REVISION OF THE JAPANESE TERMITES. 47 



Nymph. 



Colour. — Mandible, spot on each side of the clypeus, spines 

 and claws of legs brown. Wing-cases light brownish yellow. 

 The rest milky white. 



Head. — Circular, nearly as long as broad, slightly rounded on 

 summit and sloping somewhat toward the forehead. Sutures not 

 visible. Hairs scanty. 



Antennae. — 10-1 3 -jointed, short. When there are 11 joints: 

 1st joint large, cylindrical, almost twice as long as broad ; 2nd 

 much shorter ; 3rd shortest and narrowest, annulate ; 4th larger 

 than 3rd but smaller than 2nd ; 5th-10th turbinate, becoming 

 larger toward the extremity ; 1 1th oval, slightly narrower than 

 10th. 



Eyes. — Round, more or less pigmented, scarcely projecting on 

 sides. 



Ocelli. — Obscure. 



Labrum. — Nearly as long as broad, rounded in front, sides 

 very slightly converging posteriorly. It has several short bristles 

 on the anterior border. 



Clypeus. — Trapezoidal, almost twice as broad as long, narrow 

 in front, but not very distinct from the forehead. 



Mandibles. — Almost similar in form to those of the imago. 



Pronotum. — Almost twice as broad as long. Anterior margin 

 concave, distinctly broader than the posterior margin. Postero- 

 lateral corners more strongly rounded than the antero -lateral. 

 Margin hairy. 



Mesonotum. — Almost as long as the pronotum, but broader. 

 Narrow and concave in front, straight and broad behind. Wing- 

 cases more or less developed. 



