166 



C. SASAKI. 



p. 43) is probably identical with Aspidiotus perniciosus. He is inclined 

 to the opinion that this insect was introduced into Australia from Japan, 

 stating that within the last few years many fruit trees have been im- 

 ported from Japan into Australia Mr. Koebele also made 



examinations at our requests, for Aspidiotus perniciosus on the island of 

 Ceylon, and is rather confident that it does not occur there ; at least he 



was unable to find it Mr. Takahashi has studied the scale 



insects of Japan since his return to that country in 1893, but reports 

 that he has not found Aspidiotus perniciosus. Mr. Koebele visited Japan 

 the past summer, and has written us twice that he has been unable 

 to find any positive evidence of the San José Scale in Japan nor has he 

 yet found it in China, as we learn from a letter from Hongkong, dated 

 November 12, 1895. 



The original home of the San José Scale is, therefore, still a matter 



of considerable doubt It may prove to be indigenous in 



Australia ; it may have come from Japan, China, or some other portion 

 of eastern Asia or perhaps from some of the islands in the Pacific." 



Moreover Messrs. L. 0. Howard and C. L. Marlatt 3 stated several 

 evidences, that the pernicious scale was first introduced into California 

 from Japan, and thus the latter is no doubt the original home of it. 

 The principal ground by which they sustain their opinion is briefly 

 as follows :— Prof. Cockerell, Messrs. F. M. Webster, Walter, W. Fro- 

 gatt, Knap and others as well as the Department of Agriculture at 

 Washington have found the pernicious scale on several fruit and orna- 

 mental trees introduced into Australia from Japan or on the trees 

 collected in that country. 



Since the last two years, I have spent some time to collect the 

 pernicious scale in our country ; but I could not find any. Fortunately, 

 in last May, I found an allied species on pear twigs collected by Mr. 

 Tsuchida in the Orchards near Ichikawa Station lying not far from the 

 City of Tokyo. In the middle part of last August, I found the same 

 scale on the pear trees in the orchards of Kawasaki lying near the coast 

 line between Tokyo and Yokohama, where many foreign pears, apples 



