EEYISION OF THE JAPANESE TERMITES. 45 



fig. 9, d). Left mandible also 4 -toothed : 1st tooth sharp, with 

 tip slightly incurved ; 2nd and 3rd almost of equal size, the latter 

 with tip directed rather posteriorly ; 4th largest with edge convex 

 and finely serrate. — (Text-fig. 9, e). 



Pronotum. — Broader than the head, subreniform, broadly con- 

 cave in front and convex behind. Margin with hairs of varying 

 length.— (Text-fig. 9, f). 



Mesonotum. — A little longer than the pronotum, nearly straight 

 in front and concave behind. Median suture very distinct, black 

 coloured on its anterior half. 



Metanotum. — Almost similar in size and shape to the meso- 

 notum. Median suture also as in the mesonotum. 



Fore wings. — Wing-stump much larger than that of the 

 hind wings, with cross -suture convex and exceeding the posterior 

 margin of the mesonotum. Wing membrane nearly three and one 

 half times as long as broad, with apex rather rounded. Subcosta 

 very short. Radius joins the costa after running a short distance 

 beyond the cross-suture. Radius-sector and mediana thick, un- 

 branched, running close together and reach near the apex of the 

 wing, often with a few connections obscurely defined. Cubitus 

 faint, composed of dots, runs through about the middle of the 

 wing, and has 10-12 branches, of which 4-6 innermost well defined, 

 the rest weaker. Interspaces between the mediana and cubitus, 

 and also those between the branches of cubitus are finely dotted. — 

 (Text-fig. 9, g). 



Hind wings. — Wing-stump very small, with cross-suture 

 reaching the middle of the metanotum. Subcosta obscure. Radius 

 as in the fore wings. Mediana arises from the radius-sector 

 at about basal one fifth of the latter. The 3-4 inner branches of 

 the cubitus distinct ; the remainder 4-5 weaker. Anal with 1-3 



