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Worker: Length 4-4.5 mm. Head yellowish white; body whitish. 

 Antennae 15-16-jointed. 



Egg: Length 1.3 mm. Width 0.3 mm. Whitish in color. 



2. Life History. 



The swarming of the winged form of this species generally take place 

 3 or 4 times between the end of May and first part of July in the Main 

 Island and Kiushu; in Formosa between the early part of May and 

 that of June. The swarmings are simultaneous for all the nests lying 

 within a certain locality as in the case of the above-mentioned species, 

 although the time is between 6 p.m. and 10 p.m. The swarm is attracted 

 by bright lights. As with the above mentioned species, the winged insects 

 form new homes after the swarming ; they mostly copulated and lay their 

 eggs in wood covered with earth where they form their nest. Often they 

 make their nest in a damp portion of a house. Being strongly reproduc- 

 tive, a single matured queen lays hundred eggs. Thus, the family grows 

 enormously in a short time. 



As the queen advances in her stages of growth, the workers plaster 

 wooden particles with saliva around the queen's room ; the nest thus made 

 often attains a size of 3 ft. in diameter which is either oval or spherical 

 in shape ; it is mostly formed several feet below the surface of the ground, 

 but sometimes in a building. 



The workers make ravages on every possible part of a building and 

 other wooden articles around their nest and they often make their resting 

 places there. Like the preceding species, the white ants pass the winter 

 in the nest and lead a dormant life. Toward April, they wake and show 

 considerable activity. Soldiers secrete an acid juice in their heads to 

 protect themselves against enemies such as true ants. 



Unlike the preceding, this species does not give rise to a substitute 

 royal form, even if a detached colony of a family is formed. This was 

 proved by the successive experiments and the colonies so treated soon 

 perished. The formation of nymph of the substitute royal form seems 

 only to be possible after the total extinction of the true royal forms. The 

 latter are always characterised by the small number of members being 

 limited to one pair or few. 



