Description of a modified Manitoba trap for catching female horse flies (Diptera: Tabanidae).

A modification of the well-known Manitoba trap is described rendering it more suitable for the capture of female tabanids. A large plastic ball painted black suspended under the top and freely moved by wind currents proved advantageous, and an acrylic paint providing a black shiny surface increased the catch. The addition of a source of carbon dioxide would be even more advantageous.