Several authors (Berry, 1916, 1931; Brooks, 1955; Cockerell, 1908, 1910) have reported evidence of damage by leaf-cutter bees (Hymenoptera: Megachilidae) from the Tertiary of the United States. These have been predominantly Eocene in age. During field investigations (1990-1991), four further fossil plant specimens with possible leaf-cutter bee damage were discovered from the middle Eocene sediments of the Klondike Mountain Formation near Republic (Ferry County), Washington (Figure 1), and are reported here to draw attention to the common occurrence of these kinds of insect “trace fossils” in the paleobotanical record.