First report of Pineus strobi (Hartig, 1839) (Hemiptera: Adelgidae) in western North America.
The pine bark adelgid, Pineus strobi [Cinara strobi] (Hempitera: Adelgidae), is native to eastern North America and is found throughout the natural range of its main host species, eastern white pine, Pinus strobus (Pinaceae), which stretches from the Atlantic coast, west to Ontario, Canada, and Minnesota, USA. This paper confirms for the first time the presence of Pineus strobi west of this range in Washington, Colorado, and Saskatchewan by identification of contemporary samples using morphology and DNA barcodes. Information is also included from existing slidemounted specimens of Pineus strobi putatively originating from Oregon that are deposited in the United States National Museum of Natural History Entomology Collection. This is thought to be the first published report of this species in western North America.