeus. — Nearly as long as the ante -clypeus, anterior 

 margin almost straight and posterior margin straight with a few 

 hairs directed forwards. 



Mandibles. — The right mandible 4 -toothed : 1st tooth with tip 

 a little incurved ; 2nd triangular ; 3rd broad ; basal (4th) tooth 



