Notes on the natural history of portions of Montana and Dakota; being the substance of a report to the Secretary of War on the collections made by the North Pacific Railroad Expedition of 1873, Gen. D.S. Stanley, commander

Canis latrans Say. Coyote. Prairie Wolf. Not common east of the Yellowstone. In the valley of the Yel- lowstone and westward, they were heard in considerable numbers every night, and were occasionally seen while we were on the march, particularly in the Musselshell district. None were heard on our way out till we reached the Yellowstone, but from the Yellowstone "Crossing" westward they were at times quite numerous. The wolves, including the Coyote and the Gray Wolf, have been nearly extermin- ated over the region most frequented by hunters, by the use of strychnine.

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