Utah State University Extension
In July 2014, the Utah Plant Pest Diagnostic Lab and USDA APHIS confirmed the first reported occurrence of elm seed bug (Lygaeidae: Arocatus melanocephalus) in the state of Utah (Fig. 1). A native of Europe, the elm seed bug was first identified in the U.S. in Idaho in 2012. It has since been found in Oregon, Washington, British Columbia, Canada and in various locations throughout Asia and Europe. While Utah’s first submission originated from Salt Lake County, elm seed bug is now widely distributed along the Wasatch Front and Cache Co., and has been reported west to Duchesne Co., east to Tooele Co. and south to Grand Co.
Davis, Ryan S., "Elm Seed Bug" (2017). All Current Publications. Paper 1770.