1. Also called smaller European elm bark beetle . a shiny, dark reddish-brown bark beetle, Scolytus multistriatus, originating in Europe and now widespread in the U.S.: the primary vector of Dutch elm disease.
2. Also called native elm bark beetle . a bark beetle, Hylurgopinus opaculus, of eastern North America, that also transmits Dutch elm disease.
[ 1905-10 ]