REVISION OF THE JAPANESE TERMITES. 19 



increasing a little in size and then becoming more slender toward 

 the extremity ; the last one somewhat smaller, oval. 



Labrum. — A little broader than long, broadest at the middle, 

 anterior margin nearly straight, antero-lateral corners rounded, 

 lateral margins convex, postero- lateral margins slightly concave. 

 Near the anterior margin, with a row of bristles. — (Text-fig. 2, b). 



Ante-clypens. — Nearly thrice as broad as long, broadest at 

 the base and narrow in front. 



Post-clypens. — Nearly as long as the ante-clypeus and longest 

 at the centre. It is hardly distinguishable from the forehead. 



Eyes. — Small, oval, dark brown; very finely facetted, slightly 

 projecting, almost contiguous to the antennal ridges. 



Mandibles. — The right mandible 5 -toothed : 1st tooth with 

 the tip acute ; 2nd smallest ; 3rd subequal to 1st in size ; 4th 

 broad ; basal (5th) tooth flat, with fine parallel ridges. — (Text-fig. 

 2, c). The left mandible also 5 -toothed : the two foremost teeth 

 almost of equal size ; 3rd a little broader ; 4th directed posteriorly ; 

 basal (5th) one consists of two parts, pointed and flattened, the 

 latter with edge, finely serrate. — (Text-fig. 2, d). 



Pronotum. — Narrower than the head, semilunar, anterior margin 

 a little raised, almost straight, obscurely emarginate in the middle, 

 antero-lateral corners rounded, posterior margin narrow and slightly 

 concave at the centre. Median suture not very distinct. The 

 surface with a few short hairs. — (Text-fig. 2, e). 



Mesonotum. — Almost equal to the pronotum in length and 

 breadth, concave in front, convex behind and converging anteriorly 

 on sides. 



Metanotum. — Shaped as the mesonotum, but shorter and 

 broader. 



Legs. — The tibia covered with hairs, with stout lateral and 



