Files from the office of Ladd Livingston, Forest Insect and Disease Supervisor in Coeur d'Alene, related to the Idaho State Forester Insect Work and the Douglas Fir Tussock Moth project.

Contains records, annual reports, surveys, and correspondence between Ladd Livingston, the Idaho Department of Lands, and the United States Forest Service. The collection centers around entomological correspondence concerning forest insects, diseases, and preventative measures to support and preserve forests across Idaho.