In April 2003, the banded elm bark beetle (BEBB), Scolytus schevyrewi Semenov, an invasive from Asia, was first detected in North America in Colorado and Utah. To date, BEBB has been detected in 21 states, particularly in in the Rocky Mountain region, the Great Basin, and California. BEBB attacks elm trees and likely vectors the fungal pathogen causing Dutch elm disease. BEBB shares a similar biology and appearance to an established invasive, the smaller European elm bark beetle (EEBB), Scolytus multistriatus (Marsham). Efforts are underway to develop a bait that is selectively attractive to BEBB but not to EEBB. During 2004 and 2005, bark beetle flight responses to semiochemical-baited funnel traps were monitored in Lakewood, Colorado and Reno, Nevada. In 2004, seven semiochemical treatments were tested, including an unbaited control, 2-methyl-3-buten-2-ol from Phero Tech, ChemTica and IPM Tech., 3-methyl-3-buten-1-ol from ChemTica Int., and Multilure® (commercial bait for EEBB) from Phero Tech and ChemTica. Treatments were replicated in three blocks in Reno, and in seven blocks in Lakewood. 2-Methyl-3-buten-2-ol was the optimal bait since BEBB responded selectively to these baits with low response from the EEBB. BEBB responded to Multilure®, but high numbers of EEBB in the same traps made sorting cumbersome. In 2005, three blocks of treatments were installed at the same two sites to assay the dose-response of BEBB to various release rates of 2-methyl-3-buten-2-ol. Five treatments included an unbaited control, and 2-methyl-3-buten-2-ol at release rates of 5-18, 17-60, 81-271, and 810-2710 mg/day.