INTRODUCTORY NOTE. 



This paper was prepared by S. I. Kmvana, A. ^I. with the assistance 

 of Messrs. S. Oiiiiki and S. Hori, entomologists of our station at the 

 request of the Bureau of agriculture, Department of agriculture 

 and commerce ; it contains the results of observations concerning the 

 origin and distribution of the San Jose Scale in Japan. 



Y. Kozai, Nu(jakuliakiislil (Dr. agr.) 



DiL-ector of the Imperial Agricultural Experiment Station, 

 at Nishigahara, Tokyo, Japan. 



