REVISION OF THE JAPANESE TERMITES. 



95 



Imago. 

 (PL III. Fig. 18 ; Text-fig. 22). 



Colour. — Head brown, with paler spots. Post-clypeus, labrnm 

 and palpi yellowish brown. Antennae yellowish, ante-clypeus whit- 

 ish. Pronotum yellowish brown, lighter in front, with a Y-shaped 

 mark much lighter. Abdomen yellowish brown above, yellow below. 

 Femora pale yellowish, tibiae and tarsi somewhat darker. Wings 

 hyaline, pale yellowish, veins light brown at the base. Wing- 

 stumps brownish. 



Head. — Bound, summit rather flat. Hairs rather dense. 

 Fontanelle very small, median suture visible. — (Text-fig. 22, a). 



Antennae. — Long, 19-21 -jointed. When there are 21 joints: 

 1st joint large, cylindrical ; 2nd smaller ; 3rd shortest, annulate ; 



Text-fig. 22. Coptotermes formosanus. Imago, a, Head ; b, 

 Antenna ; c, Labrum ; d, Eight mandible ; e, Left mandible ; f , 

 Pronotum ; g, Fore wing ; h, Hind flJng, (a, b, f x 20 ; c — e x 33 ; 

 g, hx4). 



4th-6th orbiculate ; the rest from circular to turbinate, becoming 



