REVISION OF THE JAPANESE TERMITES. 27 



Antennae. — 17-1 9 -jointed. To speak of the specimen with 

 18- joints : 1st joint large, cylindrical ; 2nd much smaller ; 3rd— 5th 

 very short, annulate ; 6th-7th orbiculate ; the rest turbinate ; 18th 

 elongate-oval. 



Eyes. — Not large, slightly projecting and facetted. 



Ocelli. — Obscure. 



Labrum. — Broader than long, the anterior margin nearly 

 straight, antero-lateral corners rounded and the lateral margins 

 slightly converging posteriorly. Near the anterior border, several 

 bristles arranged in one row. 



Mandibles. — Cutting margin toothed ; the right mandible with 

 4 teeth : two apical teeth pointed, 3rd broad, and 4th flat. The 

 left 4-toothed ; the basal tooth with the edge broadly convex. 



Pronotum. — Large, broader than the head ; concave in front, 

 rounded on the sides and almost truncate behind, slightly emargi- 

 nate in the centre. 



Mesonotum. — As long as the pronotum with the anterior and 

 posterior margins concave. Fore wing-cases with broad base 

 attached to the mesonotum, end somewhat pointed. 



Metanotum. — Nearly equal in form to the mesonotum, but 

 slightly shorter. The end of the hind wing-case reaches the 3rd 

 abdominal segment. 



Legs. — Almost as in the imago, but not so stout. Hind legs 

 not reaching the end of abdomen. 



Abdomen. — Long, nearly as broad as the pronotum with the 

 dorsum slightly arched and with scattered brown hairs. Styli 

 conical with a few hairs. 



