The San Jose Scale in Japan. 



I. Introductory. 



This paper will deal only with the San Jose Scale, with regard to its 

 occurrence in Japan, its introduction into the country, and the extent to which 

 the insect has spread from the point at which it was introduced. 



In relation to the occurrence of the scale, the elevation of both wild and 

 cultivated lands has been fully described. The natural enemies and other 

 subjects relating to the scale are now under observation. 



II. General notes. 



Before 1897 the San Jose Scale was not known in Japan, although it 

 was supposed to have existed there long ago. After Mr. A. Craw, a quaran- 

 tine officer of the port of San Francisco, California, U. S. A., had found this 

 insect on trees from Japan several times during the years 1897-98, Japan has 

 been mentioned as the original home of the scale by the authorities in America 

 and other countries ; and papers and pamphlets on the subject were 

 handed to our station. 



In 1897 there came into our hands reports saying that many plants and 

 fruit trees from Japan had been destroyed under the strict enforcements of 

 the quarantine regulations at the port of San Francisco, California. By 

 virtue of the proclamation issued by the N. S. AVale's government in 

 December lOth 1897, certain ornamental plants from Japan were refused 

 entrance into her ports. Thus our attention was at once attracted to that 

 pest ; the exporters paid special attention to the matter and issued circulars 

 or notices to the nurseries and fruit growers ; the horticulturists began to look 

 after the matter. 



