EEVISION OF THE JAPANESE TERMITES. 



89 



Measurements 





Length (in m.m.) 



Breadth (in m.m.) 



Body 



11.0—12.0 





Head 



1.25—1.35 



1.2 —1.3 



Antenna (16-joints) 



2.17 





Labram 



0.4 —0.43 



0.53—0.6 



Pronotum 



0.6 —0.7 



1.03—1.23 



Mesonotum 



0.5 —0.6 



1.13—1.37 



Metanotum 



0.43—0.5 



1.1 —1.33 



Worker. 

 (Text-fig. 21). 



Colour. — Head pale yellow, with a dark spot on each side of thé 

 post-clypens. Mandibles and tarsal claws brownish, the rest dull white. 



Head. — Eound, flattened on the summit, and slightly concave 

 in the centre of the forehead. Fontanelle triangular-oval, sutures 

 not distinctly noticeable. Hairs scanty. — (Text-fig. 21, a). 



Antennae. — 14-1 8 -jointed, almost like those of the ergatoid, 

 but the middle portion not so broadened. — (Text-fig. 21, b). 



Eyes. — Round, whitish in colour and not projecting on sides. 



Ocelli. — Represented as a small spot just in front of the eye 

 on each side. 



Labrum. — Shorter than broad, broadly rounded in front, broadest 

 in the middle and narrowed behind. — (Text-fig. 21, c). 



Post-clypeus. — Longer than the ante-clypeus, more than twice 

 as broad as long, divided into two portions by the median suture. 



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

 (Text-fig. 21, d, e). 



