(Olympia, WA) -- Anyone who purchased a Christmas tree this year might want to check for uninvited guests. The Washington Department of Agriculture reports an insect called elongate hemlock scale has been found on out-of-state holiday greenery. The bug is oval and flat shaped and light yellow-brown to brownish-orange in color. Anyone who finds elongate hemlock scale should contact the Washington Department of Agriculture and dispose of the greenery by cutting it up, double-bagging it and throwing it away.