EEVISION OF THE JAPANESE TERMITES. 139 



Labram. — Slightly broader than long, broadest in the middle, 

 broadly rounded in front, lateral corners rounded, and the sides 

 converging toward the base. Anterior border white ; surface covered 

 with short hairs. — (Text-fig. 34, c). 



Post-clypeus. — Swollen, nearly truncate in front, rounded 

 on sides and convex behind. Median suture faint. 



Mandibles. — On the right 4 -toothed ; two sharp teeth above, 

 a small one below and a large flat one with the edge finely serrate 

 at the base. — (Text-fig. 34, d). On the left, it is also 4 -toothed ; 

 1st tooth with tip sharp and incurved ; 2nd with long edge ; 3rd 

 the smallest, with tip directed" posteriorly. — (Text-fig. 34, e). 



Pronotum. — Very hairy. More or less narrower than the head, 

 one and a half times as broad as long. Almost straight and slightly 

 raised in front, broadly rounded on antero-lateral corners, strongly 

 converging toward the posterior, and emarginate behind. — (Text-fig. 

 34, f). 



Mesonotum. — Longer than the pronotum, nearly truncate in 

 front, sides constricted in two places, deep in front and shallow 

 behind ; posterior margin divided into two lobes. 



Metanotum. — Almost similar in shape to the mesonotum. 



Fore wings. — Wing-stump very hairy, subtriangular, slightly 

 longer than that of the hind wings. Wing membrane lightly clothed 

 with fine hairs and finely spotted, more than three and a half 

 times as long as broad, rounded at the apex. Radius absent. 

 Radius- sector very thick, running close together with the anterior 

 margin of the wing. Mediana either simple or with 1-3 branches 

 runs near the cubitus. Cubitus with 8-10 oblique branches, of 

 which the first 4 or more become thickened, and the others remaining 

 faint, one or two bifurcating. — (Text-fig. 34, g). 



Hind wings. — Wing membrane slightly shorter than that of 



