xv, 4 Oshima: Formosan Termites 379 



Anthracene oil, being a product of destructive distillation of 

 coal tar, emits a characteristic, unpleasant odor. At the same 

 time it is dirty and viscous. Of course, there is no objection 

 to the use of this oil in the field; that is, for the sake of pres- 

 ervation of railway sleepers or electric poles. However, it is 

 not recommended for use in houses, on account of its staining 

 timbers. 



SUMMARY 



1. In Formosa three species of termite, namely, Leucoterm.es flaviceps 



Oshima, Coptotermes formosanus Shiraki, and Odontoterm.es for- 

 mosanus (Shiraki), are injurious to wooden structures. 



2. A pair of mature individuals of Coptotermes formosanus is able 



to start a new colony. 



3. In a newly stablished colony of Coptotermes formosanus, egg laying 



begins five to thirteen days after swarming. 



4. Coptotermes formosanus lays from one to four eggs a day. 



5. Eggs of Coptotermes formosanus hatch in from twenty-four to 



thirty -two days after they are laid. 



6. The soldier of Coptotermes formosanus develops from the egg laid 



by the queen. 



7. Coptotermes formosanus attacks lime mortar. 



8. The principal food of Coptotermes formosanus is cellulose. 



9. The termite-proof concrete layer is entirely satisfactory in prevent- 



ing the entrance of termites from the ground. 



10. Teak and cypress pine are absolutely immune from the attack of 



Formosan termites. 



11. The resistance of timber is not due to its hardness or weight. 



12. The resistance of timber is not due to the inorganic compounds 



contained in it. 



13. The resistance of timber is due to organic compounds that can be 



extracted by benzene or alcohol. 



14. Cypress pine contains "guajol," a sesquiterpene alcohol. 



15. Foochow cedar and Randai cedar contain "cedrol," a sesquiterpene 



alcohol. 



16. The resistance of timber is due to the presence of sesquiterpene 



alcohol. 



17. Camphor green oil contains 25 per cent of sesquiterpene alcohol. 



18. Camphor green oil is entirely satisfactory as a preventive for 



buildings. 



19. The anthracene oil fractionated from coal tar is effective in pre- 



venting the damage of Odontotermes formosanus. 



