Photo (see it here) in 5/26/2016 Whitman County (Colfax) Gazette of Main
Street banner depicting "the one-time former doodle-bug railroad car
(sometimes called the "bug")
The Doodlebug was a motorized railcar used in various locations.
It linked Spokane with Lewiston. Inbetween stops included Colfax, Pullman and
Moscow.
More info at these links: