The Doryphora decemlineata.
1801. In the year 1799 I discovered in [Huntington, Conn.] the Potatoe Bug, or American Cantharides.—Wm. Shelton in the Conn. Journal: Mass. Spy, July 29.
1838. This company, formed for the praiseworthy purpose of encouraging the growth of potato-buys, and manufacturing potato-bug oil.—The Hesperian, Columbus, O., i. 42.
1852. While the locusts this year move in advance, and the grass-hoppers forage among the corn, General Potato-bug has squatted down with his innumerable hosts in the gardens and patches.—Knick. Mag., xl. 260 (Sept.).
1868. The ravages … of the potato-bug.—‘Report U.S. Commission on Agriculture,’ p. 10. (N.E.D.)
