Oshima: Formosan Termites 



335 



an important building material, it is classed as a most formidable 

 pest throughout Formosa. Moreover, as the method of at- 

 tack of this insect is insidious, usually leaving the outer layer 

 of wood intact as a protective covering from sunlight and its 

 natural enemies, so that the damage is always hidden until 

 beyond repair, it is a most dangerous enemy to buildings 

 (Plate IV). 



Table IV. — The rate of egg laying, Coptotermes formosanus. 



Date. 



Erbts. 



Larva. 



Total. 



Increase. 



Total. 



Increase. 



May 20» 











May 25 



2 1 2 







May 26.. 



1 



5 



B 

 6 

 8 

 9 

 11 

 13 

 14 

 14 

 15 

 15 

 16 

 16 

 17 

 17 

 18 

 19 

 20 

 20 

 20 

 20 

 20 

 17 

 16 

 15 

 14 

 10 

 6 

 6 

 4 

 4 

 3 

 3 

 



3 







May 27.-... . 







May 28 









May 29 



1 

 2 

 1 



2 

 2 



1 







May30 







May 31... 

































1 







June 7 









1 













June 12 



1 















1 

 1 

 1 





















































3 

 4 



5 

 6 

 10 

 14 

 14 

 16 

 16 

 17 

 17 

 20 



S 

 1 

 1 



1 



4 

 4 















July 3 









July 7 





July 8 -. 





2 



July 10 . ......... 





July 11 





1 



July 12 





July 13 





3 







167553 2 



■ Date of capture. 



