Among the interesting data in the report on “The Gypsy Moth,” by Forbush and Fernald, which was published by the Massachusetts State Board of Agriculture in 1896, will be found a record of a series of experiments to determine the distance which young gypsy moth caterpillars will travel. Seven caterpillars were used, and it was found that the distance they crawled before dying ranged from 36 to 144 feet. Another record of experiments conducted with another insect is given on page 23 of bulletin 72 of the New York State Museum, which is bulletin 19 on entomology, published in 1903. In it Dr. Felt writes concerning the grape root worm that he carried on “some experiments to determine the burrowing and traveling power of these little creatures. One small grub was placed on a piece of paper at 9.27 in the morning and its wanderings were carefully traced with a pencil till 4.43 in the afternoon. The little creature traveled almost continuously during the entire period and showed a decided tendency to turn to the left. It covered the relatively enormous distance of over 47 feet in seven hours, or an average of about 2 yards an hour. The grub was placed in a dry vial and under such unfavorable conditions lived about three days.”