REVISION OF THE JAPANESE TERMITES. 



117 



than the preceding joint. — (Text-fig. 28, b). 



Labium. — Nearly as broad as long, subquadrate, truncate in 

 front, rounded at the lateral corners, and almost straight on sides. 

 The band- shaped chitinized portions are coloured yellow. The surface 

 with several long and short bristles. — (Text-fig. 28, c). 



Ante-clypeus. — Very short, whitish in colour, but partly 

 chitinized. 



Post-clypeus. — Shorter than half of its breadth. Slightly concave 

 in front, and convex behind. Median suture distinct. 



Text-fig. 28. Odontotermes (Cyclotermes) formosanus. Worker, a, Head; b, Antenna; 

 c, Labrum ; d, Right mandible; e, Left mandible; f, Pronotum. (a, f x20 ; b— ex 33). 



Mandibles. — The right with 4 teeth : 1st and 2nd teeth pointed ; 

 3rd not so pointed as the preceding ; basal one flat, with several 

 small parallel ridges. — (Text-fig. 28, d). The left also 4-toothed ; first 

 two large, 3rd small with tip directed posteriorly. — (Text-fig. 28, e). 



Pronotum, mesonotum and metanotum. — Hairy, almost similar in 

 form to those of the soldier, but somewhat smaller. — (Text-fig. 28, f). 



Legs. — Lightly clothed with short hairs. Long and very 



