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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1899 Excerpt:...not introduced from a foreign country. Mr. Abe found this same pest on a tree nearly a hundred years old, with no possible chance of its having come in contact with foreign or native fruit trees that were infested. He said, "The reason we did not know this insect until to-day is because it is so small, and so hard to see." 1 Vol. Ill, No. u, Dec. 15, 1899, p. 452. On June 12, 1900, I called upon Professor M. Miyoshi, at Koishikawa Botanical Garden, Imperial University, Tokyo. He said that last winter Professor Treub, Director of the Botanical Garden, Buitenzorg, Java, sent a letter (dated Jan. 15) to him asking whether the San Jose scale insect existed in Japan, and if it did, whether it was native to Japan. Professor Miyoshi, knowing nothing about the scale, wrote to Professor Sasaki, Professor Matsumura, and Mr. Nawa, asking about this matter. Professor Sasaki answered February 10, 1900, saying that it was not known to exist in Japan, but the matter was being investigated. Professor Matsumura, under date of February 12th, writes, "It does not exist in Japan," and February 29th, Mr. Nawa wrote, "not certain." Mr. Kikuchi Hirosaki thinks it is native to that part of the country and has existed there many years, but it has become worse since the importation of foreign fruit trees. The reason for this is that the foreign trees being younger and more tender are attacked by the insect in preference to the old native ones. Food Plants. I found the San Jose scale on the following hosts in Japan: pear, apple, plum, peach, Japanese quince, currant, willow (Salix gracilistyla), Pilea pumila and Paonia moutan. Parasites And Natural Enemies. One species of Aphelinid fly (species undetermined) is a common parasite. Many of my mounted speci...