Included in this lot we have a Western North America Rocky Mountain Locust Entomology map originating from 1879. The map was prepared under the direction of the U.S. Entomological Commission by Henry Gannett E.M. in 1879. The map displays sections of multiple states including Montana, Nevada, Utah, Wyoming, Idaho, and Oregon. The map displays the probable breeding ground for the Rocky Mountain Locusts. The piece is marked across the top reading "Map of a Portion of Western North America Showing the Distribution of Vegetation with Reference to the Multiplication of and Means of Subduing the Rocky Mountain Locust. Prepared under the direction of the U.S. Entomological Commission By Henry Gannett E.M. 1879 - Map 1 Middle Western Section". The piece shows color coded sections for different landscapes. The piece shows good condition overall with some light wear. The map measures 16" wide by 19" tall.